Help me with the code UNO RELAY LCD LED LAMP

[vladi_125]

UnoDHT11RelayDisplay16x2 Led lamps №2.ino (1.5 КБ)

This comes out when uploading the code can you me help

[anon56112670]

You did something wrong in the code you didn't post.

[vladi_125]

The code is posted in the article

[anon56112670]

No, it isn't posted.
I wouldn't have commented if it had been.

[apf1979]

Please post it like this.

#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#define DHTPIN 3
#define DHTTYPE DHT11
#define WHITE_LED 5  // pin to which white LED is connected
#define GREEN_LED 6  // pin to which green LED is connected
#define RED_LED 7  // pin to which red LED is connected

LiquidCrystal_I2C lcd (0x27, 20, 3);
DHT dht (DHTPIN, DHTTYPE);


void setup() {
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(WHITE_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);
  pinMode(RED_LED, OUTPUT);
  Serial.begin(9600);
  dht.begin();
  lcd.init();
  lcd.setCursor(0, 0);
  lcd.backlight();
  lcd.print ("Starting LCD...");
  delay (1000);
  lcd.clear();

}

void loop() {

  lcd.setCursor (0, 0);
  lcd.print ("Temp.: ");
  lcd.print (int(dht.readTemperature()));
  lcd.print (" \337C");
  lcd.setCursor (0, 1);
  lcd.print ("Humidity: ");
  lcd.print (int(dht.readHumidity()));
  lcd.print ("%");
  delay (100);

  if (int(dht.readTemperature()) <= 27) {
    digitalWrite(12, HIGH);
    digitalWrite(11, LOW);
  } if (int(dht.readTemperature()) > 27) {

    digitalWrite(12, LOW);
    digitalWrite(11, HIGH);
  }
  If (Temp < 20) {
    digitalWrite(WHITE_LED, HIGH);
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(RED_LED, LOW);
  } if (Temp > 20 & temp. < 30) {
    digitalWrite(WHITE_LED, LOW);
    digitalWrite(GREEN_LED, HIGH);
    digitalWrite(RED_LED, LOW);
  } If(Temp > 30) {
    digitalWrite(WHITE_LED, LOW);
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(RED_LED, HIGH);
  }

  delay(2000);
}
}

[apf1979]

Maybe this part?

If(Temp > 30) {
    digitalWrite(WHITE_LED, LOW);
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(RED_LED, HIGH);
  }

The IF statement is capitalized

if (Temp > 30) {
    digitalWrite(WHITE_LED, LOW);
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(RED_LED, HIGH);
  }

[vladi_125]

Yes

[apf1979]

I rewrote the if statements and removed the extra } at the end of the code. You don't have a DHT.h file attached so fix that and continue.

#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#define DHTPIN 3
#define DHTTYPE DHT11
#define WHITE_LED 5  // pin to which white LED is connected
#define GREEN_LED 6  // pin to which green LED is connected
#define RED_LED 7  // pin to which red LED is connected

LiquidCrystal_I2C lcd (0x27, 20, 3);
DHT dht (DHTPIN, DHTTYPE);


void setup() {
  pinMode(12, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(WHITE_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);
  pinMode(RED_LED, OUTPUT);
  Serial.begin(9600);
  dht.begin();
  lcd.init();
  lcd.setCursor(0, 0);
  lcd.backlight();
  lcd.print ("Starting LCD...");
  delay (1000);
  lcd.clear();

}

void loop() {

  lcd.setCursor (0, 0);
  lcd.print ("Temp.: ");
  lcd.print (int(dht.readTemperature()));
  lcd.print (" \337C");
  lcd.setCursor (0, 1);
  lcd.print ("Humidity: ");
  lcd.print (int(dht.readHumidity()));
  lcd.print ("%");
  delay (100);

  if (int(dht.readTemperature()) <= 27) {
    digitalWrite(12, HIGH);
    digitalWrite(11, LOW);
  }

  if (int(dht.readTemperature()) > 27) {
    digitalWrite(12, LOW);
    digitalWrite(11, HIGH);
  }

  if (Temp < 20) {
    digitalWrite(WHITE_LED, HIGH);
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(RED_LED, LOW);
  }

  if (Temp > 20 & temp. < 30) {
    digitalWrite(WHITE_LED, LOW);
    digitalWrite(GREEN_LED, HIGH);
    digitalWrite(RED_LED, LOW);
  }

  if (Temp > 30) {
    digitalWrite(WHITE_LED, LOW);
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(RED_LED, HIGH);
  }

  delay(2000);
}

[vladi_125]

This is coming out

[apf1979]

Do you have the DHT.h file included in your sketch?

[vladi_125]

@apf1979

Имате ли DHT.h файл, включен във вашата скица?

I think so

[apf1979]

You didn't in the .ino file you attached so I don't think you do. Or maybe it's in a library you don't have. I don't know. You need to go back to the display provider and make sure you have all the correct libraries and code you need.

[vladi_125]

#include <LiquidCrystal_I2C.h>

#include <DHT.h>

#define DHTPIN 3

#define DHTTYPE DHT11

#define WHITE_LED 5 // pin to which white LED is connected

#define GREEN_LED 6 // pin to which green LED is connected

#define RED_LED 7 // pin to which red LED is connected

LiquidCrystal_I2C lcd (0x27, 20, 3);

DHT dht (DHTPIN, DHTTYPE);

void setup() {

pinMode(12, OUTPUT);

pinMode(11, OUTPUT);

pinMode(WHITE_LED, OUTPUT);

pinMode(GREEN_LED, OUTPUT);

pinMode(RED_LED, OUTPUT);

Serial.begin(9600);

dht.begin();

lcd.init();

lcd.setCursor(0,0);

lcd.backlight();

lcd.print ("Starting LCD...");

delay (1000);

lcd.clear();

}

void loop() {

lcd.setCursor (0,0);

lcd.print ("Temp.: ");

lcd.print (int(dht.readTemperature()));

lcd.print (" \337C");

lcd.setCursor (0,1);

lcd.print ("Humidity: ");

lcd.print (int(dht.readHumidity()));

lcd.print ("%");

delay (100);

if (int(dht.readTemperature()) <=27){

digitalWrite(12,HIGH);

digitalWrite(11,LOW);

}if (int(dht.readTemperature()) >27){

digitalWrite(12,LOW);

digitalWrite(11,HIGH);

}

}
This code is tried and tested, I just add a few things

[StefanL38]

If you get a compiler-error provide all details for analysing the error

Hi newcomer, the Arduino-Forum community can be of great help. If the community is able to support you in a way that helps solving your problems depends on detailed information that you should provide. trying to be quick by posting a too short posting is just slowing down finding the solution. Because all that happends is that you are asked for the detailed information and have to provide it anyway. Only difference the answer and the solution comes later The most important thing is to pos…

[vladi_125]

#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#define DHTPIN 3
#define DHTTYPE DHT11
#define WHITE_LED 5  // pin to which white LED is connected
#define GREEN_LED 6  // pin to which green LED is connected
#define RED_LED 7  // pin to which red LED is connected

LiquidCrystal_I2C lcd (0x27, 20, 3);
DHT dht (DHTPIN, DHTTYPE);


void setup() {
  pinMode(12, OUTPUT);
pinMode(11, OUTPUT);
pinMode(WHITE_LED, OUTPUT);
  pinMode(GREEN_LED, OUTPUT);
  pinMode(RED_LED, OUTPUT);
Serial.begin(9600);  
  dht.begin();
lcd.init();
lcd.setCursor(0,0);
lcd.backlight();
lcd.print ("Starting LCD...");
delay (1000);
lcd.clear();

}

void loop() {

 lcd.setCursor (0,0);
lcd.print ("Temp.: ");
lcd.print (int(dht.readTemperature()));
lcd.print (" \337C");
lcd.setCursor (0,1);
lcd.print ("Humidity: ");
lcd.print (int(dht.readHumidity()));
lcd.print ("%");
delay (100);

if (int(dht.readTemperature()) <=27){
  digitalWrite(12,HIGH);
  digitalWrite(11,LOW);
}if (int(dht.readTemperature()) >27){
  
  digitalWrite(12,LOW);
  digitalWrite(11,HIGH);
}
If (Temp < 20){
    digitalWrite(WHITE_LED, HIGH);
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(RED_LED, LOW);
  }if (Temp > 20 & temp. < 30) {
    digitalWrite(WHITE_LED, LOW);
    digitalWrite(GREEN_LED, HIGH);
    digitalWrite(RED_LED, LOW);
  }If(Temp > 30) {
    digitalWrite(WHITE_LED, LOW);
    digitalWrite(GREEN_LED, LOW);
    digitalWrite(RED_LED, HIGH);
  }

  delay(2000);
}
}

[evanmars]

@vladi_125

If (Temp < 20){

Still have the capitalized 'I'.

[anon56112670]

@vladi_125

if (Temp > 20 & temp. < 30)

Two Three problems there, I feel.

[StefanL38]

@anon56112670

@vladi_125

if (Temp > 20 & temp. < 30)

Two Three four problems there

• two variables not declared or different written

• using bitwise AND-operator instead of logical AND-operator

• adding a dot behind a simple variable which would guide into a struct that is not defined and not named

Take a look into this tutorial:

Arduino Programming Course

It is easy to understand and has a good mixture between explaining important concepts and example-codes to get you going. So give it a try and report your opinion about this tutorial.

best regards Stefan

[anon56112670]

Oops - yes, I missed the single '&' (though it ought to have worked as expected)