This #Arduino Project can be used to Turn off #Panasonic AC or Any other AC (see IRremoteESP8266) when there is water overflow. Water level can also be #monitored using any pull based #1agent, I am using #telegraf.

TrunOffAcOnOverflow.ino

#include <WiFi.h>
#include <ESPmDNS.h>
#include <WiFiUdp.h>
#include <ArduinoOTA.h>
#include <HCSR04.h>

#include <Arduino.h>
#include <IRremoteESP8266.h>
#include <IRsend.h>
#include <ir_Panasonic.h>
#include <WebServer.h>


const char* ssid = "****";
const char* password = "********";
const int ledPin = BUILTIN_LED;
const int touch = T3;
int trValue = 100;
int cnt = 0;
const uint16_t kIrLed = T0;  // ESP8266 GPIO pin to use. Recommended: 4 (D2).
IRPanasonicAc ac(kIrLed);    // Set the GPIO used for sending messages.

WebServer server(80);

void handleRoot() {
  digitalWrite(ledPin, HIGH);
  char buffer[40];
  sprintf(buffer, "%d", trValue);

  server.send(200, "text/plain", buffer);
  digitalWrite(ledPin, LOW);
}

//no need authentification
void handleNotFound() {
  String message = "File Not Found";
  server.send(404, "text/plain", message);
}

void setup() {
  pinMode(ledPin, OUTPUT);

  Serial.begin(115200);
  Serial.println("Booting");
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.waitForConnectResult() != WL_CONNECTED) {
    Serial.println("Connection Failed! Rebooting...");
    delay(5000);
    ESP.restart();
  }

  // Port defaults to 3232
  ArduinoOTA.setPort(3232);

  // Hostname defaults to esp3232-[MAC]
  ArduinoOTA.setHostname("AC-Level-monitor");

  // No authentication by default
  ArduinoOTA.setPassword("****");

  // Password can be set with it's md5 value as well
  // MD5(admin) = 21232f297a57a5a743894a0e4a801fc3
  // ArduinoOTA.setPasswordHash("21232f297a57a5a743894a0e4a801fc3");

  ArduinoOTA
    .onStart([]() {
      String type;
      if (ArduinoOTA.getCommand() == U_FLASH)
        type = "sketch";
      else  // U_SPIFFS
        type = "filesystem";

      // NOTE: if updating SPIFFS this would be the place to unmount SPIFFS using SPIFFS.end()
      Serial.println("Start updating " + type);
    })
    .onEnd([]() {
      Serial.println("\nEnd");
    })
    .onProgress([](unsigned int progress, unsigned int total) {
      Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
    })
    .onError([](ota_error_t error) {
      Serial.printf("Error[%u]: ", error);
      if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");
      else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");
      else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");
      else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");
      else if (error == OTA_END_ERROR) Serial.println("End Failed");
    });

  ArduinoOTA.begin();

  Serial.println("Ready");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
  ac.begin();
  ac.setModel(kPanasonicCkp);
  server.on("/", handleRoot);
  server.onNotFound(handleNotFound);
  server.begin();
}

void loop() {
  ArduinoOTA.handle();
  server.handleClient();
  trValue = touchRead(touch);
  Serial.println(trValue);

  if (trValue < 20 && cnt > 4) {
#if SEND_PANASONIC_AC
    ac.off();
    ac.send();
#endif
    if(cnt > 6){
      cnt = -100;
    }
  }
  digitalWrite(ledPin, HIGH);
  sleep(1);
  digitalWrite(ledPin, LOW);
  if (trValue < 20) {
    sleep(1);
    cnt = cnt+1;
  } else {
    sleep(5);
    cnt = 0;
  }
}

This #Arduino Project can be used to Turn off #Panasonic AC or Any other AC (see IRremoteESP8266) when there is water overflow if you are using a Bucket in the room to AC collect water. Water level can also be #monitored using any pull based #1agent, I am using #telegraf.