MQTT to rfSwitch Bridge

send rfSwitch codes via mqtt

esp8266/mqtt-rfswitch/mqtt-rfswitch.ino

@@ -0,0 +1,109 @@
+/* Usage: 
+   ESP will subscribe to mqtt topic "ssid/macAddress" waiting for tri State codes to be sent.
+   Where 
+     - "ssid" is the ssid of the wifi, the esp will connect and
+     - "macAddress" is the hardware address of the esp itself
+
+   Upon mqtt connect the device will publish an "online" message to the same topic.
+
+   To send commands to the device use mosquitto_pub e.g.
+   mosquitto_pub -t myWifi/18fe349bde2c -m '0FF00FF0FFF0'
+*/
+
+#include <ESP8266WiFi.h>
+#include <PubSubClient.h>
+#include <RCSwitch.h>
+
+
+// Update these with values suitable for your network.
+
+const char* ssid        = "myWifi";
+const char* password    = "s3cr3t";
+const char* mqtt_server = "mqtt.is.sexy";
+const int   mqtt_port   = 1883;
+
+WiFiClient   espClient;
+PubSubClient mqttClient(espClient);
+RCSwitch     rcSwitch = RCSwitch();
+
+char mac[13];
+char mqttTopic[65];
+
+void setup() {
+  Serial.begin(115200);
+  
+  setup_wifi();
+  setup_mqtt();
+  setup_rcSwitch();
+}
+
+void setup_rcSwitch() {
+  rcSwitch.enableTransmit(2);
+}
+
+void setup_mqtt() {
+  mqttClient.setServer(mqtt_server, mqtt_port);
+  mqttClient.setCallback(mqtt_recv);
+  snprintf (mqttTopic, 64, "%s/%s", ssid, mac);
+}
+
+void setup_wifi() {
+  Serial.println();
+  uint8_t mac_t[6];
+  WiFi.macAddress(mac_t);
+  sprintf(mac,"%02x%02x%02x%02x%02x%02x",mac_t[0],mac_t[1],mac_t[2],mac_t[3],mac_t[4],mac_t[5]);
+  Serial.println(sprintf("Client MAC Address: %s",mac));
+  
+  Serial.print("Connecting to ");
+  Serial.println(ssid);
+  
+  WiFi.begin(ssid, password);
+
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+
+  Serial.println("WiFi connected");
+  Serial.print("  IP address: ");
+  Serial.println(WiFi.localIP());
+}
+
+void mqtt_recv(char* topic, byte* payload, unsigned int length) {
+/*
+  Serial.print(topic);
+  Serial.print(": ");
+  for (int i = 0; i < length; i++) {
+    Serial.print((char)payload[i]);
+  }
+  Serial.println();
+*/
+  char *cmd = (char*)malloc(length + 2);
+  snprintf(cmd,length + 1,"%s",(char*)payload);
+  mqttClient.publish("esp8266/debug",cmd);
+  rcSwitch.sendTriState((char*)cmd);
+  
+  delay(1000);
+}
+
+void mqtt_reconnect() {
+  while (!mqttClient.connected()) {
+    Serial.print("Attempting MQTT connection...");
+    if (mqttClient.connect("ESP8266Client")) {
+      Serial.println("connected");
+      mqttClient.publish(mqttTopic, "reconnected");
+      mqttClient.subscribe(mqttTopic);
+    } else {
+      Serial.print("failed, rc=");
+      Serial.print(mqttClient.state());
+      Serial.println();
+      delay(5000);
+    }
+  }
+  if(mqttClient.loop()) {
+    delay(200);
+  }
+}
+void loop() {
+  mqtt_reconnect();
+}