Posts Tagged ‘review’

Review of Nagrace HPH NT-V6 Android Mini PC Powered by RK3288 with 4GB RAM, 32GB Internal Storage

September 30th, 2014 4 comments

Last week-end, I finally received TP-Link TL-WDR7500 router (Chinese variant of Arched C7) router, so I could complete my review of Nagrace HPH NT-V6 including 802.11ac Wi-Fi. I’ve already listed the specifications, and taken a few pictures of the device and the board, and today I’ll focus on the test results. I’ll start by giving my first impressions, going through the user interface and settings, before testing video playback, as well as benchmarking networking, storage and overall system performance, playing some games, and testing most hardware features of this mini PC.

First Boot, Settings and First Impressions

A simple infrared remote control is provided with the device, and I’ve quickly tried it by inserting two AAA batteries, and it works fine, but for the rest of testing I switched to Mele F10 Deluxe air mouse to control the device, as it’s much more user friendly than any IR remote. Before booting up the device, I’ve connected an HDMI cable, a USB hard drive, an Ethernet cable, a USB webcam, and a USB hub with RF dongles for my air mouse and gamepad, and USB flash drive. Finally connect the power supply to boot the device in about 20 seconds.

NT-V6 User Interface (Click to Enlarge)

NT-V6 User Interface (Click to Enlarge)

The company has made their user interface, but in a similar style than the one common found in Amlogic S802 devices. On the top right, you’ve network status (Wi-Fi, Ethernet, and Bluetooth). The status bar won’t show in the main menu, but in some other apps and settings, you’ll be able to access it. A large section with 9 folders can be found on the left with Movie (Videoplayer), XBMC (yes a folder too containing XBMC, so you have to click twice), Music, Game, Browser, Stream (Youtube and Netflix), Screencast, Social and Market. On the right, you’ve got the time, and weather (that does not work), and four more icons: “My Device” (Actually a file manager), “All Apps”, “Settings”, and “All Tasks Killer”. The user interface resolution is set to 1920×1080.

The Android settings are very similar to other RK3288 TV box. The Wireless and Networks menu comes with Wi-Fi, Bluetooth, Ethernet, and Data Usage sections, as well as a “More” section with VPN, Portable Hotspot, etc… Display settings let you set the font size, adjust the screen size, select between HDMI, YPbPr (Component), and “TV” (Composite) video outputs, and the resolution: “auto”, 1080p 24/25/30/50/60Hz, 720p 50/60, 720×576 or 720×480. I don’t own a 4K UHD TV, but if I did, there should also be some 4K options. You can choose between “Default Output” (PCM), “Spdif Passthough”, and “HDMI Bitstream” (HDMI pass-through) in the Sound settings. HDMI video output is working, but composite and component (YPbPr) video outputs failed to work. An AV cable was not included, so I used some other cables, and I could only see a black screen. Audio (L/R) works fine.

What about HDMI In? I’ve connected Orino R28 meta to the HDMI input port of the NT-V6, clicked on HDMI IN app, and I could see R28 user interface, but apart from that I could not do much. Things like Android notifications of the “host” won’t show up, as as it stands the HDMI In function is just like a cheap HDMI switcher. To go back to main user interface, simply press the back key on the remote.

The version of HPH NT-V6 I got comes with a 32GB eMMC, other options includes 8, 16 or 64 GB, which is partitioned into a 1.91GB “Internal Storage” partition for apps, and a 25.99 GB “NAND FLASH” partition for data. After I installed all applications I needed for this review, I was left with 568 MB available. It would have been preferable to design the system with a single flash partition, or make the “Internal Storage” a bit bigger. Nevertheless with 26 GB for data, there’s plenty of data, even to download and place movies directly from eMMC flash.

The “About device” section only lists the model number (HPH-F0-N6) and the Android version (4.4.2). It’s running on top of Linux kernel 3.10.0, but it’s not indicated in this section. The firmware is not rooted, and NT-V6 is another device with a USB A receptacle, instead of a micro USB port, and I could not root it via the OTG port since I don’t have a proper cable. There’s a System Update app for OTA firmware upgrades, and the firmware version is currently 1.1.9 in my device. I’m not 100% sure it works, because I have not received a firmware upgrade yet.

In the video below, I boot the device, and go though the user interface, and system settings.

Google Play Store mostly works. I could install most apps, install a paid app, such as ES File Explorer, MX Player, Antutu, Beach Buggy Blitz, CPU-Z, etc…  Vidonn activity tracker app was reported as “incompatible with your device”. I discover an easy way to quickly scan through compatible apps that you’ve installed in other devices previously with the same account. Go to My Apps->All in the Play Store, and you can scroll down to see which apps are already installed, or incompatible. You can also select multiple apps, and click Install for bulk installation. Since I got Riptide GP2 as a “free app of the day”, I installed Amazon AppStore to install the game.

Power control work as it should. A short press on the remote will put the device in standby mode, and you start it again but pressing the remote button again. A long press on the power button will pop-up the Android menu with Power Off/Airplane Mode/Silent Mode, in order to achieve true power off. A press on the box button will have the same effect. When the device is powered off, you can press the remote power button, or the power button on the media player, although I’ve found the latter does not always work… It takes 3 to 4 second for power LED to run blue after pressing the power button, so it’s a bit confusing at times. and you need to wait 4 seconds to make sure you’ve really powered the device on. Both the included remote control and Mele F10 Deluxe could power on/off NT-V6. As with other RK3288 devices, the case may become hot. After Antutu benchmark, the maximum temperatures measured with an infrared thermometer on the top and bottom of the box were respectively 58°C and 64°C, and 58°C and 66°C after playing Riptide GP2 for over 20 minutes.

HPH NT-V6 mini PC is very stable, and I never had a reboot and hang up during my 6-8 hours testing. Boot time (20s) and XBMC load time (2s) are very similar to Kingnovel R6 as both integrate a fast eMMC flash.

Video Playback

Video playback results are the as Kingnovel R6 (previously known as K-R68), so I invite you to visit R6 review for video testing. To summarize, a version of XMBC 13 alpha12 is pre-installed, and suffers from not-so-smooth MPEG2 playback (in some files), lack of support for VC1, some 4K videos are not smooth at all, as well as audio/sync issues.

What’s different however is that I could play some HEVC/H.265 videos in XBMC:

  • H.265 codec / MPEG TS container (Elecard 360p / 720p / 1080p) – Audio only
  • Beauty_3840x2160_120fps_420_8bit_HEVC_MP4.mp4 – OK
  • Bosphorus_3840x2160_120fps_420_8bit_HEVC_MP4.mp4 – OK
  • Jockey_3840x2160_120fps_420_8bit_HEVC_TS.ts – Won’t start to play

I’ve also test some VP9 videos. They can’t be played in XBMC, but can in MX Player:

  • out9.webm (low resolution) – OK. H/W decode according to MX Player.
  • phfx_4KHD_VP9TestFootage.webm (3840×2160) – Maybe 1 or 2 frames per second, still with H/W decode according to MX Player, but internally it’s certainly using S/W decode.

I also played a complete FullHD video (1h50) with XBMC to test stability. I had the same slow XBMC exit as with other boxes, which does not happen all the time, and apparently only during scanning or other background tasks.

Links to various video samples used in this review and be found in “Where to get video, audio and images samples” post and comments.

Network Performance (Wi-Fi and Ethernet)

To evaluate network performance, I transfer a 278 MB file between a SAMBA share and the internal flash, and vice versa, using ES File Explorer, and repeating the test three times. I now have two routers, but I’ll keep testing 2.4GHz Wi-Fi with my old TP-Link TL-WR940N router, and test 5GHz Wi-Fi with TP-Link TL-WDR7500 (Archer C7) which also support 802.11ac. I already tested NT-V6 in TL-WDR7500 review, and found the connected with NT-V6 to be unstable, and not that fast. That was on Sunday… But on Monday I tested it again, and the performance and stability was much better. I have no idea why. The only differences are: it was raining on Monday, and I was the only  one using Wi-Fi, whereas on week-ends, TL-WR940N may get 4 to 5 connected clients. So it went from 1.92 MB/s to 3.91 MB/s average speed with 802.11n, and 3.02MB/s  to 4.85 MB/s with 802.11ac, the best performance I ever got with Wi-Fi.

Throughput in MB/s

Throughput in MB/s

The top line is with 802.11ac, and the second line with 802.11n @ 2.4GHz. But as I said this chart may overestimate the actual Wi-Fi capabilities of NT-V6, and performance seem irregular… Using “sunday” results, 802.11ac would have been in third position in the chart, and 802.11n between Vega S89 and AV200.

And now Ethernet…. I had rather disappointing performance with Fast Ethernet, and still more problems with Gigabit Ethernet… I should really buy another Gigabit switch to make sure that’s not the root cause.

Fast Ethernet Performance in MB/s

Fast Ethernet Performance in MB/s

I could actually get a Gigabit Ethernet connection, but I got a transfer rate of 250 KB/s from network to flash, and 1.8MB/s from flash to network…

In order to get a “pure” network test, I also used iPerf app and iperf in my Ubuntu PC, using “iperf -t 60 -c -d” command line in Android. It clearly show some issues with both Fast and Gigabit Ethernet, and whereas one direction has good performance, the other is problematic (100Mbps first, then Gigabit):

Client connecting to, TCP port 5001
TCP window size: 85.0 KByte (default)
[  6] local port 35429 connected with port 5001
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-60.1 sec   672 MBytes  93.8 Mbits/sec
[  6]  0.0-60.1 sec  81.0 MBytes  11.3 Mbits/sec
Client connecting to, TCP port 5001
TCP window size: 85.0 KByte (default)
[  6] local port 35764 connected with port 5001
[  4]  0.0-60.0 sec  6.16 GBytes   882 Mbits/sec
[  6]  0.0-60.9 sec  16.5 MBytes  2.27 Mbits/sec

Miscellaneous Tests


File transfer over Bluetooth works fine. I use ThL W200 Android smartphone to send a picture to NT-V6.

I skipped Sixaxis test for PS3 Bluetooth Gamepad support, because the firmware is not rooted, and I’m not sure how to root it without OTG cable.

Vidonn X5 activity tracker was used to test Bluetooth 4.0 LE. I could not install Vidonn app from Google Play (incompatible), so I instead installed vidonn.apk, and successfully connected to my wristband to get the data. Note-to-self: make sure to set the time on the mini PC before making the connection to the wristband, or it will mess with the data…


The system could detect and mounted a micro SD card and USB flash drive formatted with FAT32.
It seems nobody is interested in having EXT-3/4 working for external storage in Android, and as usual only the NTFS and FAT32 partitions on my USB 3.0 hard drive could be mounted.

File System Read Write
EXT-4 Not mounted Not mounted
BTRFS Not mounted Not mounted

I benchmarked the eMMC and the NTFS partition on my hard drive with A1 SD Bench. There does not seem to be a standard for mount points in Android, and firmware from various (SoC) vendors, have different mount points. In this firmware, the NTFS partition is located in /mnt/usb_storage/USB_DISK2/USB3_NTFS. The read speed was 35.62MB/s, and the write speed of 15.08MB/s, so NT-V6 gets both the best read speed, and the worst write speed of all devices I tested.


USB NTFS Performance in MB/s

Hopefully, the only solution is some optimization for NTFS writing speed.

The Samsung eMMC found on the board has very good performance, reading at 55 MB/s, and writing at 18 MB/s.



Beside fast loading times, a product with a fast eMMC is much less likely to experience slowdowns.

USB Webcam

I could test audio successfully with the Echo service in Skype, but unfortunately although my webcam appeared to be detected in both Skype and Google Hangouts, I could only see a black screen during video calls.


Candy Crush Saga, Beach Buggy Blitz, and Riptide GP2 all worked pretty well. I played Candy Crush Saga with Mele F10 Deluxe, and the two racing games with Tronsmart Mars G01 wireless gamepad. Beach Buggy Blitz is super smooth all the time, even after maxing out graphics settings. Riptide GP2 is very playable as well, but not optimal all the time, but clearly mini PCs based on Rockchip RK3288, and much better than the rest of Chinese Android mini PCs thanks to its Mali T-764 GPU. I played the latter game for over 20 minutes to test stability, and I did not encounter any specific issues. Temperature measurements after game: 58°C (top) and 66°C (bottom).

Nagrace HPH NT-V6 Benchmark

CPU-Z app returns similar data as other TV boxes with Rockchip RK3288 processor being a four Cortex A12r0p1 core processor with a Mali-T764 GPU, except this time, the CPU frequency is between 312 MHz and 1.61 GHz, instead of topping at 1.8GHz for other devices.. I could also check there’s indeed 4GB RAM installed with over 2700 MB free.HPH_NT-V6_CPU-Z

NT-V6 could achieve G1H got 35,321 points in Antutu 5.1, a bit lower than Kingnovel R6 score (37,428), most probably because of the lower CPU frequency.


I had not run Vellamo 3.x  test in R6 media player, but the scores in NT-V6 are better than the ones for Uyesee G1H.


Ice Storm Extreme benchmark score (7,056) in 3DMark is however a bit lower than the two other RK3288 box I tested (7,278 and 7,531).

Ice Storm Extreme (Click to Enlarge)

Ice Storm Extreme (Click to Enlarge)


Nagrace HPH NT-V6 is a pretty good hardware with a fast processor, excellent 3D and eMMC storage performance. The firmware is stable, and provides a smooth user experience, without slowdowns. Wi-Fi can be excellent too, but stability may be an issue. As with other Rockchip RK3288 devices I’ve tested,  video playback in XBMC is rather disappointing, but at least there’s partial HEVC/H.265 codec support. partial, nbecause only some caontainers appear to be supported.


  • Fast new processor
  • Excellent 3D graphics performance for games
  • Stable and fast firmware.
  • Memory and Storage capacity (4GB / 32GB)
  • Excellent Wi-Fi performance, when it works
  • Fast eMMC, both for reading and writing speeds.
  • Both 720p and 1080p user interfaces are supported
  • Video Output – 1080p support 24, 25 ,30 , 50 and 60 Hz output. 4K @ 60Hz should be supported (not tested).
  • Partial HEVC/H.265 video decoding support in XBMC.
  • OTA update appear to be support
  • Proper power off/standby handling.
  • HDMI In


  • XBMC has too many issues: VC1 not supported, H.265 support only partial, audio/video sync issue, some MPEG-2 and XVID videos are skipping frames, some of the 4K videos I used could play properly, etc…
  • Some MPEG-2 file won’t play smooth in either XBMC or MX Player
  • Potential Ethernet issues, confirmed with my Gigabit switch (D-Link DSG-1005A) and 10/100Mbps D-Link router (configured as a switch).
  • Video output – Component and composite do not work atall (black screen)
  • Webcam not working properly (black screen) in Skype and Hangouts
  • Relatively slow write speed on NTFS/USB partition.
  • Wi-Fi may be unstable at times
  • HDMI In support is quite basic (only as HDMI switcher)

HPH NT-V6 with 4 GB RAM and 32 GB eMMC (as reviewed in this post) purchased for $189 including shipping by DHL or EMS, but there’s also a 2GB RAM/16GB eMMC available on Aliexpress for $129 + shipping. I’ve also been told Ugoos UT3 is based on the same board (TRN6A), but should have a different firmware. It is listed on Chinavasion for $149.99, and DealsPrime for $134.99 (bot 2GB/16GB versions). Resellers and distributors can check out Nagrace NT-V6 product page to order in quantities.

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TP-Link TL-WDR7500 (Archer C7) 802.11ac Router Review

September 28th, 2014 12 comments

With several new Android devices coming with the latest 802.11ac Wi-Fi, I decided I should buy a new router with AC1200 class or greater and Gigabit Ethernet support, and with a budget of $100. Xiaomi Mi Wi-Fi Mini router almost matched my requirements, but unfortunately only comes with Fast Ethernet ports. TP-Link Archer C7 selling for $96 Amazon US exactly matched my budget, and outmatched my requirements being an AC1750 router with 5x Gigabit Ethernet ports, and two USB ports. Since Amazon won’t ship to my location and shipping would have gone over budget, I expected to find it locally for a slightly higher price, but it ended up selling for over $200 here, allegedly because of a lifetime guarantee. Finally, I ended up buying TP-Link TL-WDR7500, the Chinese version of Archer C7 with 6 Wi-Fi antennas instead of 3, for $94.32 including shipping on Aliexpress.

I’ll take some pictures of the device, explain options to change the Chinese web interface into English, compare the Wi-Fi range to my existing router (TP-Link), and perform some transfer test using 802.11n and 802.11ac with Tronsmart Orion R28 Meta, and HPH NT-V6 Android media player both supported 802.11ac thanks to AP6335 wireless module.

Unboxing Photos

When I received the package I was surprised how big the parcel was, and it felt massive compared to the size of mini PC packages.


The complete package is in Chinese, so this router is definitely designed for the Chinese market only. Based on the text on the package, it’s indeed an AC1700 router with a throughput up to 1.3Gbps @ 5 GHz, and 450 Mbps @ 2.4 Ghz.

The router itself is quite big, and the 6 antennas (3 for 2.4Ghz, 3 for 5Ghz) explain why you’d need such as large package. As expected all documents are in Chinese.

TL-DWR7500 Router and Accessories.

TL-DWR7500 Router and Accessories.

The router comes with a 2m-meter blue Ethernet cable, a 12V/1A power supply, a user’s manual in Chinese, a warranty card, and another small paper listing where traces of lead, mercury, cadmium… may be found.

TP-Link TL-WDR7500 Router (Click to Enlarge)

TP-Link TL-WDR7500 Router (Click to Enlarge)

TP-Link TP-WDR7500 router looks pretty neat once it’s installed. You’ll get a bunch of LEDS on the front panel (left to right): Power, System/Status, 2.4 GHz connection, 5GHz connection, 4x LEDs for LAN ports, 1x LED for WAN port, and WPS. On the back panel, we’ll find a power jack, a power button, two USB 2.0 ports with LED for mass storage (FTP, Samba…), a WAN port, four LAN ports, and a WPS/Reset button.

Bottom of Enclosure (Click to Enlarge)

Bottom of Enclosure (Click to Enlarge)

On the case’s bottom you’ll get a sticker with loin details, S/N, and MAC address. You’ll also notice two holes for wall-mounting the router.

TP-Link TL-WDR7500 / Archer C7 Review

Setting up the router

So I’ve installed my new router close to my old one to perform range and performance testing.

TP-LINK TL-WR940N_Archer_C7TP-Link TL-WR940N is wall-mounted, beer can optimized, and comes with 3 external antennas for 2.4 GHz Wi-Fi (no 5Ghz support). This is actually equivalent to TL-WDR7500 router with 3 external antennas for 2.4 GHz Wi-Fi, and three more with 5GHz.

Once everything is connected, you’ll need to access the router with Wi-Fi or Ethernet using the router IP address (, and login credentials (admin/admin). Provide the computer/device you use to connect to the router support dual band Wi-Fi, you should see two new ESSID: TP-LINK_5GHz_F9EB0E and TP-LINK_2.4GHz_F9EB0E for respectively 5 and 2.4 GHz Wi-Fi.

TP-Link_Archer_C7_ChineseFor most people, using the Chinese interface may be a problem. But luckily there are several options:

  • Use TP-Link Archer C7 simulator side-by-side the Chinese router.
  • Use Greasemonkey add-ons in Firefox with TPlink-WDR7500-UITranslate script
  • Download and flash Archer C7 firmware. There are several version of Archer C7 and TL-WDR7500, so you’d have to make sure you install the right, or you may brick your router.
  • Install OpenWRT. Depending on the model you bought, only 2.4 GHz may be supported, and the latest version of the PCB may not be supported yet. According to the router interface. mine is “WDR7500 v2″, the earlier model. I haven’t open it, so I can’t confirm. You can find picture of the PCB on OpenWRT. The wireless SoC used should either be Qualcomm QCA9880-AR1A (v1) or QCA9880-BR4A (v2).

Since I use Firefox as my main browser, I just installed the script as it’s fast and easy, and it automatically translates the left menu, and the most important settings.


However, anything below DHCP server has not been translated. So it’s enough for basic settings, but for more access settings you’ll probably want to find a better option. The script limits itself so some IP ranges, and when I changed the default subnet to 192.168.2.x, I had to edit the script within Firefox to add It’s very easy to do.

TP-Link TL-WDR7500 Signal Strength and Range

I haven’t kept the default ESSID in the router. My older TP-Link router is CNX-TRANLATION (2.4 Ghz), and I’ve configure TL-WDR7500 with CNX-SOFTWARE (2.4 GHz), and CNX-SOFTWARE_5G (5Ghz). In this part of the review, I just walked about with my phone (ThL W200) checking the signal strength in various locations with Wifi analyzer.

My Office

My Office – 1 wall about 6 meters from routers


Wife’s Office – 2 walls, about 18 meters from routers


Garden – 1 wall about 14 meters from routers


Street – 1 wall about 50 meters from router

It’s quite clear both router have about the same range, and signal strength at various locations. The only small difference is that on the street, CNX-TRANSLATION (TL-WR940N) had a tendency to come and go, whereas CNX-SOFTWARE (TL-WDR7500) signal appeared to be more stable.

I was unable to test 5GHz 802.11n/ac range, since I don’t own any mobile devices supporting it.

TP-Link TL-WDR7500 Throughput Testing

Finding out a router range is interesting, but the reason to buy a 802.11ac is not really about improved range, but rather faster throughput. So I’ll put two Android TV boxes to test, transferring a 278 MB from SAMBA to their internal eMMC and vice-versa using 802.11n (2.4 GHz) with both TL-WR940N and TL-WDR7500 routers, and 802.11ac with the new router. I used ES File Explorer for this purpose, repeating the tests three times, and averaged the results.

The first device under test was Tronsmart Orion R28 Meta Android mini PC with Rockchip RK3288 processor and an AP6335 module with an external antenna.


Throughput in MB/s

OK, so that’s quite disappointing as 802.11ac is much slower than 802.11n… The 5GHz connection was initially set with a speed of 433Mbps (as reported in Android Settings), but it fell to 117 Mbps after a while. Orion R28 Meta has an external Wi-Fi antenna, but for some reasons the signal is not “Excellent” but only “Fair”, almost like if there’s a bad contact with the external antenna.

Let’s move to HPH NT-V6, another media player based on Rockchip RK3288 processor with AP6335 module, to see if performance is any better.


Throughput in MB/s

Performance in underwhelming again. The 802.11ac is connected at 292 Mbps, and the results are a bit better than Orion R28, but it’s not the real picture as I discarded one of the transfer which dropped to around 10 KB/s over a 17 Mbps connection. You may wonder why there’s no result with 802.11n using TL-WDR7500. The reason is simple: two of the three transfer were very slow and even stalled at times, so I canceled them. The transfer that went through took 3 minutes 50 seconds with an average of 1.20 MB/s… The connection was more stable with my older router @ 1.92 MB/s, a very average score among Android mini PCs, as the best device

The best device I’ve tested can reach 3.84 MB/s on average with 802.11n, so it’s clear disappointing that I haven’t been able to go faster with any of the devices I’ve tested over 802.11ac. Having said that it’s very difficult to draw a conclusion regards the performance of either TL-WDR7500 router, and the two Android TV boxes because I don’t have a reference platform that’s known to work properly that could help pinpoint the bottleneck in these tests. But at least I’ve learned that 802.11ac does not always beats 802.11n.

USB Mass Storage and Gigabit Ethernet

To complete my review, I connected a USB 3.0 hard drive to one of the USB 2.0 port on the back of the router to test both USB transfer speed, and Gigabit Ethernet. Normally I get about 30 MB/s transfer rate if my drive is connected to USB 2.0, but I only got 7.3 MB/s over a SAMBA connection, and quickly realized the LED on my Gigabit Ethernet switch (D-Link DGS-1005A) indicated a Fast Ethernet connection with the router… The Cat5e cable between the router and the switch is is 15 meter long, so I thought maybe it could be an issue. I brought my router closer to try several cables and I could get a Gigabit connection with some, but not all. Again, I can’t be sure 100% of the reason for this issue, but based on experience I’d tend to think the problem is related to with Gigabit switch, which has been picky with other devices too.

Gigabit Ethernet has been introduced in 1999, so I was naively thinking after 15 years it should just work with no problem, but actual testing showed it was not the case…

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Review of EM6Q-MXQ Android Quad Core Media Player

September 23rd, 2014 7 comments

After taking a few pictures of Eny EM6Q-MXQ Android media player, it’s time for a full review. I’ll first give my first impressions and go through the user interface, test video playback, test the system, network, and storage performance, try a few games, and check various hardware ports are working as they are supposed to do.

First Boot, Settings and First Impressions

I’ve inserted two AAA batteries in the provided infrared remote control to check it’s working, and it’s usable in the main user interface and XBMC, but once you start using most Android apps it’s useless, so I quickly switched to  Mele F10 Deluxe air mouse. Before powering up the device, I’ve connected an HDMI cable, an Ethernet cable, and made with use of the 4 USB ports by connecting two RF dongles (Air mouse and gamepad), a USB hard drive, and a UVC USB webcam. The box lacks a power button, so it starts as soon as you connect the power supply. The boot is pretty slow as it completes in about 1 minute 50 seconds…

EM6Q-MXQ Launcher (Click for Original Size)

EM6Q-MXQ Launcher (Click for Original Size)

The user intefaface is exactly the same as found in Amlogic S802 TV boxes such as M8 and Vega S89. With some big icons that are folders for apps, and a link to a custom Setting menu, and there’s a customizable shortcut bar at the bottom with smaller icons. The status bar is disabled by default, but I prefer to have it when using it with an air mouse, so I restored it via the Setting menu. The first boot, the resolution was automatically detected to 720p, but I changed that to 1080p60, and the resolution is indeed 1920×1080.

The “Setting” menu provides access a Metro-style interface for settings with four sub menus: Network, Display, Advanced and Other.

  • Network – Enable and configure Wi-Fi or Ethernet
  • Display:
    • Automatic or manual HDMI resolution: 480p/i @ 60 Hz, 576p/i @ 50 Hz, 720p @ 50/60 Hz, 1080i @ 50/60 Hz, or 1080p @ 50/60 Hz
    • CVBS Mode Setting: 480 CVBS or 576 CVBS (if Composite output selected on TV).
    • Hide or Show status bar
    • Display Position
    • Screen Save (Never, 4, 8 or 12 minutes)
  • Advanced:
    • Miracast
    • Remote Control (app)
    • CEC Control
    • Location for weather(Chinese cities only)
    • Screen Orientation settings
    • Digital Audio Output (Auto, PCM, S/PDIF pass-through, or HDMI pass-through)
  • Other – System Update: Local file or OTA (not working), Backup, and “More Settings” for standard  Android Settings.

I’ve tested the device using HDMI set to 1080p60 most of the time, but there’s also an AV port for connect to the composite input and RCA stereo audio port of older TVs, and it worked just fine for 480 CVBS and 576 CVBS settings.. Component (YPbPr) output however is not supported.

You can watch a video with the user interface walk-through, XBMC user interface, and H.265 video playback in MX Player.

In the standard Android Settings, About_MediaBox_hd18qEM6Q-MXQ’s 8GB NAND flash has a single partition (5.26 GB) with 4.95 GB free for both apps and data. The “About MediaBox” section indicates the model number as “hd18q″, that happens to be the name of the board, and the system runs Android 4.4.2 on top of Linux kernel 3.10.33. Root Checker confirmed the firmware is rooted. which can be convenient if you don’t have the right cable for the full-size USB OTG port on the device. The company gave me a link to the firmware (September 3), which brings peace of mind in case something goes wrong.

I could install all apps I tried with Google Play Store including Antutu, 3D Marks, ES File Explorer, MX Player, Beach Buggy Blitz, etc…  I did not try paid apps, as the only one I have requires Bluetooth, that’s not built-in into the device. I could also install Riptide GP2 via Amazon AppStore.

There’s no power button on the device, and the remote control only allows you to enter and leave standby mode, so the only way to actually power off the device is to disconnect the power adapter. The latest ARM based mini PCs powered by Amlogic S802 and Rockchip RK3288 get pretty hot, but as expected with a Cortex A5 processor, the temperature is pretty much under control. I measured 39°C and 51°C with an infrared thermometer respectively on the top and bottom of the box, right after running Android 5 benchmark. After playing Riptide GP2 for 20 minutes at 1080p, and a few hours of usage previously,  the maximum temperature on top and bottom reached 42°C and 65°C…

The system itself is very stable, and it only freezes when I try to play a 4K video in XBMC (100% reproducible). However, apps often exit for no obvious reasons. which in theory, could be some bugs within the apps themselves, but it happens a bit too often to my liking… Amlogic S805 is not designed to be the fastest processor around, but while the box runs smoothly most of the times, at other times the box is really sluggish, and becomes frustrating to use. It’s probably not because of the processor, but rather the NAND flash with poor performance, resulting on slow loading times (Close to 2 minutes boot time, XBMC loads in 12 seconds), and in a few instances, I’ve experience very high CPU usage (e.g. 10) with the blue bar (I/O interrupt time) taking most of the load. This compares to 20 seconds boot time, and 2 seconds XBMC start time on recent RK3288 devices with an eMMC. During high load, it may take over 5 seconds to reach the launcher after pressing the Home key of the remote, compared to virtually instantaneous access when there’s no I/O activity.

Video Playback

I played videos from a SAMBA share over Ethernet using XBMC, only switching to MX Player in case of issues. At first, I had some permissions issues connecting to a specific shared folder in XBMC, but eventually I could connect to SAMBA with both XBMC and ES File Explorer,

I started with videos from, H.265/HEVC videos by Elecard, as well as a new VP9 video:

  • H.264 codec / MP4 container (Big Buck Bunny), 480p/720p/1080p – OK
  • MPEG2 codec / MPG container, 480p/720p/1080p – OK, but there’s a regular blinking effect (about 1sec) in  some scenes, especially visible with the grass and trees. The same issue happens in many devices.
  • MPEG4 codec, AVI container 480p/720p/1080p – OK
  • VC1 codec (WMV), 480p/720p/1080p – OK
  • Real Media (RMVB) – RV8, RV9, and RV10 – OK but not that smooth (S/W decode)
  • WebM / VP8 – 480p/720p OK, 1080p plays in slow motion
  • H.265 codec / MPEG TS container
    • XBMC – Audio only
    • MX Player – OK (H/W decode), but if you jump to another time in the video it will switch to S/W decode. Probably a bug in MX Player.
  • WebM / VP9 (no audio in video)
    • XBMC – Won’t even start
    • MX Player – OK (H/W decode).

Once I mostly lost control with the keys in XBMC, and I could only use the mouse pointer and the OK button. Same result with Mele F10 Deluxe or the included IR remote control. Restarting XBMC fixed the issue.

Now some higher bitrate videos:

  • ED_HD.avi – XBMC: audio only; MX Player: black screen only, no audio.
  • big_buck_bunny_1080p_surround.avi (1080p H.264 – 12 Mbps) – OK.
  • h264_1080p_hp_4.1_40mbps_birds.mkv (40 Mbps) – OK
  • hddvd_demo_17.5Mbps_1080p_VC1.mkv (17.5Mbps) – OK, but could be smoother, and XBMC reports skipped frames regularly.
  • Jellyfish-120-Mbps.mkv (120 Mbps video without audio) – OK (Play from USB hard drive)

High definition audio codec could be decoded (PCM output) in XBMC, but performance could be better:

  • AC3 – OK
  • Dolby Digital 5.1 / 7.1 – OK
  • TrueHD 5.1 – OK &
  • True HD 7.1 – Some audio cuts playing from SAMBA, OK from USB hard drive
  • DTS-MA – OK
  • DTS-HR – SAMBA: Audio completely cuts after a few seconds. USB: No problem with audio, but video feels slow.

Sintel-Bluray.iso video could play in XBMC, meaning Blu-ray ISO files are supported.

I also played some AVI, MKV, FLV, VOB and MP4 videos in my library. They could all play, and I did not notice any A/V sync issues, or other obvious problems with playback. I also tested XBMC stability by playing a complete 1080p video (1h50). Sometimes XBMC refuses to exit immediately, and I need to press the “Home” button to get the the main menu. This must be an XBMC issue, as I’ve had this problem in some other devices previously.

Links to various video samples used in this review and be found in “Where to get video, audio and images samples” post and comments.

Network Performance (Wi-Fi and Ethernet)

In order to test network performance, I simply transfer a 278 MB file between a SAMBA share (Ubuntu 14.04) and the internal flash, and vice versa, repeating the test three times with ES File Explorer. I left the Ethernet connected when I first tested Wi-Fi performance, and with the numbers I got during transfer, I decided to disconnect the Ethernet cable to make it was not done over Ethernet, as throughput peaked at up 5.0MB/s, whereas I’m usually lucky to see 3MB/s for most other devices. But this was all real, and when it comes with Wi-Fi performance, EM6Q-MXQ is truly amazing, and crushes the competition with an average throughput of 3.84 MB/s.


Wi-Fi Performance in MB/s

I wonder if the internal Wi-Fi antenna connection to a stainless steel plate inside the case has anything to do with it.

Ethernet worked fine @ 100Mbps even connected to my pesky Gigabit switch.

EM6Q-MXQ_Ethernet_PerformanceI’ve also tested Ethernet performance with iPerf app to get a raw number using “iperf -t 60 -c -d” command line. It does not max out the Ethernet bandwidth but I suppose the results are still decent, even though not outstanding. As reference, Kingnovel R6 achieved over 90 Mbits/sec in both directions via a Fast Ethernet switch.

Client connecting to, TCP port 5001
TCP window size:  136 KByte (default)
[  6] local port 47764 connected with port 5001
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-60.0 sec   570 MBytes  79.7 Mbits/sec
[  6]  0.0-60.0 sec   484 MBytes  67.7 Mbits/sec

Miscellaneous Tests


EM6Q-MXQ does not support Bluetooth, at least the model I have, does not.


FAT32 formatted micro SD card and USB flash drive could be recognized and properly mounted by the system
I’ve also connected my USB 3.0 hard drive, and only NTFS and FAT32 could be mounted automatically, as for some reasons EXT-4 does not seems to be supported by Android.

File System Read Write
EXT-4 Not mounted Not mounted
BTRFS Not mounted Not mounted

I’ve run A1 SD Bench  to benchmark performance of the USB hard drive and internal flash, starting with the NTFS partition in /storage/external_storage/sda1. The read speed was 30.35MB/s, and the write speed of 31.79MB/s, both of which are the best readings I’ve ever got, but only marginally better than the competition. We should probably expect very little variability between devices using USB 2.0, and see some performance boost and more variability with devices that support USB 3.0.

USB Hard Drive Throughput in MB/s

USB Hard Drive Throughput in MB/s

A slow internal storage can make a device behave very poorly, especially during write operation, and unfortunately the NAND flash used cripples a device that would otherwise be a pretty decent product.

Internal Storage Read and Write Speed (MB/s)

Internal Storage Read and Write Speed (MB/s)

This confirms the NAND flash is the likely cause of slow boot time, and apps loading times, as well as temporary, but annoying, slowdowns when flash is written to, for example while installing apps.

USB Webcam

My USB webcam with built-in microphone worked with Skype. I could test audio successfully with the Echo service in Skype, and I could see the video from the camera while making a call. Google Hangouts could detect the webcam, I could start a video call (ringing), and the webcam image was displayed albeit at a very slow framerate (1 or 2 fps), but after a few seconds massive colorful artifacts started to show up.

The Android camera is pre-installed, and I could take a few shots, and record a video.


As usual, I’ve tested Candy Crush Saga, Beach Buggy Blitz, and Riptide GP2. I played Candy Crush Saga with my air mouse, and at the beginning audio cut due to I/O interrupts (kswapd0, irq/60-sdio processes), and logging into Facebook was sluggish as hell, but once actually playing the game, everything worked pretty well, and smoothly.

I played the two other games with Tronsmart Mars G01 wireless gamepad. Beach Buggy Blitz just as smooth as more recent processors (S802, RK3288) with default setting,s but when I maxed out the graphics settings, it was still very playable, but the framerate was impacted. Riptide GP2 was playable, but not perfectly smooth, actually not that much different from Amlogic S802. Decreasing the graphics quality improves playability (frame rate). I’ve raced on several circuits, and after the third circuits, I noticed the 3D image froze once. Playing a fourth games, it was clear I had the same problem as with Amlogic S802 (Probox2 EX), where the 3D image with just stop for a few seconds, before resuming, stop again and so on, but the 2D graphics (position on track) will still render properly and continuously.  So I checked the temperature and I got 42°C and 65°C on the top and bottom of the enclosure. I could be Mali-450MP GPU overheats due to the workload of this specific game, and does not work properly.

EM6Q-MXQ / Amlogic S802 Benchmarks

Since it’s the first device with Amlogic S802, I had to run CPU-Z.

Amlogic_S802_CPU-ZThe app correctly detect a quad core Cortex A5 @ 1.49 GHz with a Mali-450 MP GPU. The scaling governor is set to performance which explains why the cores’ frequency is set to 1488 MHz, as the developers preferred to give full performance to the system, since there’s no overheating issues. The screen resolution is set to 1920×1008 (not 1080 because I enabled the status bar on) with 1280×672 resolution in dp. 825 MB RAM is available to the system, and 5.26 GB internal storage as mentioned previously.


The device gets 16,647 points in Antutu 5.1, and is right at the bottom of the scale in the graphics chart. For reference RK3188 based device usually have a score just above 20,000, so I suppose this score is to be expected because of the slower CPU cores, and despite the faster GPU.  I’ll make a side-by-side comparison with Amlogic S802 in a separate post.

EM6Q-MXQ got 3985 points in Quadrant, close to the score of Asus Transformer Pad (TF201) tablet based on Nvidia Tegra 3.

Quadrant Score (Click to Enlarge)

Quadrant Score (Click to Enlarge)

I’ve also run Vellamo 3.x which shows a performance similar to Samsung Galaxy S3 smartphone (Exynos 4).

Vellamo_Amlogic_S805_EM6Q-MXQFor comparison with other devices, you can download Metal, Multicore, and Browser comparison charts.

Ice Storm Extreme test in 3DMark really shows the lower performance of the quad core Mali-450MP GPU used in S805 (Mali-450 MP2?) against something like Mali-T764 found in RK3288 SoC that gets a score three times higher. I haven’t tested Amlogic S802 with an eight core Mali-450 MP6 GPU yet.

3DMarks ICE Storm  Ultimate (Click to Enlarge)

3DMarks ICE Storm Ultimate (Click to Enlarge)


EM6Q-MXQ could really have been a low cost device with pretty good performance, where it not for the subpar NAND flash used in this hardware. Wi-Fi is the best I’ve ever seen, and by a large margin, video decoding is pretty good, although H.265 is still not supported in XBMC, and the firmware is stable, despite apps exiting randomly at times, but I wonder if it’s related to the I/O performance, and the app are just killed because the system does not respond fast enough.


  • Best Wi-Fi performance I’ve ever experienced in a TV box, and by a wide margin.
  • The system is rather stable, and only hung once when trying to play a 4K video
  • Both 720p and 1080p user interfaces are supported
  • Decent video playback capabilities.
  • HEVC hardware video decoding support. Working in MX Player, but not with XBMC (yet)
  • Webcam supported in Skype (but the image was garbled in Google Hangouts)
  • 4x USB 2.0 host port available


  • Very slow internal storage, leading to severe slowdowns especially while installing apps, or other write operations.
  • Apps may exit suddenly for no reason, maybe related to first point above.
  • Slow boot time, and apps loading times, most probably related to first point above
  • No proper power off (standby only)
  • Lack of Bluetooth support (No Bluetooth module)
  • No option for 24Hz, 25Hz, 30Hz video output

Eny Technology EM6Q-MXQ can be purchased on Aliexpress for about $70 including shipping. In that link, bothEM6Q-MXQ and MXQ S85 are listed so you’ll need to check the USB port (4x port with EM6Q-MXQ only), and/or the Red MX stripe found in S85 version. Resellers can visit EM6Q-MXQ product page to contact the company for larger orders.

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Unboxing of Nagrace HPH NT-V6 Android TV Box with HDMI In, Rockchip RK3288 Processor

September 22nd, 2014 22 comments

Thanks to Nagrace Times Technology, I’ve got a new Rockchip RK3288 Android mini PC to play with. HPH NT-V6 model is higher end compared to the other ones I’ve received including Uyesee G1H, Kingnovel R6 and Orion R28 Meta, because it comes with 32GB eMMC, HDMI In, and a AP6335 Wi-Fi module providing 802.11ac Wi-Fi connectivity. I’ll start by listing the device specifications, take some pictures of the device and the board, and I’ll write a full review probably next week as I have some other hardware to test first.

Nagrace NT-V6 specifications

The company provides various memory and storage options for this product, and if Linux based operating systems such as Ubuntu or Chrome OS end up being properly supported on Rockchip RK3288, Nagrace NT-V6 could end up bring a very nice mini PC:

  • SoC –  Rockchip RK3288 quad core ARM Cortex A12/A17 processor @ 1.8 GHz with ARM Mali-T764 quad-core 3D GPU with support for OpenGL ES 1.1/2.0/3.0, OpenVG 1.1, OpenCL 1.1, RenderScript, and DirectX11
  • System Memory – 2GB DDR3 (Optional 4GB DDR3)
  • Storage – 8GB flash (16, 32, and 64GB optional) + micro SD slot
  • Video Output / Input
    • HDMI 2.0 output up to 4K @ 60fps
    • AV output (3.5 mm jack)
    • HDMI 1.4 Input up to 1080p60
  • Audio Output – HDMI,  AV, and optical S/PDIF
  • Connectivity – Gigabit Ethernet, dual band 802.11 b/g/n and 802.11ac Wi-Fi with external antenna, and Bluetooth 4.0 (AP6335 module)
  • USB – 2x USB 2.0 host ports, 1x Micro USB OTG
  • Camera – 5M auto focus (optional, not included in sample I’ve received)
  • Misc – Power button and LED, IR receiver, recovery button
  • Power Supply – 5V/3A
  • Dimensions –  115 x 115 x 23 mm (excluding Wi-Fi antenna)
  • Weight – 250 grams

HPH NT-V6 runs Android 4.4, like most of the the boxes currently on the market.

NT-V6 Unboxing Pictures

The company sent me the box via DHL, and the media player can be found in the package below. The back of the package lists options for 2 or 4 GB RAM, and 8, 16, 32 or 64 GB flash, so there will most certainly be an option for 4GB RAM and 64GB (eMMC) flash.
An HDMI cable (1 meter), an IR remote control requiring two AAA batteries (not included). a Wi-Fi antenna, a 5V/3A power supply, a user’s manual, and an enclosure protection film can be found in the package together with the box.

Nagrace NT-V6 and Accessories (Click to Enlarge)

Nagrace NT-V6 and Accessories (Click to Enlarge)

There’s nothing on the front of the device (where the power LED and IR receiver are located), a power button and antenna connector can be found on one side, AV output, a recovery button, a micro SD slot, a full-size USB OTG port, and HDMI IN are located on the other side, and the rear panel comes with the following ports: Gigabit Ethernet, two USB 2.0 host ports, HDMI 2.0 output, optical S/PDIF, and a DC power barrel.

Nagrace NT-V (Click to Enlarge)

Nagrace NT-V (Click to Enlarge)

The top of the case is a fingerprint magnet which may be why a protective film has been included.

You can also watch the unboxing video if you please.

 HPH NT-V6 Board

Let’s open the box to see what’s inside. There aren’t any screw holding both parts of the case together, but you’ll find a small opening between the gray and black parts just below the USB OTG port, where you can insert a flat-headed precision screwdriver to start popping out the bottom of the enclosure.

Bottom of NT-V6 Board (Click to Enlarge)

Bottom of NT-V6 Board (Click to Enlarge)

The board name is TRN6A V10, and it looks like I may have received the version with 4GB RAM and 32 GB eMMC based on markings on the sticker. You’ll also find ribbon connectors on the bottom left of the photo, probably for the camera interface, and maybe LVDS? You need to remove four screws to completely take out the board from its case.

NT-V6 Board (Click to Enlarge)

NT-V6 Board (Click to Enlarge)

Again, a stainless place is screwed on the top of the enclosure for power dissipation reasons, but I’m not sure how efficient that is.  There’s also a heatsink, a bit larger than in the other RK3288 boxes, on top of the quad core SoC and the RAM chips. I have not dared to unglue it before testing the device. The wireless module is indeed AP6335 for 802.11 b/g/n, 802.11ac, and Bluetooth 4.0. Samsung KLMBG4WEBC-B031 is a 32GB eMMC 5.0 flash that can achieve 200MB/s read and 50MB/s write in theory, and there’s another empty emplacement to add another eMMC flash. Just under the flash, there’s another unpopulated connector (mini PCIe?). Lontium LT8641SX is a very recent HDMI 1.4 switch chip that provides up to 3x HDMI 1.4 input channel and 1x HDMI 1.3/ 3 MHL 2.0 input channel, so it’s obviously the chip handling HDMI input here.

That’s all for today for this exciting device. The version with 2GB RAM and 16 GB eMMC is available on Aliexpress for $129 + shipping, and the one with 32GB eMMC/4GB RAM as I received can be purchased for $189 including shipping by DHL or EMS. You may also want to visit Nagrace NT-V6 product page if you want to contact the company to order in quantities.

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Getting Started with LinkIt ONE Development Kit for Wearables & IoT

September 21st, 2014 1 comment

After going through WRTnode Quick Start Guide, it’s now time to play with LinkIt ONE, the IoT development board from Mediatek designed by Seeed Studio. LinkIt ONE is the first Hardware Development Kit (HDK) for Mediatek LinkIt, so there may be a LinkIt TWO, and/or other hardware platforms in the future.

LinkIt ONE specifications

Let’s quickly go through the specifications first:

  • Processor – Mediatek MT2502A (Aster) ARM7 EJ-STM processor @ 260 MHz
  • System Memory – 4 MB
  • Storage – 16MB Flash for firmware + micro SD slot shared with SIM slot for up to 32GB additional storage
  • Connectivity:
    • Wi-Fi – 802.11 b/g/n (MT5931) with external antenna
    • Bluetooth – BR/EDR/BLE(Dual Mode)
    • GPS – Mediatek MT3332 with external antenna
    • GSM/GPRS – 850/900/1800/1900 MHz band, Class 12 GPS with external antenna
  • Audio – 3.5mm headphone jack (including mic support) – Support for MP3, AAC, and AMR codecs.
  • Serial – Software Serial (Serial), and Hardware Serial (Serial1, D0 & D1)
  • Expansion Headers
    • Arduino UNO headers including digital I/Os, 3x analog input, PWM, I2C, SPI, UART3 etc..
    • UART and I2C Seeed Studio Grove interfaces
  • Power
    • 5V via micro USB
    • I/O – DC Current Per I/O pin: 1mA
    • Li-Po Battery Support
  • Dimensions – 8.4 x 5.3 cm

LinkIt ONE Unboxing

I’ve received the kit in a package reading “LinkIt ONE – The Ultimate Development Board for Wearables and Internet of Things”.

LinkIt_ONE_PackageThe back of the package has some explanation about various features and capabilities of the board and two links:

LinkIt ONE, Antennas, and Battery (Click to Enlarge)

LinkIt ONE, Antennas, and Battery (Click to Enlarge)

Beside LinkIt ONE board, the package comes with three antennas (Wi-Fi, GPS, and GPRS), as well as a 1000mASh Li-Po battery.

LinkIt ONE (Click to Enlarge)

LinkIt ONE (Click to Enlarge)

The Grove interface are the two headers just above LinkIt ONE marking with UART and I2C connectivity use to add modules made by Seeed Studio, but you can also connect Arduino shields using the Arduino UNO compatible headers. The board can be powered by the micro USB port on the left, or a battery connected to the connector on the bottom left. Power source is selected by a switch (USB / BAT). The headphone jack (stereo + mic) is located on the top right.

Back of LinkIt ONE Board (Click to Enlarge)

Back of LinkIt ONE Board (Click to Enlarge)

On the back of the board, there’s a SIM/ micro SD card slot combo, and a metallic shield (for EMI) covering the main components, mostly MT2502A, since the SoC integrates memory, MCU, Bluetooth, and the PMU into a single chip. You’ll find the three antenna connectors on the right of the picture.

LinkIt ONE Quick Start Guide

At first I went to to download LinkIt SDK, after registering with Mediatek Labs. You can also optionally download the Hardware Reference Guide with the datasheets for Aster (MT2502A), Wi-Fi (MT5931), and GPS (MT3332) chips, as well as schematics and PCB layout in Eagle format, and high resolution pinout diagram which I reproduced below.

LinkIt ONE Pinout Diagram (Click to Enlarge)

LinkIt ONE Pinout Diagram (Click to Enlarge)

The SDK file is named that contains a file called Mediatek_Linkit_SDK_for_Arduino_1_0_34.exe. Alright, time to start a Windows 7 VM… The Wiki however states that “Arduino IDE for LinkIt ONE supports Windows only. Mac and Linux will be supported in the near future.

At first I failed to install the SDK, but I found I’ve found better resources in LinkIt ONE Wiki, which also links to LinkIt Developer’s Guide, explaining you need to get the Arduino IDE.

So first, you need to retrieve the LinkIt ONE IDE (modified version of Arduino IDE?) from github. There are several methods, but let’s just download the ZIP file (145MB), and extract it. Go to LinkIt-ONE-IDE-Master/drivers/mtk directory, and click on InstallDriver to install the drivers. Now connect the board to your PC with a micro USB to USB cable. If you use VirtualBox, you’ll also need the VirtualBox Extension Pack to access USB devices. In VirtualBox, LinkIt ONE is referred to as “Mediatek Inc Product [0100]” in Devices->USB Devices menu. The installation should complete as follows with two new COM ports.


So now, you can install the the LinkIt SDK, pointing the installation directory to LinkIt IDE directory (LinkIt-ONE-IDE-Master).

LinkIt_SDK_For_Arduino_1.0Click Next a few times to complete the installation,. We don’t really need to install Mediatek USB drivers (last step), as we’ve done that already.

Now start the Arduino IDE by clicking on Arduino(.exe) in LinkIt-ONE-IDE-Master folder, and configure it to use the board by selecting Tools->Board->LinkIt ONE.

Arduino_IDE_LinkIt_ONEYou’ll also need to select the COM port corresponding to MTK USB Debug Port (COM6 in my case) with Tools->Port. Port was grayed out at first, but resetting the board fixed the issue.

The first project you usually try is Blink, that simply blinks an LED on the board. So let’s do it. The procedure is exactly the same as the one followed for an Arduino board. To load the project, click on File->Examples->01. Basics->Blink. Make sure the switch on the left of LinkIt ONE marking on the board is set to SPI, and upload the program by selecting File->Upload or clicking directly on the Upload icon (->). The transfer should complete within a few seconds, and a green LED blink on the board shortly after.

Seeed Studio also sells “Sidekick Basic Kit for LinkIt ONE” with a breadboard, passive components (resistor, capacitor,…), sensors (thermistor Photo resistor ..), a servo, and a buzzer to interface with LinkIt ONE board, and provide a tutorial with 10 examples showing how to use the kit. I haven’t received it, but their “Hello World” tutorial just blinks an external LED, so I’ve tried it out as well with some off-the-shelf components.

LinkIt ONE Hello World (Click to Enlarge)

LinkIt ONE Hello World (Click to Enlarge)

The wiki mentions you can load the program with File->Examples->Starter Kit for LinkIt->Basic->L2_Control_LED, but there’s no Starter Kit for LinkIt entry. Maybe I need to install something else, but I could not find any download links. Nevertheless, the code is included in the wiki, so I just created a new project with the code:

const int pinLED = 3;                      // LED connect to D13
void setup()
  pinMode(pinLED, OUTPUT);                // set direction of D13-OUTPUT
void loop()
  digitalWrite(pinLED, HIGH);             // LED on
  digitalWrite(pinLED, LOW);              // LED off

With I then uploaded to the board, and the LED is lit for 3 seconds, and off for a short time (100ms) as expected.

That’s all for the quick start guide. To go further, you can check the wiki, and developer’s guide mentioned above, and read the LinkIt API Reference for full details of the APIs for MediaTek LinkIt development platform.

LinkIt ONE is available now for $79 on Seeed Studio, and you may also consider pre-ordering “Sidekick Basic kit for LinkIt ONE” for $29.90 (Shipping on October 22) to have some fun interfacing LEDs, sensors, a servo, etc.. to the board, by following the related tutorials.

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Unboxing of Eny EM6Q-MXQ Android TV Box Powered by Amlogic S805 Processor

September 20th, 2014 2 comments

EM6Q-MXQ is an Android TV box based on Amlogic S805 quad core Cortex A5 processor, with a quad core Mali-450MP GPU, 1GB RAM, and 8GB flash. The company sent me a sample for review, so today I’ll start with some pictures, and follow up with a full review in a few days.

EM6Q-MXQ Unboxing Pictures

The box comes with a brand-less “OTT TV BOX” package.

The media player comes with an HDMI cable (1.2m), a remote control requiring two AAA batteries, a 5V/2A power supply, and a user’s manual in English and Chinese.

EM6Q-MXQ and Accessories (Click to Enlarge)

EM6Q-MXQ and Accessories (Click to Enlarge)

The box features an LED and an IR receiver at the front, 3 USB 2.0 ports and an SD card slot on the side, with most ports on the rear panel: another full size USB port (OTG), coaxial S/PDIF, AV output, HDMI output, 10/100M Ethernet, and DC in.

EM6Q-MXQ (Click to Enlarge)

EM6Q-MXQ (Click to Enlarge)

There’s also MAC address on the bottom of the casing starting with C44EAC that looks up to Shenzhen Shiningworth Technology Co., Ltd found in some other Amlogic products.

Unboxing Video:


Opening the device is fairly easy. You first need to stick out the four rubber pad on the bottom of the enclosure, then untighten the four screws, before pulling out the bottom of the case with a flat screw driver:

Bottom of EM6Q-MXQ Board (Click to Enlarge)

Bottom of EM6Q-MXQ Board (Click to Enlarge)

Nothing much to see on the bottom of the board, except the serial console pins close to the USB ports.

EM6Q-MXQ Board and Stainless Plate (Click to Enlarge)

EM6Q-MXQ Board and Stainless Plate (Click to Enlarge)

There are no other screws to remove, simply pull out the board from the enclosure to take it out. There’s a stainless plate attached to the top of the enclosure, but I’m not sure what its purpose exactly is, because it does not touch anything in the case. I’ve also remove the heatsink to get a real look at the board with marking HD18Q_V0.95.

HD18Q Board (Click to Enlarge)

HD18Q Board (Click to Enlarge)

We can get confirmation that USB-4 is indeed a USB OTG port, the recovery button is located right behind the AV output port, and the USB Wi-Fi module is based on Realtek RTL8188ETV. The 8GB eMMC NAND flash is FORESEE NCFSES76-08G, and two RAM chips (NANYA NT5CB256M16CP-01) are used to get 1GB RAM.

Despite the name and enclosure being similar to MXQ S85, both devices are different as one feature optical S/PDIF output, and the other coaxial S/PDIF, and the number of USB ports are different (2x USB + 1x micro USB vs 4x USB). Eny Technology EM6Q-MXQ  can be purchased on Aliexpress for about $70 including shipping (You’ll need to sort between EM6Q-MXQ and MXQ S85 manually by checking the USB port, and/or the Red MX stripe in S85 version). If you are interested in buying in quantities, you can visit EM6Q-MXQ product page to contact the company.

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Getting Started with WRTnode OpenWRT Development Board

September 18th, 2014 No comments

Seeed Studio sent me two nice little boards that can be used for IoT development: WRTNode and LinkIt ONE. Today, I’ll show pictures of WRTNode and accessories, and go through the “starting guide“, and will test LinkIt ONE board a few days later.

WRTnode Unboxing

I’ve received WRTnode by Fedex, and the board is stored in a plastic box.
Inside the box, you’ll find the board, a “special” USB used to power the board and as an OTG adapter, a piece of paper with useful links (Wiki), and some WRTnode stickers.

WRTnode, "special" USB cable, and Quick Start Card (Click to Enlarge)

WRTnode, “special” USB cable, and Quick Start Card (Click to Enlarge)

Any micro USB to USB cable can be used to power the board, but this cable is useless to connect USB devices such as flash drives, webcams (OpenCV is supported), Bluetooth dongles, and so on. You could even connect a USB hub to connect multiple USB devices as shown below.


I’ve also taken a picture of both sides of the board shown the antenna on-board antennas, Mediatek MT7620n WiSoC, Elixir N2TU51216DG-AC DDR2 chip (64MB @ 400 MHz), the 16 MB SPI flash, as well as the headers for connecting various peripherals via I2C, SPI, UART, USB, etc…

WRTnode Board (Click to Enlarge)

WRTnode Board (Click to Enlarge)

You can also add Ethernet easily by making your own Ethernet cable using T568B wiring standard. I’m not 100% sure it’s safe though, as there are usually some extra components for Ethernet. I’ve included the board pinout chart for your reference.


WRTnode Quick Start Guide

To start the board simply connect the USB cable to a power adapter or a USB port on your computer. After about 10 seconds, you should see a blue LED lit up, and shortly after, you should see WRTnodeXXXX ESSID, where XXXX are the last 4 digit of the board MAC address. Connect it with your computer, and input the password: 12345678.
WRTNode_Access_PointNormally the board will resolve as several URL, but at first none of them worked.

$ ping
ping: unknown host
$ ping openwrt.lan
ping: unknown host openwrt.lan
$ ping wrtnode.lan
ping: unknown host wrtnode.lan

But you can check the route to see which subnet is used by your Wi-Fi connection:

$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default UG 0 0 0 eth0 * U 1 0 0 eth0 * U 9 0 0 wlan0

I could finally ping the board with:

$ ping
PING ( 56(84) bytes of data.
64 bytes from icmp_seq=1 ttl=64 time=12.4 ms
64 bytes from icmp_seq=2 ttl=64 time=2.37 ms
64 bytes from icmp_seq=3 ttl=64 time=12.1 ms

Interestingly, ping openwrt.lan, and the other two URL also work afterwards, so maybe I was a little to impatient during my testing…

The first time you need to connect to the board via telnet in order to set the root password:

$ telnet


Now change the root password using passwd as you would do in any other Linux machine, and exit the connection, in order to connect via SSH instead:

$ ssh [email protected]
The authenticity of host ' (' can't be established.
RSA key fingerprint is bc:00:71:ac:b1:56:e7:7b:c7:7a:9b:6a:59:8e:da:82.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '' (RSA) to the list of known hosts.
[email protected]'s password:
BusyBox v1.22.1 (2014-08-13 19:31:12 UTC) built-in shell (ash)

At this point, you’ve got another Wi-Fi access point on your network, but it’s not connected to Internet, so let’s start by locating the Wi-Fi routers with aps command:

root@OpenWrt:~# aps
WRTnode AP scaner.
Begin scaning APs, pls wait...
APs available are...
ra0 get_site_survey:
Ch SSID BSSID Security Siganl(%)W-Mode ExtCH NT WPS DPID

I only have one ESSID here, but this will list all ESSID in your environment. With that data, you can configure WRTnode to connect to your Wi-Fi router using vw command (vi wireless?):

root@OpenWrt:~# vw
config wifi-device 'ra0'
 option type 'ralink'
 option mode '9'
 option channel '1'
 option txpower '100'
 option ht '20+40'
 option country 'US'
 option disabled '0'
config wifi-iface
 option device 'ra0'
 option network 'lan'
 option mode 'ap'
 option encryption 'psk2'
 option key '12345678'
 option ApCliEnable '1'
 option ApCliSsid 'CNX-TRANSLATION'
 option ApCliAuthMode 'WPA2PSK'
 option ApCliEncrypType 'AES'
 option ApCliPassWord 'router_password'
 option ssid 'WRTnode9A60'

You need to change the lines in bold above using the data from aps. The first line is the Channel (Ch) , and the four lines in the wifi-iface section are pretty much self-explanatory. Save the file with Esc + “:wq”.

aps and vw do not report security features in the same way. Here’s the conversion table in case you don’t use WPA2PSK/AES:

aps:Security           vw:ApCliAuthMode/ApCliEncrypType

Finally, restart the network:

root@OpenWrt:~# nr

and verify WRTnode got an IP address from the Wi-Fi router using DHCP:

root@OpenWrt:~# ia
apcli0 Link encap:Ethernet HWaddr 66:51:7E:32:9A:60
inet addr: Bcast: Mask:
inet6 addr: fe80::6451:7eff:fe32:9a60/64 Scope:Link
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

Good is an IP adress from local network. Let’s also check we can ping a site on the Internet:

root@OpenWrt:~# ping
PING ( 56 data bytes
64 bytes from seq=0 ttl=53 time=81.999 ms
64 bytes from seq=1 ttl=53 time=87.759 ms
64 bytes from seq=2 ttl=53 time=81.381 ms
--- ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 81.381/83.713/87.759 ms

All good!

Once I had a problem connecting to my Wi-Fi router, and it turned out my router was configured to automatically select the channel, and it had switched to Channel 4. Running vw again to change the configuration withoption channel ‘4’” made the connection work again. There’s probably an option in OpenWRT to automatically detect the channel, but I haven’t investigated.

You can also install packages for okpg. I tried to install luci, but it was pre-installed, so I added openvpn support instead:

root@OpenWrt:~# opkg update
Updated list of available packages in /var/opkg-lists/barrier_breaker.
root@OpenWrt:~# opkg install luci
Package luci (svn-r10457-1) installed in root is up to date.
root@OpenWrt:~# opkg install openvpn-easy-rsa
Installing openvpn-easy-rsa (2013-01-30-2) to root...
Installing openssl-util (1.0.1h-1) to root...
Configuring openssl-util.
Configuring openvpn-easy-rsa.

That’s it the quick start guide is completed.

I’ve also run some command to show memory and storage usage:

root@OpenWrt:~# df -h
Filesystem Size Used Available Use% Mounted on
rootfs 7.3M 348.0K 7.0M 5% /
/dev/root 7.5M 7.5M 0 100% /rom
tmpfs 30.2M 80.0K 30.1M 0% /tmp
/dev/mtdblock5 7.3M 348.0K 7.0M 5% /overlay
overlayfs:/overlay 7.3M 348.0K 7.0M 5% /
tmpfs 512.0K 0 512.0K 0% /dev

root@OpenWrt:~# free -m
total used free shared buffers
Mem: 61852 29084 32768 0 3536
-/+ buffers: 25548 36304
Swap: 0 0 0

Out of the 16Mb SPI flash, only 7.3M available are available for OpenWRT, the  rest is probably used by the bootloader. There’s nearly 64MB RAM available, and 29MB free.

If you are interested in the board, you can purchase it from Seeed Studio ($25), which provided the board for this review, but it’s also available on other shops such as DFRobot or Eleduino for the same price, although shipping fees may vary. To go beyond this Quick Start Guide, visit WRTnode WiKi to access the source code, schematics, and various documentation including tutorials.

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