RAKwireless RAK1920 Sensor Adapter for Click, QWIIC & Grove Modules

Match the sensor type to the correct Grove connector on the RAK1920. I2C and digital Grove sensors connect to the first Grove port, while UART and analog sensors use the second Grove port. Ensure your WisBlock core (e.g., RAK4631) is powered and inserted into a WisBlock base. The adapter handles the physical connection and power routing automatically via the WisBlock backplane.

Yes, the RAK1920 supports 5V sensor modules when used with a WisBlock baseboard that provides a 5V power rail (e.g., RAK5005-O). The adapter itself operates at 3.3V logic, but it routes the higher voltage from the base to the appropriate connectors. Always verify your specific WisBlock base's power output capabilities before connecting 5V devices to avoid damaging lower-voltage components.

The Positive Temperature Coefficient (PTC) thermistor acts as a resettable fuse for over-current protection. If a connected sensor module draws excessive current or experiences a short circuit, the PTC's resistance increases dramatically, limiting the current flow and preventing damage to the WisBlock core, baseboard, or the adapter itself. It automatically resets once the fault condition is removed and the device cools down.

The RAK1920 is compatible with any WisBlock core module that fits the standard WisBlock baseboard, such as the LoRaWAN-focused RAK4631 (nRF52840 + SX1262), the BLE-centric RAK11720 (BL602), or other RAK cores. The adapter communicates via the WisBlock backplane's defined GPIO, I2C, UART, and power pins, making it agnostic to the specific wireless protocol of the core, enabling flexible LoRa, LoRaWAN, or BLE sensor node designs.