Basic RS232 Communication (#780)

* Added ZGateway RS232

main/config_RS232.h

@@ -0,0 +1,72 @@
+/*  
+  OpenMQTTGateway  - ESP8266 or Arduino program for home automation 
+
+   Act as a wifi or ethernet gateway between your RS232 device and a MQTT broker 
+   Send and receiving command by MQTT
+ 
+   This files enables to set your parameter for the RS232 gateway 
+  
+    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/>.
+*/
+#ifndef config_RS232_h
+#define config_RS232_h
+
+extern void setupRS232();
+extern void RS232toMQTT();
+extern void MQTTtoRS232(char* topicOri, JsonObject& RS232data);
+
+/*-------------------IR topics & parameters----------------------*/
+//RS232 MQTT Subjects
+#define subjectGTWRS232toMQTT     "/RS232toMQTT"
+#define subjectRS232toMQTT        "/RS232toMQTT"
+#define subjectMQTTtoRS232        "/commands/MQTTtoRS232"
+#define subjectForwardMQTTtoRS232 "home/gateway2/commands/MQTTtoRS232"
+
+//Setup for RS232
+#define MAX_INPUT   50 // how much serial data we expect
+#define RS232Baud   9600 // The serial connection Baud
+#define RS232Pre    "00" // The prefix for the RS232 message
+#define RS232Post   "\r" // The postfix for the RS232 message
+#define RS232InPost '\r' // Hacky way to get last character of postfix for incoming
+
+/*-------------------PIN DEFINITIONS----------------------*/
+#ifndef RS232_RX_GPIO
+#  ifdef ESP8266
+#    define RS232_RX_GPIO 4 //D2
+#  elif ESP32
+#    define RS232_RX_GPIO 26
+#  elif __AVR_ATmega2560__
+#    define RS232_RX_GPIO 2 // 2 = D2 on arduino mega
+#  else
+#    define RS232_RX_GPIO 0 // 0 = D2 on arduino UNO
+#  endif
+#endif
+
+#ifndef RS232_TX_GPIO
+#  ifdef ESP8266
+#    define RS232_TX_GPIO 2 //D4
+#  elif ESP32
+#    define RS232_TX_GPIO 14
+#  elif __AVR_ATmega2560__
+#    define RS232_TX_GPIO 9
+#  else
+#    define RS232_TX_GPIO 9
+#  endif
+#endif
+
+#endif