first working version and new project with homie

outdated/mqtt_esp8266_beamer/mqtt_esp8266_beamer.ino

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+//nodemcu 1.0      921600 baud
+
+/*
+ Basic ESP8266 MQTT example
+
+ 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"
+
+*/
+
+#include <ESP8266WiFi.h>
+#include <PubSubClient.h>
+
+#include <Adafruit_NeoPixel.h>
+#ifdef __AVR__
+  #include <avr/power.h>
+#endif
+
+#define PIN 2
+
+Adafruit_NeoPixel strip = Adafruit_NeoPixel(64, PIN, NEO_GRB + NEO_KHZ800);
+
+// Update these with values suitable for your network.
+
+const char* ssid = "CTDO-g";
+const char* password = "ctdo2342";
+const char* mqtt_server = "raum.ctdo.de";
+
+WiFiClient espClient;
+PubSubClient client(espClient);
+long lastMsg = 0;
+char msg[50];
+int value = 0;
+
+void setup_wifi() {
+
+  delay(10);
+  // We start by connecting to a WiFi network
+  Serial.println();
+  Serial.print("Connecting to ");
+  Serial.println(ssid);
+
+  WiFi.begin(ssid, password);
+
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+
+  randomSeed(micros());
+
+  Serial.println("");
+  Serial.println("WiFi connected");
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+}
+
+
+void led_fill(uint32_t c)
+{
+  for (int i=0; i < strip.numPixels(); i++) {
+    strip.setPixelColor(i, c);    //turn every third pixel on
+  }
+  strip.show();
+}
+
+void callback(char* topic, byte* payload, unsigned int length) {
+  Serial.print("Message arrived [");
+  Serial.print(topic);
+  Serial.print("] ");
+  String spayload="";
+  for (int i = 0; i < length; i++) {
+    //Serial.print((char)payload[i]);
+    spayload=spayload+(char)payload[i];
+  }
+  Serial.println(spayload);
+
+  if ((char)payload[0]=='#'){ //solid fill
+    int number = (int) strtol( &spayload[1], NULL, 16);
+
+    // Split them up into r, g, b values
+    int r = number >> 16;
+    int g = number >> 8 & 0xFF;
+    int b = number & 0xFF;
+    Serial.print("r=");Serial.print(r);
+    Serial.print(" g=");Serial.print(g);
+    Serial.print(" b=");Serial.println(b);
+
+    led_fill(strip.Color(r, g, b));
+  }
+
+  // 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)
+    led_fill(strip.Color(255, 127, 127));
+  } else {
+    digitalWrite(BUILTIN_LED, HIGH);  // Turn the LED off by making the voltage HIGH
+    led_fill(strip.Color(127, 127, 255));
+  }*/
+  
+  
+
+}
+
+void reconnect() {
+  // Loop until we're reconnected
+  while (!client.connected()) {
+    Serial.print("Attempting MQTT connection...");
+    // Create a random client ID
+    String clientId = "punkteprojektor";
+    clientId += String(random(0xffff), HEX);
+    // Attempt to connect
+    if (client.connect(clientId.c_str())) {
+      Serial.println("connected");
+      // Once connected, publish an announcement...
+      //client.publish("outTopic", "hello world");
+      // ... and resubscribe
+      client.subscribe("raum2/punkteprojektor");
+    } else {
+      Serial.print("failed, rc=");
+      Serial.print(client.state());
+      Serial.println(" try again in 5 seconds");
+      // Wait 5 seconds before retrying
+      delay(5000);
+    }
+  }
+}
+
+void setup() {
+  pinMode(BUILTIN_LED, OUTPUT);     // Initialize the BUILTIN_LED pin as an output
+  Serial.begin(115200);
+  setup_wifi();
+  client.setServer(mqtt_server, 1883);
+  client.setCallback(callback);
+
+  strip.begin();
+  strip.show(); // Initialize all pixels to 'off'
+
+  led_fill(strip.Color(0, 0, 0));
+}
+
+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);
+  }
+}
+
+
+
+

pixelprojektor/pixelprojektor.ino

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+#include <Homie.h>
+
+// homie lib from: https://github.com/marvinroger/homie-esp8266/
+
+
+HomieNode effectNode("effect", "commands");
+HomieNode pixelsNode("pixels", "commands");
+
+
+bool effectHandler(const HomieRange& range, const String& value) {
+  int sep = value.indexOf("|");
+  
+  
+  if(sep > 0) {
+    
+    //Homie.getLogger() << "scroll " << value << " wait " << wait << endl;
+     
+  } else {
+    
+    //Homie.getLogger() << "scroll " << value << endl;
+  }
+  
+  return true;
+}
+
+bool pixelsHandler(const HomieRange& range, const String& value) {
+  int sep = value.indexOf("|");
+  
+  
+  if(sep > 0) {
+    
+    //Homie.getLogger() << "scroll " << value << " wait " << wait << endl;
+     
+  } else {
+    
+    //Homie.getLogger() << "scroll " << value << endl;
+  }
+  
+  return true;
+}
+
+void setup() {
+  Serial.begin(115200);
+  Serial << endl << endl;
+  
+
+  Homie_setFirmware("pixelprojektor", "1.0.0");
+  
+  effectNode.advertise("on").settable(effectHandler);
+  pixelsNode.advertise("on").settable(pixelsHandler);
+
+  
+  Homie.setup();
+}
+
+void loop() {
+  Homie.loop();
+  long currentMillis = millis();
+  
+}
+
+
+