SX126x-Arduino | Arduino library to use Semtech SX126x LoRa chips

GPIO definitions for an ESP32. Change it to the connections between the ESP32 and the SX126x in your specific HW design. Fill the structure with the HW configuration. Some modules integrate an MCU and the SX126x LoRa transceiver and have a fixed connection between them. In these cases a simplified initialization can be used. The ISP4520 module has the nRF52832 and SX1261 or SX1262 chips integrated in a module. Therefore the hardware configuration is fixed. To initialize the LoRa chip you need only to specify if the module is based on a SX1261 (ISP4520 EU version) or on a SX1262 (ISP4520 US version). The RAK11300/11310 module has the Rp2040 and SX1262 chips integrated in a module. Therefore the hardware configuration is fixed. When you want to use the deep sleep function of the ESP32 with external wake up source, you do not want to reset and reconfigure the SX126x chip after its IRQ woke up the ESP32. Radio.ReInit() sets up only the required communication without resetting the SX1262. Radio.IrqProcessAfterDeepSleep() is checking the reason for the wake-up IRQ and calls the event handler.