4 layers

Lora node
Mehdi-Ldj/lora-ble-sensor-node
Off-grid LoRa/BLE sensor node — 868 MHz LoRa, 2.4 GHz BLE, solar/LiFePO4
110 partsCERN-OHL-P-2.0
KiCad boards from 1 GitHub repository tagged “sensor-node”, the most starred first; open any of them in PCBKit.

Mehdi-Ldj/lora-ble-sensor-node
Off-grid LoRa/BLE sensor node — 868 MHz LoRa, 2.4 GHz BLE, solar/LiFePO4