Raspberry Pi Pico Supported Peripherals
I2C peripherals
I2C peripherals like OLEDOLED (Organic Light-Emitting Diode). A display type used on many Meshtastic devices. The OLED Type setting selects which panel driver the firmware uses. Displays (e.g. SSD1306 or SH1106) and keyboards (e.g. CardKB) can be connected to GPIOGPIO (General Purpose Input/Output). An uncommitted digital signal pin on a device. pins 4 (SDA) and 5 (SCL), which will be recognized on boot. Note that for keyboard input, the Canned Message Module has to be enabled and the input source should be specified.
External device using Serial Module
For connecting an external device via the Serial Module, it's recommended to use GPIOGPIO (General Purpose Input/Output). An uncommitted digital signal pin on a device. pins 8 (serial.txd) and 9 (serial.rxd).