add 315mhz RF gateway (#209)

based on RF gateway add the same implementation for 315mhz to facilitate the integration for whom who wants to use 433 and 315

ZgatewayRF315.ino

@@ -0,0 +1,144 @@
+/*  
+  OpenMQTTGateway  - ESP8266 or Arduino program for home automation 
+
+   Act as a wifi or ethernet gateway between your 433mhz/infrared IR signal  and a MQTT broker 
+   Send and receiving command by MQTT
+ 
+  This gateway enables to:
+ - receive MQTT data from a topic and send RF 315Mhz signal corresponding to the received MQTT data
+ - publish MQTT data to a different topic related to received 315Mhz signal
+
+    Copyright: (c)Florian ROBERT
+  
+    This file is part of OpenMQTTGateway.
+    
+    OpenMQTTGateway is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenMQTTGateway is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifdef ZgatewayRF315
+
+#include <RCSwitch.h> // library for controling Radio frequency switch
+
+RCSwitch mySwitch315 = RCSwitch();
+
+void setupRF315(){
+
+  //RF init parameters
+  mySwitch315.enableTransmit(RF315_EMITTER_PIN);
+  trc(F("RF315_EMITTER_PIN "));
+  trc(RF315_EMITTER_PIN);
+  mySwitch315.setRepeatTransmit(RF315_EMITTER_REPEAT); 
+  mySwitch315.enableReceive(RF315_RECEIVER_PIN); 
+  trc(F("RF315_RECEIVER_PIN "));
+  trc(RF315_RECEIVER_PIN);
+  trc(F("ZgatewayRF315 setup done "));
+}
+
+boolean RF315toMQTT(){
+
+  if (mySwitch315.available()){
+    trc(F("Rcv. RF315"));
+    #ifdef ESP32
+      String taskMessage = "RF Task running on core ";
+      taskMessage = taskMessage + xPortGetCoreID();
+      trc(taskMessage);
+    #endif
+    unsigned long MQTTvalue = 0;
+    String MQTTprotocol;
+    String MQTTbits;
+    String MQTTlength;
+    MQTTvalue = mySwitch315.getReceivedValue();
+    MQTTprotocol = String(mySwitch315.getReceivedProtocol());
+    MQTTbits = String(mySwitch315.getReceivedBitlength());
+    MQTTlength = String(mySwitch315.getReceivedDelay());
+    mySwitch315.resetAvailable();
+    if (!isAduplicate(MQTTvalue) && MQTTvalue!=0) {// conditions to avoid duplications of RF -->MQTT
+        trc(F("Adv data RF315toMQTT"));
+        client.publish(subjectRF315toMQTTprotocol,(char *)MQTTprotocol.c_str());
+        client.publish(subjectRF315toMQTTbits,(char *)MQTTbits.c_str());    
+        client.publish(subjectRF315toMQTTlength,(char *)MQTTlength.c_str());    
+        trc(F("Sending RF315toMQTT"));
+        String value = String(MQTTvalue);
+        trc(value);
+        boolean result = client.publish(subjectRF315toMQTT,(char *)value.c_str());
+        if (repeatRF315wMQTT){
+            trc(F("Publish RF315 for repeat"));
+            client.publish(subjectMQTTtoRF315,(char *)value.c_str());
+        }
+        return result;
+    } 
+  }
+  return false;
+}
+
+void MQTTtoRF315(char * topicOri, char * datacallback) {
+
+  unsigned long data = strtoul(datacallback, NULL, 10); // we will not be able to pass values > 4294967295
+
+  // RF315 DATA ANALYSIS
+  //We look into the subject to see if a special RF protocol is defined 
+  String topic = topicOri;
+  int valuePRT = 0;
+  int valuePLSL  = 0;
+  int valueBITS  = 0;
+  int pos = topic.lastIndexOf(RF315protocolKey);       
+  if (pos != -1){
+    pos = pos + +strlen(RF315protocolKey);
+    valuePRT = (topic.substring(pos,pos + 1)).toInt();
+    trc(F("RF315 Protocol:"));
+    trc(valuePRT);
+  }
+  //We look into the subject to see if a special RF pulselength is defined 
+  int pos2 = topic.lastIndexOf(RF315pulselengthKey);
+  if (pos2 != -1) {
+    pos2 = pos2 + strlen(RF315pulselengthKey);
+    valuePLSL = (topic.substring(pos2,pos2 + 3)).toInt();
+    trc(F("RF315 Pulse Lgth:"));
+    trc(valuePLSL);
+  }
+  int pos3 = topic.lastIndexOf(RF315bitsKey);       
+  if (pos3 != -1){
+    pos3 = pos3 + strlen(RF315bitsKey);
+    valueBITS = (topic.substring(pos3,pos3 + 2)).toInt();
+    trc(F("Bits nb:"));
+    trc(valueBITS);
+  }
+  
+  if ((topic == subjectMQTTtoRF315) && (valuePRT == 0) && (valuePLSL  == 0) && (valueBITS == 0)){
+    trc(F("MQTTtoRF315 dflt"));
+    mySwitch315.setProtocol(1,350);
+    mySwitch315.send(data, 24);
+    // Acknowledgement to the GTWRF topic
+    boolean result = client.publish(subjectGTWRF315toMQTT, datacallback);
+    if (result)trc(F("Ack pub."));
+    
+  } else if ((valuePRT != 0) || (valuePLSL  != 0)|| (valueBITS  != 0)){
+    trc(F("MQTTtoRF315 usr par."));
+    if (valuePRT == 0) valuePRT = 1;
+    if (valuePLSL == 0) valuePLSL = 350;
+    if (valueBITS == 0) valueBITS = 24;
+    trc(valuePRT);
+    trc(valuePLSL);
+    trc(valueBITS);
+    mySwitch315.setProtocol(valuePRT,valuePLSL);
+    mySwitch315.send(data, valueBITS);
+    // Acknowledgement to the GTWRF topic 
+    boolean result = client.publish(subjectGTWRF315toMQTT, datacallback);// we acknowledge the sending by publishing the value to an acknowledgement topic, for the moment even if it is a signal repetition we acknowledge also
+    if (result){
+      trc(F("MQTTtoRF315 ack pub."));
+      trc(data);
+    }
+  }
+  
+}
+#endif