Progress on mqtt connection for esp8266 rgb strips

ESP8266-RGB-MQTT/ESP8266-RGB-MQTT.h.template

@@ -1,3 +1,15 @@
 // WiFi configuration
 const char* ssid = "http://kiel.freifunk.net/";
 const char* password = "";
+
+// MQTT Broker
+const char* mqtt_server = "broker.mqtt-dashboard.com";
+
+// Device identification
+const char* mqtt_device_name = "esp8266client"
+
+// MQTT topics
+const char* mqtt_topic_power = "esp8266client/power";
+const char* mqtt_topic_color = "esp8266client/color";
+const char* mqtt_topic_breathe = "esp8266client/breathe";
+const char* mqtt_topic_cycle = "esp8266client/cycle";

ESP8266-RGB-MQTT/ESP8266-RGB-MQTT.ino

@@ -1,73 +1,100 @@
-/*
- Basic ESP8266 MQTT example
+/**********************************************************************
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Nis Wechselberg
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ **********************************************************************/
 
- This sketch demonstrates the capabilities of the pubsub library in combination
- with the ESP8266 board/library.
-
- It connects to an MQTT server then:
-  - publishes "hello world" to the topic "outTopic" every two seconds
-  - subscribes to the topic "inTopic", printing out any messages
-    it receives. NB - it assumes the received payloads are strings not binary
-  - If the first character of the topic "inTopic" is an 1, switch ON the ESP Led,
-    else switch it off
-
- It will reconnect to the server if the connection is lost using a blocking
- reconnect function. See the 'mqtt_reconnect_nonblocking' example for how to
- achieve the same result without blocking the main loop.
-
- To install the ESP8266 board, (using Arduino 1.6.4+):
-  - Add the following 3rd party board manager under "File -> Preferences -> Additional Boards Manager URLs":
-       http://arduino.esp8266.com/stable/package_esp8266com_index.json
-  - Open the "Tools -> Board -> Board Manager" and click install for the ESP8266"
-  - Select your ESP8266 in "Tools -> Board"
-
-*/
+/**********************************************************************
+ * ESP8266-RGB-MQTT
+ * 
+ * Links the ESP8266 based RGB led strip to an mqtt broker.
+ * The program uses multiple topics for incoming and outgoing messages.
+ * Incoming topics:
+ * - <mqtt_device>/power
+ * - <mqtt_device>/color
+ * - <mqtt_device>/breathing
+ * - <mqtt_device>/cycle
+ * Outgoing topics:
+ *
+ **********************************************************************/
 
 #include <ESP8266WiFi.h>
 #include <PubSubClient.h>
+#include "ESP8266-RGB-MQTT.h"
 
-// Update these with values suitable for your network.
-
-const char* ssid = "........";
-const char* password = "........";
-const char* mqtt_server = "broker.mqtt-dashboard.com";
-
+// Global mqtt client object
 WiFiClient espClient;
 PubSubClient client(espClient);
-long lastMsg = 0;
-char msg[50];
-int value = 0;
 
+// RGB strip pin configuration
+const short redPin = 14;
+const short greenPin = 16;
+const short bluePin = 12;
+
+
+
+/*
+ * Initial setup for arduino
+ */
 void setup() {
-  pinMode(BUILTIN_LED, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
+  // Configure serial port
   Serial.begin(115200);
+  delay(10);
+  
+  // Prepare WiFi connection
   setup_wifi();
+
+  // Connect to mqtt broker
   client.setServer(mqtt_server, 1883);
-  client.setCallback(callback);
+  client.setCallback(incoming_mqtt);
 }
 
+/*
+ * Prepares the wireless connection
+ */
 void setup_wifi() {
+  // Connect to the WiFi as a client
+  WiFi.mode(WIFI_STA);
   
-  delay(10);
-  // We start by connecting to a WiFi network
+  // Do the connection
   Serial.println();
   Serial.print("Connecting to ");
   Serial.println(ssid);
-
   WiFi.begin(ssid, password);
-
   while (WiFi.status() != WL_CONNECTED) {
     delay(500);
     Serial.print(".");
   }
-
   Serial.println("");
   Serial.println("WiFi connected");
-  Serial.println("IP address: ");
+  
+  // Print IP address to serial
+  Serial.print("My IP address: ");
   Serial.println(WiFi.localIP());
 }
 
-void callback(char* topic, byte* payload, unsigned int length) {
+/*
+ * Callback method for incoming mqtt messages
+ */
+void incoming_mqtt(char* topic, byte* payload, unsigned int length) {
   Serial.print("Message arrived [");
   Serial.print(topic);
   Serial.print("] ");
@@ -76,28 +103,38 @@ void callback(char* topic, byte* payload, unsigned int length) {
   }
   Serial.println();
 
-  // Switch on the LED if an 1 was received as first character
-  if ((char)payload[0] == '1') {
-    digitalWrite(BUILTIN_LED, LOW);   // Turn the LED on (Note that LOW is the voltage level
-    // but actually the LED is on; this is because
-    // it is acive low on the ESP-01)
-  } else {
-    digitalWrite(BUILTIN_LED, HIGH);  // Turn the LED off by making the voltage HIGH
+  if (strcmp(topic, mqtt_topic_power) == 0) {
+
+  }
+  if (strcmp(topic, mqtt_topic_color) == 0) {
+
+  }
+  if (strcmp(topic, mqtt_topic_cycle) == 0) {
+
+  }
+  if (strcmp(topic, mqtt_topic_breathe) == 0) {
+
   }
 
 }
 
+/*
+ * Blocking reconnect to the mqtt broker
+ */
 void reconnect() {
   // Loop until we're reconnected
   while (!client.connected()) {
     Serial.print("Attempting MQTT connection...");
     // Attempt to connect
-    if (client.connect("ESP8266Client")) {
+    if (client.connect(mqtt_device)) {
       Serial.println("connected");
       // Once connected, publish an announcement...
-      client.publish("outTopic", "hello world");
-      // ... and resubscribe
-      client.subscribe("inTopic");
+      // client.publish("outTopic", "hello world");
+      // subscribe to incoming topics
+      client.subscribe(mqtt_topic_power);
+      client.subscribe(mqtt_topic_color);
+      client.subscribe(mqtt_topic_cycle);
+      client.subscribe(mqtt_topic_breathe);
     } else {
       Serial.print("failed, rc=");
       Serial.print(client.state());
@@ -107,20 +144,16 @@ void reconnect() {
     }
   }
 }
-void loop() {
 
+void updateColor() {
+  
+}
+
+void loop() {
   if (!client.connected()) {
     reconnect();
   }
   client.loop();
 
-  long now = millis();
-  if (now - lastMsg > 2000) {
-    lastMsg = now;
-    ++value;
-    snprintf (msg, 75, "hello world #%ld", value);
-    Serial.print("Publish message: ");
-    Serial.println(msg);
-    client.publish("outTopic", msg);
-  }
+  updateColor();
 }