Nextion Display - Teil 4 - Integration in FHEM und Node-RED

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <PubSubClient.h>
#include <Nextion.h>

#define WIFI_DISCONNECTED false
#define WIFI_CONNECTED true

#define PAGE_HOME 1
#define PAGE_JUNK 2

const char* mqtt_server = "192.168.178.11";
const char* ssid = "PlitschPlatsch";
const char* password = "PASSWORD";

WiFiClient net;
PubSubClient client(net);

// Page Home

NexPage pHome = NexPage(0, 0, "page0"); // Page Home

NexGauge zLeft = NexGauge(0, 4, "zLeft"); // Gauge left
NexGauge zRight = NexGauge(0, 3, "zRight"); // Gauge right
NexGauge zTop = NexGauge(0, 1, "zTop"); // Gauge top

NexText tTop = NexText(0, 5, "tTop"); // Text top

NexPicture pWiFi = NexPicture(0, 2, "pWiFi"); // Picture WiFi

NexButton bOnoff = NexButton(0, 6, "bOnoff"); // Button On Off
NexButton bJunkPage = NexButton(0, 7, "bJunkPage"); // Button Junk Page

// Page Junk

NexPage pJunk = NexPage(1, 0, "page1"); // Page Junk

NexButton bBackHome = NexButton(1, 5, "bBackHome"); // Button On Off

NexText tJunkGrey = NexText(1, 1, "tJunkGrey"); // Text Junk Grey
NexText tJunkYellow = NexText(1, 2, "tJunkYellow"); // Text Junk Yellow
NexText tJunkBlue = NexText(1, 3, "tJunkBlue"); // Text Junk Blue
NexText tJunkGreen = NexText(1, 4, "tJunkGreen"); // Text Junk Green

// Touch Event Objects

NexTouch *nexListenList[] = {
  &bOnoff,
  &bJunkPage,
  &bBackHome,
  NULL // String terminated
};

bool valueChanged = false;
bool pageChanged = false;
bool wifiChanged = false;

bool wifiState = WIFI_DISCONNECTED;

uint32_t currentPage = PAGE_HOME;

uint32_t gaugeLeft = 0;
uint32_t gaugeRight = 0;
uint32_t gaugeTop = 0;

uint32_t junkGrey = 0;
uint32_t junkYellow = 0;
uint32_t junkBlue = 0;
uint32_t junkGreen = 0;

void setup() {
  pinMode(BUILTIN_LED, OUTPUT);
  digitalWrite(BUILTIN_LED, HIGH); // Turn OFF internal LED

  Serial.begin(9600);

  nexInit();

  bOnoff.attachPush(bOnoffPushCallback);
  bOnoff.attachPop(bOnoffPopCallback);
  bJunkPage.attachPush(bJunkPagePushCallback);
  bJunkPage.attachPop(bJunkPagePopCallback);

  bBackHome.attachPush(bBackHomePushCallback);
  bBackHome.attachPop(bBackHomePopCallback);

  connect();

  valueChanged = true;
}

void loop() {
  if (!client.connected()) {
    if (wifiState == WIFI_CONNECTED) {
      wifiChanged = true;
    }

    wifiState = WIFI_DISCONNECTED;
    reconnect();
  } else {
    if (wifiState == WIFI_DISCONNECTED) {
      wifiChanged = true;
    }

    wifiState = WIFI_CONNECTED;
  }

  nexLoop(nexListenList); // Check touch events
  client.loop();
  refreshDisplay();

  delay(10);
}

void refreshDisplay()
{
  if (valueChanged || pageChanged || wifiChanged) {
    digitalWrite(BUILTIN_LED, LOW); // Turn ON internal LED

    if (currentPage == PAGE_HOME) {
      zLeft.setValue(calculateGaugeValue(gaugeLeft));
      zRight.setValue(calculateGaugeValue(gaugeRight));
      zTop.setValue(calculateTopGaugeValue(gaugeTop));
      tTop.setText(String(gaugeTop, DEC).c_str());

      if (wifiState == WIFI_CONNECTED) {
        pWiFi.setPic(2);
      } else if (wifiState == WIFI_DISCONNECTED) {
        pWiFi.setPic(1);
      }
    }

    if (currentPage == PAGE_JUNK) {
      tJunkGrey.setText(String(junkGrey, DEC).c_str());
      tJunkYellow.setText(String(junkYellow, DEC).c_str());
      tJunkBlue.setText(String(junkBlue, DEC).c_str());
      tJunkGreen.setText(String(junkGreen, DEC).c_str());
    }

    valueChanged = false;
    pageChanged = false;
    wifiChanged = false;

    digitalWrite(BUILTIN_LED, HIGH); // Turn OFF internal LED
  }
}

void connect() {
  WiFi.mode(WIFI_AP_STA);
  WiFi.begin(ssid, password);

  // WiFi
  while (WiFi.waitForConnectResult() != WL_CONNECTED) {
    WiFi.begin(ssid, password);
  }

  // MQTT
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

uint32_t calculateGaugeValue(uint32_t val) {
  if (val < 45) {
    return val + 315;
  } else if (val > 270) {
    return 225;
  } else {
    return val - 45;
  }
}

uint32_t calculateTopGaugeValue(uint32_t val) {
  val += 30;

  if (val > 150) {
    return 150;
  } else {
    return val;
  }
}

void callback(char* topic, byte* payload, unsigned int length) {
  String sTopic = String(topic);

  // Workaround to get int from payload
  payload[length] = '\0';
  uint32_t value = String((char*)payload).toInt();

  if (sTopic == "/SmartHome/Buero/Display/left") {
    gaugeLeft = value;
  } else if (sTopic == "/SmartHome/Buero/Display/right") {
    gaugeRight = value;
  } else if (sTopic == "/SmartHome/Buero/Display/top") {
    gaugeTop = value;
  } else if (sTopic == "/SmartHome/Buero/Display/junk/grey") {
    junkGrey = value;
  } else if (sTopic == "/SmartHome/Buero/Display/junk/yellow") {
    junkYellow = value;
  } else if (sTopic == "/SmartHome/Buero/Display/junk/blue") {
    junkBlue = value;
  } else if (sTopic == "/SmartHome/Buero/Display/junk/green") {
    junkGreen = value;
  }

  valueChanged = true;
}

void reconnect() {
  while (!client.connected()) {
    String clientId = "WemosNextion-";
    clientId += String(random(0xffff), HEX);

    if (client.connect(clientId.c_str())) {
      client.subscribe("/SmartHome/Buero/Display/left");
      client.subscribe("/SmartHome/Buero/Display/right");
      client.subscribe("/SmartHome/Buero/Display/top");

      client.subscribe("/SmartHome/Buero/Display/junk/grey");
      client.subscribe("/SmartHome/Buero/Display/junk/yellow");
      client.subscribe("/SmartHome/Buero/Display/junk/blue");
      client.subscribe("/SmartHome/Buero/Display/junk/green");
    } else {
      delay(5000);
    }
  }
}

void bOnoffPushCallback(void *ptr) {
  digitalWrite(BUILTIN_LED, LOW); // Turn ON internal LED
}

void bOnoffPopCallback(void *ptr) {
  client.publish("/SmartHome/Buero/Display/buttonPressed", "onOff");
  digitalWrite(BUILTIN_LED, HIGH); // Turn OFF internal LED
}

void bJunkPagePushCallback(void *ptr) {
}

void bJunkPagePopCallback(void *ptr) {
  client.publish("/SmartHome/Buero/Display/buttonPressed", "junkPage");

  pJunk.show();
  pageChanged = true;
  currentPage = PAGE_JUNK;
}

void bBackHomePushCallback(void *ptr) {
}

void bBackHomePopCallback(void *ptr) {
  client.publish("/SmartHome/Buero/Display/buttonPressed", "backHome");

  pHome.show();
  pageChanged = true;
  currentPage = PAGE_HOME;
}