usb News - Page 21 of 26 - CNX Software

April 27, 2017April 28, 2017 by Jean-Luc Aufranc (CNXSoft) - 15 Comments

Selecting a Micro USB Cable to Power Development Boards or Charge Phones

Yesterday one person contacted me on Facebook asking me whether there was any chance of me doing a “which usd-micro usb cable is best”, as there’s not much clear information on the Internet. His purpose was to charge his phone, but many development boards come with a micro USB port, and I’ve read many comments about powering the board. It also happened to me, and the main cause can either be the power supply which does not work as rated (usually 5V/2A), or the micro USB cable which may have a resistance a little to high leading to voltage drops. You’ll know you may have a power problem when the board refuses to boot, and usually boot loop, or randomly reboots especially under high load. The first solution is to get a power supply that provide the right voltage and amperage, and you can test that with USB Charger doctor […]

April 8, 2017April 8, 2017 by Jean-Luc Aufranc (CNXSoft) - 8 Comments

Cambrionix PowerPad 15S is a 15-Port USB Hub with 2.1A Output, Control API, Serial Console, Power Consumption Monitoring

Many development boards are powered over USB, usually via a micro USB ports, and if you have one board, you’d just use a 5V USB adapter with the right amperage, and it will work fine as long as you have a low resistance USB cable (AWG20 cables recommended for higher loads). But when you start to running multiple boards using power strips with USB adapter start to take space, so USB hubs are much more convenient. However, you need to find one that delivers enough power, is reliable, and possible allows per port power control. The guys at LAVA (Linaro Automated Validation Architecture) are using a lot of boards to validate software developed by Linaro and their members, with the boards having to run 24/7, and they had various misfortunes with USB hubs, but as Dave Pigott reports they’ve now found that USB hub of their dream with a 15-port […]

April 6, 2017 by Jean-Luc Aufranc (CNXSoft) - 5 Comments

That USB Stick Looks Suspicious! Camera, Microphone and Battery Included.

I had previously read about USB flash drives dropped on the parking with some malware, so that if you pick it up and use it it infects your computer in order to spy on your activity. But I browser new arrivals on DealExtreme, I found another nefarious use case thanks to U8 Mini USB drive / spy camera sold for around $10 shipped. If we look the picture below, it looks just like any other USB flash drives.But once we have a closer look at U8 mini specifications: USB – 1x USB 2.0 male port Storage – micro SD slot up to 32GB (no internal storage) Camera Video up to 720 x 480 @ 25~30fps recording to AVI/M-JPEG Photo up to 1280×1024 in JPG format Audio recording with built-in microphone Misc – Motion detection camera button, power button, picture button, status LED Battery – 300 mAh good for about 60 […]

February 4, 2017March 2, 2017 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Embedded Linux Conference & OpenIoT Summit 2017 Schedule

The Embedded Linux Conference 2017 and the OpenIoT Summit 2017 will take place earlier than last year, on February 20 – 23, 2017 in Portland, Oregon, USA. This will be the 12th year for ELC, where kernel & system developers, userspace developers, and product vendors meet and collaborate. The schedule has been posted on the Linux Foundation website, and whether you’re going to attend or not, it’s always informative to check out the topics. So as usual, I’ll make a virtual schedule for all 5 days. Monday, February 20 For the first day, the selection is easy, as choices are limited, and the official first day it actually on Tuesday. You can either attend a full-day paid training sessions entitled “Building A Low Powered Smart Appliance Workshop“, and the only session that day: 14:30 – 15:20 – Over-the-air (OTA) Software Updates without Downtime or Service Disruption, by Alfred Bratterud, IncludeOS […]

February 3, 2017February 3, 2017 by Jean-Luc Aufranc (CNXSoft) - 7 Comments

Targus Universal DisplayLink Docking Stations Support Up to Six 4K Monitors via a Single USB Cable

USB type C connectors are becoming more and more common and beside transmitting data and power, some devices also support video over USB which requires a dock, and if you have some serious display requirements, Targus docking stations over USB-C or USB 3.0 might be what you are looking for, as they support two 4K monitors at the same time thanks to their multiple HDMI 2.0, DisplayPort 1.2a and DVI outputs, and you can even daisy-chain three docking stations over USB 3.0 type A cables in order to control six 4K monitors from one USB port. Targus has several models, but let’s check out the specifications of their “USB 3.0 DV4K DOCK160USZ dock station” pictured above: Chipset – DisplayLink DL-6950 Video Output Ports – 2x HDMI 2.0 ports, 2x DisplayPort 1.2a ports supporting up to dual 4K Ultra HD video @ 4096×2160 60Hz 24 bpp Audio – 1x 3.5 mm […]

January 29, 2017October 8, 2022 by Jean-Luc Aufranc (CNXSoft) - 13 Comments

Satechi USB Type-C Power Meter Measures up to 65 Watts

CHARGER Doctor is a popular USB power meter for USB 2.0 ports that can help you check whether your charger delivers the promised amperage, and if you are dealing with USB powered device you can easily measure the power drawn by that device. But we are now in 2017, and USB type C has become more and more popular, and can deliver higher voltages higher than 5V, as well as higher currents. So if you are looking for USB type C power meter, Satechi has you covered. Satechi USB-C power meter key features and specifications: Voltage Range – 4V-20V Current Range – 50mA-10W Max readable Power – 65W Indicates power over time (mAh) and current direction (e.g. charger to laptop, or laptop to phone). USB 3.1 data pass-through supported Dimensions – 6.3 x 2 x 0.8 mm Weight – 8.6 g Beside just measuring power usage, several blogs report this USB-C […]

September 1, 2016September 2, 2016 by Jean-Luc Aufranc (CNXSoft) - 11 Comments

USB Fun – Tiny USB WiFi and Hub Boards and micro USB Hub

I’ve come across a few interesting tiny USB boards and hubs in the last few days, so instead of writing a post for each, I’ve gathered all info into a single article. Small ESP8285 USB Board A couple of weeks ago, CNLohr released his first ESPUSB virtual USB implementation for ESP8266 allowing to use USB with external hardware, barring a resistor, and only two GPIOs. He has now made a tiny board based on ESP8285 with a USB interface leveraging ESPUSB. Hardware files can be found on github. So what can you do with it? CNLohr leveraged the work of the community in order to emulate a keyboard and mouse using a smartphone. The only bit of bad news in the video is that finally USB full speed (12 Mbps) can’t be supported. NanoUSB Hub Board Mux wanted to add more USB devices to its tablets, but there was none […]

August 8, 2016August 8, 2016 by Jean-Luc Aufranc (CNXSoft) - 5 Comments

ESP8266 Gets USB Support Thanks to ESPUSB Software Stack

Neither ESP8266 nor ESP32 support USB, so what am I babbling about? No, ESP8622 did not suddenly grow a USB PHY, but cnlohr decided to implement virtual USB support using two GPIOs (12 & 13) for the D+/D- USB signals, meaning you can connect any ESP8266 module through USB, or even update the firmware through USB without external hardware, apart from a single extra resistor. The source code is available on espusb repo on github. Please note that the code is currently work in progress, and USB implementation currently only works at 1.5 Mbit/s, with potentially future support for 12 Mbit/s. That’s the demo, and an explanation about the design process. Jean-Luc Aufranc (CNXSoft)Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011. www.cnx-software.com