WRTNode is a Hacker-Friendly Open Source Hardware OpenWRT Wi-Fi Module Selling for $25

There are now some tiny and low cost ($15 to $20) Wi-Fi modules supporting OpenWRT such as VoCore and AsiaRF AWM002. However due to their small size they may not be that hacker’s friendly as they can’t have 2.54mm headers due to heir small size, and I’ve recently received AsiaRF AWM002 only to find out it not only needs 3.3V supply voltage, but also 1.8V and 1.2V. So I’d need to make my own power circuit with the required LDOs, or purchase a $20 base board to use the module. Here comes WRTnode another larger Wi-Fi module but with more usable 2.54mm headers, and based on the more powerful Mediatek MT7620N processor @ 600MHz.

WRTnodeWRTnode hardware specifications:

  • Processor – Mediatek  MT7620N 600MHz MIPS CPU (MIPS24KEc)
  • System Memory – 64MB DDR2
  • Storage – 16MB SPI flash
  • Connectivity – Wi-Fi 2T2R 802.11n 2.4 GHz up to 300Mbps
  • Expansion Headers – 2x with access to  23GPIOs, JTAG, SPI, UART Lite, USB2.0 host
  • USB – 1x micro USB
  • Dimensions – 45mm x 50mm

OpenWRT is based on BARRIER BREAKER release with various patches (opencv 2.4.8, linino, …), demos (opencv, mechanical control, and RESTful), and source code available on github. The project also claims to “open hardware”, but for now they’ve only released the schematics (PDF), with the BoM and PCB layout being released layer. The board has apparently been designed by a company called DFRobot (TBC), and robotics projects and shields are planned for WRTnode, and “WRTnode IoT development framework SDK” will be released at a later stage with a graphical IDE, “enhanced AI algorithms”, RESTful, and more.

You can watch a demo with WRTnode running OpenCV and controlling uARM robotic arm to pickup coins, and move them into a cup.

They have already sold a few beta boards in China, but the module is not currently available for purchase, but it will sell for $25+ shipping on DFrobots, SeeedStudio, and a few other sites. You can find more information on WRTnode website.

Via Olof Johansson

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CNXSoft – Embedded Systems News » Black Swift is a Tiny OpenWRT Wi-Fi Board Powered by Atheros AR9331 (Crowdfunding)Bill ZhuonebirohmohmGetting Started with WRTnode OpenWRT Development Board Recent comment authors
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A module may not be the best approach for hacking with these chips. By their very nature modules are not complete systems. You will have to build a bunch of support circuitry around them.

A complete board like this might be better for hacking….
http://www.asiarf.com/IoT-Home-Automation-Sever-WiFi-11n-MT7620-High-Speed-Multi-Functions-Router-Board-AP2620-P-product-view-388.html

That board includes the power supply and Ethernet connectors. Plus it has plenty of connectors to access the other parts of the chip. Only use a module after you get your initial design done and want to make fifty copies of it.

I use Dupont jumpers to bring signals from boards like these over a breadboard.

Member

@cnxsoft The MT7620 IOT board from AsiaRF is $45 Q1.

If you had the tiny baseboard for the AWM002 it would have been much easier for you to use. It takes 5V in and makes the rest.

Tom Cubie
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WRTNode is made by the team from China which i happen to know. DFRobot is the second largest seeed like distributor in China.

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[…] 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 […]

ohmohm
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Bill Zhu
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Bill Zhu

@cnxsoft
There are other models named Nexx WT3020A/WT3020H/WT3020F/WT3020AD.
https://wikidevi.com/wiki/Nexx_WT3020
Differences between WT3020F, WT3020H and WT3020AD are only found in the original firmware.
Chinese website: http://www.nexx.com.cn/index.php

Bill Zhu
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Bill Zhu

@onebir
You can DIY the usb port or just buy the other versions 🙂

BTW:
Nexx WT3020 were offical support by openwrt today.
https://dev.openwrt.org/changeset/42983/

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[…] with Black Swift. The board runs OpenWRT, is a little larger than Vocore, and quite smaller than WRTnode, is powered by Atheros AR9331, provides access to I/Os via headers, and comes with two micro USB […]