add basic w5100 ethernet with mqtt sketch

controller/mixercontroller_w5100/mixercontroller_w5100.ino

@@ -0,0 +1,131 @@
+/*
+ * TODO:
+ * bestehende steuerung aus espcontroller übernehmen und testen
+ * topics und handler implementieren
+ */
+
+#include "Ethernet.h"
+#include "PubSubClient.h"
+
+String ip = "";
+uint8_t mac[6] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x06};
+
+#define CLIENT_ID       "Hal"
+EthernetClient ethClient;
+PubSubClient mqttClient;
+
+#define PUBLISH_DELAY 10000
+long last_send=0;
+
+void setup() {
+  pinMode(LED_BUILTIN, OUTPUT);
+  digitalWrite(LED_BUILTIN,HIGH);
+
+  // setup serial communication
+  Serial.begin(9600);
+  while (!Serial) {};
+  Serial.println(F("MQTT Arduino Demo"));
+
+  // setup ethernet communication using DHCP
+  if (Ethernet.begin(mac) == 0) {
+    //Serial.println(F("Unable to configure Ethernet using DHCP"));
+    for (;;);
+  }
+
+  Serial.println(F("Ethernet configured via DHCP"));
+  Serial.print("IP address: ");
+  Serial.println(Ethernet.localIP());
+  Serial.println();
+
+  ip = String (Ethernet.localIP()[0]);
+  ip = ip + ".";
+  ip = ip + String (Ethernet.localIP()[1]);
+  ip = ip + ".";
+  ip = ip + String (Ethernet.localIP()[2]);
+  ip = ip + ".";
+  ip = ip + String (Ethernet.localIP()[3]);
+  //Serial.println(ip);
+
+  // setup mqtt client
+  mqttClient.setClient(ethClient);
+  mqttClient.setServer("10.0.0.1", 1883);
+  Serial.println(F("MQTT client configured"));
+  mqttClient.setCallback(callback);
+  
+
+  Serial.println();
+  Serial.println(F("Ready to send data"));
+  last_send = millis();
+  
+
+
+}
+
+void reconnect() {
+  // Loop until we're reconnected
+  while (!mqttClient.connected()) {
+    Serial.print("Attempting MQTT connection...");
+    // Attempt to connect
+    if (mqttClient.connect(CLIENT_ID)) {
+      Serial.println("connected");
+      mqttClient.publish("audiomixer/ip", ip.c_str()); //Publish own ip
+      mqttClient.subscribe("audiomixer/main/volume/set"); //subscribe to /set, republish without /set
+    } else {
+      Serial.print("failed, rc=");
+      Serial.print(mqttClient.state());
+      Serial.println(" try again in 5 seconds");
+      // Wait 5 seconds before retrying
+      delay(5000);
+    }
+  }
+}
+
+void loop() {
+  if (!mqttClient.connected()) {
+    reconnect();
+  }
+  
+  if (millis() - last_send > PUBLISH_DELAY) {
+    //sendData();
+    last_send = millis();
+  }
+
+  mqttClient.loop();
+}
+
+void sendData() {
+  char msgBuffer[20];
+  float h = 50;
+  float testvalue = 42;
+  /*
+  Serial.print("testvalue: ");
+  Serial.print(testvalue);
+  Serial.println();
+  
+  if (mqttClient.connect(CLIENT_ID)) {
+    mqttClient.publish("audiomixer/messwert/parameter", dtostrf(testvalue, 6, 2, msgBuffer));
+    //mqttClient.publish(DEVICENAME+"/br/nb/deur", (statusBD == HIGH) ? "OPEN" : "CLOSED");
+  }*/
+}
+
+void callback(char* topic, byte* payload, unsigned int length) {
+  Serial.print("Message arrived [");
+  Serial.print(topic);
+  Serial.print("] ");//MQTT_BROKER
+  for (int i = 0; i < length; i++) {
+    Serial.print((char)payload[i]);
+  }
+  Serial.println();
+  
+
+ 
+  //if (strncmp((const char*)payload, "ON", 2) == 0) {
+  //}
+  
+  if (strncmp((const char*)topic, "audiomixer/main/volume/set",sizeof(topic)) == 0) {
+    //Serial.println("republish");
+    mqttClient.publish("audiomixer/main/volume", payload, length );
+  }
+  
+  
+}