Most official Flipper features are implemented. I2C: INA219, MCP23017, OLED (I2C preferred to free SPI). IR (RX/TX) and speaker/vibro outputs work. MCP23017 handles buttons, RGB LED and vibro (pins B1 ...
Other platforms are not officially supported yet; you can try installing your own arduino-cli and pointing the extension to it, and help is needed for other platforms. IntelliSense data ...