This is an example project for M5Stamp C3U on PlatformIO

Project forked to explore how to use this board.

Work in progress:

• [x] Setup things with Arduino IDE 1.8.19, boards and lib.
  Here on Master branch.
• [x] Understand how to communicate with I2C,
  Check branch I2Cscan
• [x] Play with a Oled .096 display and the ENV unit DHT11,
  Check branch OledDHT11
• [x] Expand GPIO with MCP23017 and I2C.
  Check branch mcp23017
• [x] Then go back to setup the board in platform.io,
  Here on Master branch.
• [ ] connect and log data with the "data logger shield for WIFI D1 MINI"
• [ ] measuring of State of a battery (V) and power form solar pannel (A)
• [ ] return the tilt values from ADXL345 on a graph with web server.

Notes:

Pay attention to the model you have.

• C3 need a FTDI driver
• C3U doesn't but need to be in program download mode.

For more stuff, check the issue #1

- To use with Arduino IDE

https://docs.espressif.com/projects/arduino-esp32/en/latest/installing.html#installing-using-arduino-ide

- To use with Platform.io

Clone this repo, everything is adjusted in platformio.ini
Just build and upload

- Test program

main.cpp : Internal led will change its color with each press on the button.

For ARDUINO IDE: You can copy/paste the code from main.cpp Don't forget to install libraries.

- To enter into "program download" mode operation:

• Long press the center button (G9) of STAMP C3U under power failure condition.
• Connect USB to the computer while holding the button,

after that, the port is successfully identified, program burning.

Windows 10, Arduino IDE

Manjaro kernel 5.15 LTS, Arduino IDE