diff --git a/.gitignore b/.gitignore
index 791363e..efd8fd7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 .pio
 .vscode
 *_env.ini
+**/.DS_Store
diff --git a/docs/use/rf.md b/docs/use/rf.md
index b662901..8944a1a 100644
--- a/docs/use/rf.md
+++ b/docs/use/rf.md
@@ -73,16 +73,31 @@ Generate your RF signals by pressing a remote button or other and you will see :
 
 ![](../img/OpenMQTTGateway_Pilight_Digoo-DG-R8S.png)
 
-### Send data by MQTT to convert it on RF signal 
-**ON**
+### Send data by MQTT to transmit a RF signal
 
+#### Using a known protocol
+**ON**
 `mosquitto_pub -t "home/OpenMQTTGateway/commands/MQTTtoPilight" -m '{"message":"{\"systemcode\":12,\"unitcode\":22,\"on\":1}","protocol":"elro_400_switch"}'`
 
 **OFF**
-
 `mosquitto_pub -t "home/OpenMQTTGateway/commands/MQTTtoPilight" -m '{"message":"{\"systemcode\":12,\"unitcode\":22,\"off\":1}","protocol":"elro_400_switch"}'`
 
-Theses commands will send by RF the signals to actuate an elro_400 switch
+These commands will transmit by RF the signals to actuate an elro_400 switch.
+
+#### Using a raw signal
+You can transmit raw signal data by using the "raw" protocol. This uses the Pilight pulse train string format. One such example string, representing a transmission for Nexus protocol weather stations, looks like this: `c:03020202010102020102010101010101010202020201020102020202020101010201010202;p:500,1000,2000,4000;r:12@`. This string represents pulses and gaps directly.
+
+Each number in the list after `p:` that ends with `;` stands for **p**ulse and gap lengths in microseconds (µs). In this example, we have a list containing lengths of 500µs, 1000µs, 2000µs, and 4000µs.
+
+Each number after `c:` and ended by `;` represents a **c**ode that references the `p:` list by index. In this example, the first 4 numbers after `c:` are 0, 3, 0, and 2, which reference `p:`[0] = 500, `p:`[3] = 4000, `p:`[0] = 500, and `p:`[2] = 2000, respectively. In the language of digital radio transceiving, the most basic unit is usually a pulse and gap pair; in other words, 0s and 1s are represented by a pulse followed by a gap (lack of pulse) and the time lengths of these pulses and gaps. Different protocols have different pulse lengths and gap lengths representing 0, and a different one representing 1. Because of this pulse-gap nature, the codes in `c:` must be taken as pairs; the first number in a pair represents the length of the pulse, and the second number the subsequent gap. In this example, the first pair, 03, represents a pulse of 500µs followed by a gap of 4000µs. The next pair, 02, represents a pulse of 500µs followed by a gap of 2000µs.
+
+The number after `r:` represents how many times the message in the string is to be **r**epeated. The `r:` block is optional. The default number of repeats if `r:` is not specified is 10. Greater than about 100 repeats will cause a crash due to memory usage. If this example were written without specifying repeats, it would look like this: `{"raw":"c:03020202010102020102010101010101010202020201020102020202020101010201010202;p:500,1000,2000,4000@"}`
+
+The entire string must end in a `@`. Each block must end in a `;`, but if it is the last block in the string, the `@` replaces the `;`. Since the `r:` block is optional, this last block could be either `p:` or `r:`.
+
+The JSON for the MQTT message to `home/OpenMQTTGateway/commands/MQTTtoPilight` should specify the pulse train string as the value for the "raw" key: `{"raw":"c:03020202010102020102010101010101010202020201020102020202020101010201010202;p:500,1000,2000,4000;r:12@"}`.
+
+e.g. `mosquitto_pub -t "home/OpenMQTTGateway/commands/MQTTtoPilight" -m '{"raw":"c:03020202010102020102010101010101010202020201020102020202020101010201010202;p:500,1000,2000,4000;r:12@"}'`
 
 ## RF with SONOFF RF BRIDGE
 ### Receiving data from RF signal
diff --git a/main/ZgatewayPilight.ino b/main/ZgatewayPilight.ino
index 03b085f..bbde7c4 100644
--- a/main/ZgatewayPilight.ino
+++ b/main/ZgatewayPilight.ino
@@ -108,10 +108,21 @@ void MQTTtoPilight(char* topicOri, JsonObject& Pilightdata) {
     const char* raw = Pilightdata["raw"];
     if (raw) {
       uint16_t codes[MAXPULSESTREAMLENGTH];
-      int msgLength = rf.stringToPulseTrain(
-          raw, codes, MAXPULSESTREAMLENGTH);
+      int repeats = rf.stringToRepeats(raw);
+      if (repeats < 0) {
+        switch (repeats) {
+          case ESPiLight::ERROR_INVALID_PULSETRAIN_MSG_R:
+            Log.trace(F("'r' not found in string, or has no data" CR));
+            break;
+          case ESPiLight::ERROR_INVALID_PULSETRAIN_MSG_END:
+            Log.trace(F("';' or '@' not found in data string" CR));
+            break;
+        }
+        repeats = 10;
+      }
+      int msgLength = rf.stringToPulseTrain(raw, codes, MAXPULSESTREAMLENGTH);
       if (msgLength > 0) {
-        rf.sendPulseTrain(codes, msgLength);
+        rf.sendPulseTrain(codes, msgLength, repeats);
         Log.notice(F("MQTTtoPilight raw ok" CR));
       } else {
         Log.trace(F("MQTTtoPilight raw KO" CR));
diff --git a/main/config_RF.h b/main/config_RF.h
index b589537..3b26d08 100644
--- a/main/config_RF.h
+++ b/main/config_RF.h
@@ -78,7 +78,6 @@ extern void MQTTtoPilight(char* topicOri, JsonObject& RFdata);
 #define subjectMQTTtoPilight    "/commands/MQTTtoPilight"
 #define subjectPilighttoMQTT    "/PilighttoMQTT"
 #define subjectGTWPilighttoMQTT "/PilighttoMQTT"
-#define PilightRAW              "RAW"
 #define repeatPilightwMQTT      false // do we repeat a received signal by using mqtt with Pilight gateway
 
 /*-------------------CC1101 frequency----------------------*/