@tlpeter said: if (oldBatteryPcnt != batteryPcnt) { // Power up radio after sleep send(msgBatt.set(batteryV, 1)); //sendBatteryLevel(batteryPcnt); oldBatteryPcnt = batteryPcnt; } Hi, This part should not have been updated this part is icluded in the lib So leave it like the exsample if (oldBatteryPcnt != batteryPcnt) { // Power up radio after sleep sendBatteryLevel(batteryPcnt); oldBatteryPcnt = batteryPcnt; } For sending over your voltage you need one additional send(msgBatt.set(batteryV, 1)); Good luck

@tlpeter Took me a while to find a circuit for the LE33. I use a 0.1 uf keramic capacitor between VIN and GND and a 2.2uf elco between gnd and VOUT. That does the job for me in terms of keeping a stable circuit.