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I have no problem receiving packets for months with esp32+Ai-Thinker/RFM95. You can try to use the receiver at https://github.com/sandeepmistry/arduino-LoRa/blob/master/examples/LoRaReceiverCallback/LoRaReceiverCallback.ino You need to set the pins, too. https://github.com/sandeepmistry/arduino-LoRa/blob/master/API.md#set-pins

Can try to use callback listener instead of parsePacket.

May be related and solved issue: https://github.com/sandeepmistry/arduino-LoRa/issues/363

Search for pyLoRa. It is for Pi. Python btw. You may want to port to golang yourself.

1. Use onReceive() ISR 2. Leave your LoRa in Receive mode. 3. When there is some LoRa message, DIO0 will go HIGH. 4. You have to set DIO0 to wake...

433.125Mhz is MUCH different from 433Mhz. So 0.125Mhz is matter. You MUST have the same configuration on BOTH nodes.

I tried already. Confirmed to pass LoRa.setFrequency(433125000). 433125000 is a "long". It won't interfere to node with LoRa.setFrequency(433E6). To avoid interference between 433 and 433.125Mhz, your bandwidth should be less...

Remove the LCD code and use standard example code first. If still hitting error, either wrong pin mapping or not enough power to LoRa. For less likely issue, you may...

@ASHJAY97 If you were me, would you know what I did with my boards, my source code and wiring? So in order to help, you have to take your effort...

@Kongduino AIThinker ra01/02 is same as RFM95. But they use 433Mhz instead. They still use 3.3v logic unless the board is modified.