Hi, I am creating a automated plant watering system. The only problem I am having is that my water pump does not want to turn off when the moisture sensor reads that the soil is moist. Below is my code. If anyone can help me out it would be greatly appreciated.
String writeAPIKey = "dCFFuwutXLRoHKQNqbIXrP"; //Put your ThingSpeak Write API key here.
unsigned int interval = 60000; //Update every Minute
long int now=0, previous=-50000; //Used to hold time variables.
#define DST_IP "maker.ifttt.com" //Thingspeak Server
//LCD display
//Load libraries
#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
//Define address for the Serial LCD display.
#define I2C_ADDR 0x27 //If 0x3f doesn't work change this to 0x27
#define BACKLIGHT_PIN 3
//Initialise the Serial LCD.
LiquidCrystal_I2C lcd(I2C_ADDR, 2,1,0,4,5,6,7); //These pin numbers are hard coded in on the serial backpack board.
// Moisture sensor
int moistureSensor = A3; // moisture sensor is plugged into A3 on the arduino
int data; // Used to store data from user
int waitTime = 1000;
// water pump
int pumpPin = 8; // water pump
void setup() { // put your setup code here, to run once:
// Moisture Sensor
Serial.begin(9600);
// LCD display
lcd.begin (16,2); //Initalize the LCD.
lcd.setBacklightPin(3,POSITIVE);//Setup the backlight.
lcd.setBacklight(HIGH); //Switch on the backlight.
lcd.clear();
lcd.setCursor(4,0); //go to first column and first line (0,0)
lcd.print("Moisture"); //Print at cursor Location
lcd.setCursor(5,1); //goto first column and second line
delay(1000);
// pump
pinMode(pumpPin, OUTPUT);
// Wifi
Serial.begin(9600); // Open serial Connection to Computer
Serial1.begin(115200); // Open serial Connection to ESP8266
Serial.println("IFTTT Maker");
Serial1.println("AT+RST"); //Issue Reset Command
Serial.println("AT+RST");
delay(1000);
//DEBUG LOOP- display ESP output to serial Monitor.
while (Serial1.available()) {
Serial.println(Serial1.read());
}
Serial.println("AT+CWMODE=1");
Serial1.println("AT+CWMODE=1"); //Set single client mode.
delay(5000);
Serial.println("AT+CIFSR");
Serial1.println("AT+CIFSR"); //Display IP Information
//DEBUG LOOP- display ESP output to serial Monitor.
while (Serial1.available()) {
Serial.println(Serial1.read());
}
delay(1000);
Serial.println("AT+CIPMUX=0");
Serial1.println("AT+CIPMUX=0"); //Sets up Single connection mode.
delay(1000);
//DEBUG LOOP- display ESP output to serial Monitor.
while (Serial1.available()) {
Serial.write(Serial1.read());
}
delay(1000);
}
void loop() { // put your main code here, to run repeatedly:
// Moisture
delay(waitTime);
data = analogRead(moistureSensor);
data = map(data, 0, 1023, 0, 100);
Serial.println(data);
// LCD
for(int count = 0; count < 15; count++) {
lcd.clear();
lcd.setCursor(7,0);
lcd.print(data);
delay(500);
}
// pumpPin
if (data <= 1023) {
digitalWrite(pumpPin, HIGH);
} else {
digitalWrite(pumpPin, LOW);
} // end of if pump
// IFTTT
now=millis(); //Get the current time.
//Check to see if it's time to run.
if(now - previous >= interval){
previous = now;
Serial.println("Running Update");
updateThingSpeak();
}
}
void updateThingSpeak(){
int moisture = analogRead(moistureSensor); //Read the moisture
//Builds the connection string for the ESP8266
String cmd = "AT+CIPSTART=\"TCP\",\"";
cmd += DST_IP;
cmd += "\",80";
Serial1.println(cmd); //Run the command
Serial.println(cmd); //Print this to the debug window
delay(1000);
//DEBUG LOOP- display ESP output to serial Monitor.
while (Serial1.available()) {
Serial.write(Serial1.read());
}
//I NEED TO UPDATE THIS IF STATEMENT TO MAKE SURE CONNECTION WORKED
//if (client.connect(thingSpeakAddress, 80)){
String httpcmd="GET/trigger/arnold_the_plant/with/key/dCFFuwutXLRoHKQNqbIXrP?";
httpcmd += "value1=";
httpcmd += moisture;
httpcmd += " HTTP/1.1\r\n";
httpcmd += "Host: maker.ifttt.com\n";
httpcmd += "Connection: close\r\n\r\n";
Serial.print("AT+CIPSEND=");
Serial.println(httpcmd.length());
Serial1.print("AT+CIPSEND=");
Serial1.println(httpcmd.length());
delay(1000);
Serial.print(">");
Serial1.println(httpcmd);
Serial.println(httpcmd);
delay(3000);
//DEBUG LOOP- display ESP output to serial Monitor.
while (Serial1.available()) {
Serial.write(Serial1.read());
}
Serial.println("AT+CIPCLOSE");
Serial1.println("AT+CIPCLOSE"); //Close the Web Connection
} // end of void loop
You might want to run the pump for a certain amount of seconds, and then have a timeout of say 15 minutes before you check moisture again. Moisture sensors and soil take time to settle.
Not sure what sensor you got. Most bare/resistive ones are very unreliable and temp dependent.
Are you sure 1023 (maximum A/D) is what the sensor outputs if plants need watering.
You might want to test with the raw A/D data first, before you map it to 0-100%? for the LCD.
Leo..
belbin09:
digitalWrite(pumpPin, HIGH);
delay(waterTime1000); // water for 10 seconds
delay(waterWait60000);
This doesn't look right either: if "waterWait*60000" causes a delay of 60 minutes as the comment below suggests, then you could be watering for over an hour. Or did you mean seconds?
Perhaps something like this was what you were aiming for:
// pumpPin
if (data <= 40) {
digitalWrite(pumpPin, HIGH);
delay(waterTime*1000); // water for 10 seconds
digitalWrite(pumpPin, LOW);
}
delay(waterWait*60000); // delay the water pump for 60 minutes to read the moisture again
BTW, it would be better to post your entire code again (using code tags) if you have made changes.
arduarn:
This doesn't look right either: if "waterWait*60000" causes a delay of 60 minutes as the comment below suggests, then you could be watering for over an hour. Or did you mean seconds?
Perhaps something like this was what you were aiming for:
// pumpPin
if (data <= 40) {
digitalWrite(pumpPin, HIGH);
delay(waterTime1000); // water for 10 seconds
digitalWrite(pumpPin, LOW);
}
delay(waterWait60000); // delay the water pump for 60 minutes to read the moisture again
BTW, it would be better to post your entire code again (using code tags) if you have made changes.
Ok so if I just wanted it to read the data and if it was below say 40 to water the plant for 10 seconds and then shut off without the delay how would I go about adjusting my code?
I have the pump now turning off and on every 10 seconds. So now I just need to adjust it to water once the moisture reads low.
String writeAPIKey = "dCFFuwutXLRoHKQNqbIXrP"; //Put your ThingSpeak Write API key here.
unsigned int interval = 60000; //Update every Minute
long int now=0, previous=-50000; //Used to hold time variables.
#define DST_IP "maker.ifttt.com" //Thingspeak Server
//LCD display
//Load libraries
#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
//Define address for the Serial LCD display.
#define I2C_ADDR 0x27 //If 0x3f doesn't work change this to 0x27
#define BACKLIGHT_PIN 3
//Initialise the Serial LCD.
LiquidCrystal_I2C lcd(I2C_ADDR, 2,1,0,4,5,6,7); //These pin numbers are hard coded in on the serial backpack board.
// Moisture sensor
int moistureSensor = A3; // moisture sensor is plugged into A3 on the arduino
int data; // Used to store data from user
int waitTime = 1000;
[b]// water pump
int pumpPin = 8; // water pump
int waterTime = 10; // 10 seconds watering time
[/b]
void setup() { // put your setup code here, to run once:
// Moisture Sensor
Serial.begin(9600);
// LCD display
lcd.begin (16,2); //Initalize the LCD.
lcd.setBacklightPin(3,POSITIVE);//Setup the backlight.
lcd.setBacklight(HIGH); //Switch on the backlight.
lcd.clear();
lcd.setCursor(0,0); //go to first column and first line (0,0)
lcd.print("Hello - Arnold"); //Print at cursor Location
lcd.setCursor(5,1); //goto first column and second line
delay(1000);
// pump
pinMode(pumpPin, OUTPUT);
// Wifi
Serial.begin(9600); // Open serial Connection to Computer
Serial1.begin(115200); // Open serial Connection to ESP8266
Serial.println("IFTTT Maker");
Serial1.println("AT+RST"); //Issue Reset Command
Serial.println("AT+RST");
delay(1000);
//DEBUG LOOP- display ESP output to serial Monitor.
while (Serial1.available()) {
Serial.println(Serial1.read());
}
Serial.println("AT+CWMODE=1");
Serial1.println("AT+CWMODE=1"); //Set single client mode.
delay(5000);
Serial.println("AT+CIFSR");
Serial1.println("AT+CIFSR"); //Display IP Information
//DEBUG LOOP- display ESP output to serial Monitor.
while (Serial1.available()) {
Serial.println(Serial1.read());
}
delay(1000);
Serial.println("AT+CIPMUX=0");
Serial1.println("AT+CIPMUX=0"); //Sets up Single connection mode.
delay(1000);
//DEBUG LOOP- display ESP output to serial Monitor.
while (Serial1.available()) {
Serial.write(Serial1.read());
}
delay(1000);
}
void loop() { // put your main code here, to run repeatedly:
// Moisture
delay(waitTime);
data = analogRead(moistureSensor);
data = map(data, 0, 1023, 0, 100);
Serial.println(data);
// LCD
for(int count = 0; count < 15; count++) {
lcd.clear();
lcd.setCursor(7,0);
lcd.print(data);
delay(500);
}
// pumpPin
[b]if (data <= 60) {
digitalWrite(pumpPin, HIGH);
delay(waterTime*1000);
digitalWrite(pumpPin, LOW);[/b]
}
// IFTTT
now=millis(); //Get the current time.
//Check to see if it's time to run.
if(now - previous >= interval){
previous = now;
Serial.println("Running Update");
updateThingSpeak();
}
}
void updateThingSpeak(){
int moisture = analogRead(moistureSensor); //Read the moisture
//Builds the connection string for the ESP8266
String cmd = "AT+CIPSTART=\"TCP\",\"";
cmd += DST_IP;
cmd += "\",80";
Serial1.println(cmd); //Run the command
Serial.println(cmd); //Print this to the debug window
delay(1000);
//DEBUG LOOP- display ESP output to serial Monitor.
while (Serial1.available()) {
Serial.write(Serial1.read());
}
//I NEED TO UPDATE THIS IF STATEMENT TO MAKE SURE CONNECTION WORKED
//if (client.connect(thingSpeakAddress, 80)){
String httpcmd="GET/trigger/arnold_the_plant/with/key/dCFFuwutXLRoHKQNqbIXrP?";
httpcmd += "value1=";
httpcmd += moisture;
httpcmd += " HTTP/1.1\r\n";
httpcmd += "Host: maker.ifttt.com\n";
httpcmd += "Connection: close\r\n\r\n";
Serial.print("AT+CIPSEND=");
Serial.println(httpcmd.length());
Serial1.print("AT+CIPSEND=");
Serial1.println(httpcmd.length());
delay(1000);
Serial.print(">");
Serial1.println(httpcmd);
Serial.println(httpcmd);
delay(3000);
//DEBUG LOOP- display ESP output to serial Monitor.
while (Serial1.available()) {
Serial.write(Serial1.read());
}
Serial.println("AT+CIPCLOSE");
Serial1.println("AT+CIPCLOSE"); //Close the Web Connection
} // end of void loop
