GSM Phone Kit

Based on Ai-thinker's A9 module, this consists of two boards.

1. The A9 core board
2. Keypad/display daughter board

The A9 core board is a raspberry pi compatible board that can sit on top a raspberry pi but can also be a micropython-based microcontroller board on its own, The two modes of operations requires different firmware of course.

When used as a phone, it comes with a simple python code that implements basic phone functionality. This code can be modified by connecting the board to a PC through the usb connector, provided on the board.