Don't have an arduino toolchain set up and the debian-shipped appears to be about 20 years old, so, here's a patch...
--- a/RNode_Firmware.ino
+++ b/RNode_Firmware.ino
@@ -166,6 +166,7 @@ void receiveCallback(int packet_size) {
// output directly over to the host
read_len = 0;
last_rssi = LoRa.packetRssi();
+ last_snr = LoRa.packetSnr();
getPacketData(packet_size);
// We first signal the RSSI of the
Don't have an arduino toolchain set up and the debian-shipped appears to be about 20 years old, so, here's a patch...