Merge pull request #592 from AlbertWeterings/UARTtoMQTT

UART<->MQTT

code/espurna/config/arduino.h

@@ -90,6 +90,7 @@
 //#define TERMINAL_SUPPORT       0
 //#define THINGSPEAK_SUPPORT     0
 //#define WEB_SUPPORT            0
+//#define UART_MQTT_SUPPORT      1
 
 //--------------------------------------------------------------------------------
 // Sensors (values below are non-default values)

code/espurna/config/general.h

@@ -586,6 +586,8 @@ PROGMEM const char* const custom_reset_string[] = {
 #define MQTT_TOPIC_RFIN         "rfin"
 #define MQTT_TOPIC_RFLEARN      "rflearn"
 #define MQTT_TOPIC_RFRAW        "rfraw"
+#define MQTT_TOPIC_UARTIN       "uartin"
+#define MQTT_TOPIC_UARTOUT      "uartout"
 
 // Light module
 #define MQTT_TOPIC_CHANNEL      "channel"

code/espurna/config/hardware.h

@@ -1424,7 +1424,18 @@
     #define RELAY8_PIN          15
     #define RELAY8_TYPE         RELAY_TYPE_NORMAL
 
-// -----------------------------------------------------------------------------
+#endif
+
+#if defined(UART_MQTT_SUPPORT)
+    // Set baudrate on serial line
+    #define SERIAL_BAUDRATE     115200
+
+    // MQTT support is mandatory
+	#define MQTT_SUPPORT           1
+
+    // Remove UART noise on serial line
+    #define TERMINAL_SUPPORT        0
+    #define DEBUG_SERIAL_SUPPORT    0
 
 #elif defined(STM_RELAY)
 

code/espurna/espurna.ino

@@ -147,6 +147,10 @@ void setup() {
     #if SCHEDULER_SUPPORT
         schSetup();
     #endif
+    #ifdef UART_MQTT_SUPPORT
+        uart_mqttSetup();
+    #endif
+
 
     // 3rd party code hook
     #if USE_EXTRA

code/espurna/uart_mqtt

@@ -0,0 +1,86 @@
+#ifdef UART_MQTT_SUPPORT
+
+// -----------------------------------------------------------------------------
+// GLOBALS TO THE MODULE
+// -----------------------------------------------------------------------------
+const byte numChars = 100;
+char receivedChars[numChars]; // an array to store the received data
+boolean newData = false;
+
+void _recvWithEndMarker() {
+  static byte ndx = 0;
+  char endMarker = '\n';
+  char rc;
+ 
+  while (Serial.available() > 0 && newData == false) {
+    rc = Serial.read();
+
+    if (rc != endMarker) {
+      receivedChars[ndx] = rc;
+      ndx++;
+      if (ndx >= numChars) {
+        ndx = numChars - 1;
+      }
+    }
+    else {
+      receivedChars[ndx] = '\0'; // terminate the string
+      ndx = 0;
+      newData = true;
+    }
+  }
+}
+
+void _uartSendUART_MQTT() {
+  if (newData == true && MQTT_SUPPORT) {
+    DEBUG_MSG_P(PSTR("[UART_MQTT] Send data over MQTT: %s\n"), receivedChars);
+    mqttSend(MQTT_TOPIC_UARTIN, receivedChars); // publish: UART -> mqtt bus
+    newData = false;
+  }
+}
+
+void _uartSendMQTT_UART(const char * message) {
+  DEBUG_MSG_P(PSTR("[UART_MQTT] Send data over UART: %s\n"), message);
+  Serial.print(message);
+  Serial.println();
+}
+
+#if MQTT_SUPPORT
+void _UART_MQTTMqttCallback(unsigned int type, const char * topic, const char * payload) {
+    if (type == MQTT_CONNECT_EVENT) {
+        mqttSubscribe(MQTT_TOPIC_UARTOUT);
+    }
+
+    if (type == MQTT_MESSAGE_EVENT) {
+
+        // Match topic
+        String t = mqttTopicKey((char *) topic);
+        bool isUARTOut = t.equals(MQTT_TOPIC_UARTOUT);
+
+        if (isUARTOut) {
+          _uartSendMQTT_UART(payload);
+        }
+    }
+}
+#endif
+
+// -----------------------------------------------------------------------------
+// SETUP & LOOP
+// -----------------------------------------------------------------------------
+
+void uart_mqttSetup() {
+
+    #if MQTT_SUPPORT
+        mqttRegister(_UART_MQTTMqttCallback);
+    #endif
+
+    // Register oop
+    espurnaRegisterLoop(UART_MQTTLoop);
+
+}
+
+void UART_MQTTLoop() {
+     _recvWithEndMarker();
+     _uartSendUART_MQTT();
+}
+
+#endif