Elecrow RA-08H LoRaWAN Node Board with RP2040 Controller - 868 MHz

First, install the Raspberry Pi Pico board support via the Arduino Board Manager. Then, add the required LoRa library (like Sandeep Mistry's library) for the RA-08H module. Connect the board via USB-C, select 'Raspberry Pi Pico' as the target board, and choose the correct COM port. You can then write and upload sketches that utilize the LoRa object for sending and receiving packets. Ensure the library is configured for the 868MHz frequency band and your specific LoRaWAN region parameters.

Connect a 3.7V single-cell LiPo battery to the onboard JST battery connector. For solar charging, wire a 5-6V solar panel (with a typical current of 100mA-1A) to the dedicated solar input terminals. The onboard power management IC will prioritize solar power to run the board and charge the battery simultaneously. For optimal longevity, program the RP2040 to use deep sleep modes between sensor readings and LoRa transmissions to minimize average current consumption, allowing the solar panel to replenish the battery daily.

You need to use a LoRaWAN stack library compatible with the RP2040, such as the Arduino-LMIC library. In your firmware, you must configure the OTAA (Over-The-Air Activation) parameters: the DevEUI, AppEUI, and AppKey obtained from your TTN application. Set the correct frequency plan for your region (e.g., EU868). The code must handle the join procedure and subsequent uplink/downlink communication. Ensure the antenna is securely connected to the SMA port and the board is within range of a TTN Gateway operating on the same frequency band.