revert mission timer to 32 bit, add signal level monitoring

main/components/radio.c

@@ -202,6 +202,7 @@ void prepare_and_send_telemetry(uint64_t missionTimer)
             fsync(fileno(csvFile)); // Critical: this ensures actual write to disk
         }
 
+    printf("Sending %d byte packet hehe\n", offset);
     send_packet_without_retries(bufOut, offset);
     packetReadiness = 0;
 }