Many people is reporting powering problems when using amplified version of the NRF-chip on the gateway. The radio needs to be feeded separately with a stable 3v3. The Nanos 3v3 output is not sufficient for PA_MAX. Defaulting this to LOW now. If you are using a vanilla radio on gateway you can switch to MAX again.

Author: henrikekblad

libraries/MySensors/MyConfig.h

@@ -7,7 +7,7 @@
 #define RF24_CHANNEL	   76             //RF channel for the sensor net, 0-127
 #define RF24_DATARATE 	   RF24_250KBPS   //RF24_250KBPS for 250kbs, RF24_1MBPS for 1Mbps, or RF24_2MBPS for 2Mbps
 #define RF24_PA_LEVEL 	   RF24_PA_MAX    //Sensor PA Level == RF24_PA_MIN=-18dBm, RF24_PA_LOW=-12dBm, RF24_PA_HIGH=-6dBM, and RF24_PA_MAX=0dBm
-#define RF24_PA_LEVEL_GW   RF24_PA_LEVEL  //Gateway PA Level, defaults to Sensor net PA Level.  Tune here if using an amplified nRF2401+ in your gateway.
+#define RF24_PA_LEVEL_GW   RF24_PA_LOW  //Gateway PA Level, defaults to Sensor net PA Level.  Tune here if using an amplified nRF2401+ in your gateway.
 #define BASE_RADIO_ID 	   ((uint64_t)0xA8A8E1FC00LL) // This is also act as base value for sensor nodeId addresses. Change this (or channel) if you have more than one sensor network.
 
 // MySensors online examples defaults