#include <WiFi.h>
#include <PubSubClient.h>
#include "DHT.h"

#define DHTPIN 5     // what pin we're connected to
#define DHTTYPE DHT22 
DHT dht (DHTPIN, DHTTYPE);
void callback(char* subscribetopic, byte* payload, unsigned int
payloadLength);
//-------credentials of IBM Accounts------
#define ORG "5bfis0"//IBM ORGANITION ID
#define DEVICE_TYPE "iot"//Device type mentioned in ibm watson IOT Platform
#define DEVICE_ID "Sensor"//Device ID mentioned in ibm watson IOT Platform
#define TOKEN "yMh*sE(+1rGFErg5UU" //Token
String data3;
char server[] = ORG ".messaging.internetofthings.ibmcloud.com";
char publishTopic[] = "iot-2/evt/Data/fmt/json";
char subscribetopic[] = "iot-2/cmd/test/fmt/String";
char authMethod[] = "use-token-auth";
char token[] = TOKEN;
char clientId[] = "d:" ORG ":" DEVICE_TYPE ":" DEVICE_ID;
WiFiClient wifiClient;
PubSubClient client(server, 1883, callback ,wifiClient);
const int pin1 = 2;
const int pin2 = 13;
#define SOUND_SPEED 0.034
long duration;
float distance;
void setup() {
Serial.begin(115200);
pinMode(pin1, INPUT);
dht.begin();
pinMode(pin2, INPUT);


wificonnect();
mqttconnect();
}
void loop()
{
 int turb = digitalRead(pin1); 
  int val = analogRead(pin2);   
  Serial.println(val);         // reads the value of the potentiometer (value between 0 and 1023)
 int ph = map(val, 0, 1023, 0, 180);     // scale it to use it with the servo (value between 0 and 180)
   Serial.println("ph:"); 
  Serial.println(ph);                // sets the servo position according to the scaled value
  Serial.println("Turbitidity:");
  Serial.println(turb);
  int temp = dht.readTemperature();
  Serial.print("temp:");
  Serial.println(temp);
  
  delay(1000);
 if (turb == 1 || ph>8.5 || ph<6.5 || temp<10|| temp>23) // Check if the pin high or not
  {
    Serial.println("Water is contaminated!");
    Serial.println("ALERT!!");
  }

PublishData(turb,ph,temp);
delay(1000);
if (!client.loop()) {
mqttconnect();
}
delay(1000);
}
void PublishData(int turb,int temp,int ph) {
mqttconnect();
String payload = "{\"ph\":";
payload += temp;
payload += "," "\"turb\":";
payload += turb;
payload += "," "\"temp\":";
payload += ph;
payload += "}";
Serial.print("Sending payload: ");
Serial.println(payload);

if (client.publish(publishTopic, (char*) payload.c_str())) {
Serial.println("Publish ok");
} else {
Serial.println("Publish failed");
}
}
void mqttconnect() {
if (!client.connected()) {
Serial.print("Reconnecting client to ");
Serial.println(server);
while (!!!client.connect(clientId, authMethod, token)) {
Serial.print(".");
delay(500);
}
initManagedDevice();
Serial.println();
}
}
void wificonnect()
{
Serial.println();
Serial.print("Connecting to ");
WiFi.begin("Wokwi-GUEST", "", 6);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void initManagedDevice() {
if (client.subscribe(subscribetopic)) {
Serial.println((subscribetopic));
Serial.println("subscribe to cmd OK");
} else {
Serial.println("subscribe to cmd FAILED");
}
}
void callback(char* subscribetopic, byte* payload, unsigned int payloadLength)
{
Serial.print("callback invoked for topic: ");
Serial.println(subscribetopic);
for (int i = 0; i < payloadLength; i++) {
//Serial.print((char)payload[i]);
data3 += (char)payload[i];
}
Serial.println("data: "+ data3);
data3="";
}