Rf receive only (#701)

* Disable RF transmit

* Added definition example (commented out)

Co-authored-by: Jonathan Michael Wells <jonathan-wells@oist.jp>

docs/use/rf.md

@@ -15,6 +15,12 @@ Generate your RF signals by pressing a remote button or other and you should see
 
 `home/OpenMQTTGateway/433toMQTT {"value":1315156,"protocol":1,"length":24,"delay":317}`
 
+### Disabling Transmit function to safe a PIN
+
+To disable transmit functions to allow the use of another pin, add the following to the config_rf.h file :
+
+`#define RF_DISABLE_TRANSMIT`
+
 ### Send data by MQTT to convert it on RF signal 
 
 `mosquitto_pub -t "home/OpenMQTTGateway/commands/MQTTto433" -m '{"value":1315156}'`

main/ZgatewayRF.ino

@@ -63,7 +63,11 @@ void setupRF() {
   ELECHOUSE_cc1101.setMHZ(CC1101_FREQUENCY);
   ELECHOUSE_cc1101.SetRx(CC1101_FREQUENCY);
 #  endif
+#  ifdef RF_DISABLE_TRANSMIT
+  mySwitch.disableTransmit();
+#  else
   mySwitch.enableTransmit(RF_EMITTER_GPIO);
+#  endif
   mySwitch.setRepeatTransmit(RF_EMITTER_REPEAT);
   mySwitch.enableReceive(RF_RECEIVER_GPIO);
   Log.trace(F("ZgatewayRF setup done" CR));

main/config_RF.h

@@ -60,6 +60,7 @@ extern void MQTTtoPilight(char* topicOri, JsonObject& RFdata);
 #define subjectMultiGTWRF "+/+/433toMQTT"
 //RF number of signal repetition - Can be overridden by specifying "repeat" in a JSON message.
 #define RF_EMITTER_REPEAT 20
+//#define RF_DISABLE_TRANSMIT //Uncomment this line to disable RF transmissions. (RF Receive will work as normal.)
 
 /*-------------------RF2 topics & parameters----------------------*/
 //433Mhz newremoteswitch MQTT Subjects and keys