We have created an alternative bootloader to load apps stored on an SD card. A double tap of the reset button activates the bootloader. Use the 3/UP, 4/DN and 5/YES buttons to select the app.
Here is a short video demo:
Documentation page is HERE
We have ordered extra boards from Elecrow, so you are most welcome to place pre-orders for more ;)
Exquisite printed circuit boards that bring to life Forrest Mims' vintage designs from "Getting Started in Electronics."
Multi-sensor data acquisition, processing, and Wi-Fi/Bluetooth communication in a single, open source board. Sense anything.
A range of tiny, low-cost, well-supported, and open FPGA dev boards