Lest the code be lost, I’m posting it here for reference:
#include<LiquidCrystal.h>
#include <SoftwareSerial.h>
#define RX 9
#define TX 8
LiquidCrystal lcd(11, 10, 6, 5, 3, 2);
int ms_pin = A0; // Moisture Sensor pin
int trig_pin=13; // TRIG pin of Distance sensor
int echo_pin=12; // ECHO pin of Distance Sensor
int BAUD_RATE=9600;
int output_value ;
String AP = "*********"; // AP NAME
String PASS = "***********"; // AP PASSWORD
String API = "**********"; // Write API KEY
String HOST = "api.thingspeak.com";
String PORT = "80";
int countTrueCommand;
int countTimeCommand;
int T_Level;
boolean found = false;
int valSensor = 1;
SoftwareSerial esp8266(RX,TX);
void setup()
{
lcd.begin(16,2);
lcd.print("IoT based smart");
lcd.setCursor(0,1);
lcd.print("water Irrigation");
delay(2000);
lcd.clear();
lcd.print(" Project Team");
lcd.setCursor(0,1);
lcd.print("Welcomes You");
delay(2000);
// gsmInit();
lcd.clear();
lcd.print("System Ready");
pinMode(4,OUTPUT); // Used to trigger the relay
pinMode(trig_pin, OUTPUT);
pinMode(echo_pin, INPUT);
Serial.begin(BAUD_RATE);
Serial.println("\n\nReadings from the Sensors:");
delay(2000);
lcd.clear();
Serial.begin(9600);
esp8266.begin(115200);
esp8266.println("AT");
Serial.println(esp8266.read());
sendCommand("AT",5,"OK");
sendCommand("AT+CWMODE=1",5,"OK");
sendCommand("AT+CWJAP=\""+ AP +"\",\""+ PASS +"\"",20,"OK");
}
void loop()
{
lcd.setCursor(0,0);
lcd.print("Readings ");
lcd.setCursor(0,1);
lcd.print("from sensors");
delay(3000);
lcd.clear();
output_value= analogRead(ms_pin);
output_value = map(output_value,550,10,0,100);
Serial.print("\n\nMositure : ");
Serial.print(output_value);
Serial.println("%");
lcd.print("Mositure : ");
lcd.print(output_value);
lcd.println("%");
delay(2000);
lcd.clear();
digitalWrite(trig_pin, LOW);
delayMicroseconds(2);
digitalWrite(trig_pin, HIGH);
delayMicroseconds(10);
digitalWrite(trig_pin, LOW);
long duration= pulseIn(echo_pin, HIGH);
int distance= duration/29/2;
lcd.print("Tank level : ");
T_Level=30-distance;
lcd.print(30-distance);
//lcd.println("%");
delay(2000);
lcd.clear();
if(duration == 0)
{
Serial.println("\nWarning: no pulse from sensor");
}
else
{
Serial.print("\nWater level in cm:");
Serial.println( 30 - distance); // Assuming 30 cm is height of tank
}
if(distance > 8)
{
Serial.print("\nTime to Refill the tank");
lcd.print("Time to refill");
lcd.setCursor(0,1);
lcd.print("the tank");
//lcd.println("%");
delay(2000);
lcd.clear();
}
if(output_value < 0)
{
digitalWrite(4,HIGH);
}
else
{
digitalWrite(4,LOW);
}
delay(1000);
String getData = "GET /update?api_key="+ API +"&field1="+output_value+"&field2="+T_Level;
sendCommand("AT+CIPMUX=1",5,"OK");
sendCommand("AT+CIPSTART=0,\"TCP\",\""+ HOST +"\","+ PORT,15,"OK");
sendCommand("AT+CIPSEND=0," +String(getData.length()+4),4,">");
esp8266.println(getData);delay(1500);countTrueCommand++;
sendCommand("AT+CIPCLOSE=0",5,"OK");
}
void sendCommand(String command, int maxTime, char readReplay[]) {
Serial.print(countTrueCommand);
Serial.print(". at command => ");
Serial.print(command);
Serial.print(" ");
while(countTimeCommand < (maxTime*1))
{
esp8266.println(command);//at+cipsend
if(esp8266.find(readReplay))//ok
{
found = true;
break;
}
countTimeCommand++;
}
if(found == true)
{
Serial.println("OYI");
countTrueCommand++;
countTimeCommand = 0;
}
if(found == false)
{
Serial.println("Fail");
countTrueCommand = 0;
countTimeCommand = 0;
}
found = false;
}