Attaching a Mini I2C SSD1306 OLED Display to Meshtastic Kit with XIAO nRF52840 and Wio-SX1262

Meshtastic is an open-source, decentralized communication network built on LoRa technology. In my first video, I set up two Meshtastic nodes using the XIAO nRF52840 and Wio-SX1262 Kit.

In my second video, I upgraded the nodes by enabling I2C support and adding the Telemetry module to report temperature and barometric pressure from a BMP280 sensor. Enabling I2C required recompiling the Meshtastic firmware for the XIAO nRF52840 and Wio-SX1262 Kit from source.

This upgrade also made it possible to connect a mini OLED display. In my third Meshtastic video I used a yellow-blue 0.96″ SSD1306 I2C OLED display that operates at 3.3 V. I wired SDA to D6 and SCL to D7 on the XIAO nRF52840, instead of the default hardware I2C pins defined in the Meshtastic firmware configuration.