I'm using the BeagleBone Black as the platform for my GoBalloon [1] project. Overall, it's awesome: the GPIO and UART ports work as expected. One major annoya

I'm using the BeagleBone Black as the platform for my GoBalloon [1] project. Overall, it's awesome: the GPIO and UART ports work as expected. One major annoyance, however, is the lack of easy-to-use DC input current sensor. For my battery-powered project, I want to be able to monitor the supply voltage that the BBB is getting. I want to read this value in software so I can do things like reduce the telemetry transmission rate if the battery starts to run low. I also want to log the supply voltage so that I can compare the performance of different battery technologies on subsequent flights. I was chatting with the folks on freenode:#highaltitude and it turns out there is a way to do this, but it involves soldering jumper wires onto pins of the BBB's Power Management Controller and pulling resistors off the PCB. Yuck. I decided to use a INA219 on my custom cape instead. Hacky. Thanks for the writeup on the device tree overlays. That's going to be super useful for me. [1] https://github.com/chrissnell/GoBalloon https://github.com/chrissnell/GoBalloon