About SPI, I2C, UART, QPSI, I2S, PDM, QDEC: Each IO pin is preconfigured with IO_MUX functionality, which means you can use any GPIO as peripheral pins. You just need to define these pins in your SDK. However, it’s important to note that once a pin is used, it may affect other functions associated with that pin.

• Arduino
• PlatformIO

• MicroPython

In addition to Meshtastic support, we have also developed a complete LoRaWAN protocol in the nRF52 Arduino framework.

These pins can also be used for other functions like I2C, SPI, etc., but need to be properly configured when used for PWM output:

GPIO 0 – GPIO 31: Most of these pins can be used as PWM outputs, but the specific pins that support PWM depend on the timer and channel configuration. Most of the pins can be configured as regular GPIOs and support timer output.

For certain PWM frequency and duty cycle requirements, the software can typically control which timer channel is mapped to which GPIO pin.