diff --git a/nippleremote_firmware/nippleremote_firmware.ino b/nippleremote_firmware/nippleremote_firmware.ino
index 42cbf6c..10b9866 100644
--- a/nippleremote_firmware/nippleremote_firmware.ino
+++ b/nippleremote_firmware/nippleremote_firmware.ino
@@ -48,7 +48,8 @@ RF24 radio(9,10); //ce, cs
 //Miso D12
 //Mosi D11
 // Radio pipe addresses for the 2 nodes to communicate.
-const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };
+const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };  //0xF0F0F0F0xxLL, xx is 1-byte address
+#define NRF24CHANNEL 75
 
 struct nrfdata {
   uint8_t steer; //between 0 and 255,  127 is stop. will be scaled to -1000 to 1000
@@ -134,6 +135,8 @@ void setup() {
   //Serial.println(radio.getCRCLength());
 
   radio.setDataRate( RF24_250KBPS ); //set to slow data rate. default was 1MBPS
+
+  radio.setChannel(NRF24CHANNEL); //0 to 124 (inclusive)
   
   radio.setRetries(15,15); // optionally, increase the delay between retries & # of retries
   radio.setPayloadSize(8); // optionally, reduce the payload size.  seems to improve reliability