Newbie need some help, got stuck for whole day

me and my team mate tried to do a green house system project,
we separate our work to two parts
I did temperature and humidity control
he did LCD screen which showing current temp and humidity . and also an fan control
we were doing great separately.
unfortunately, when we put the codes together, it got stuck.
my idea is :use two relays to control two electrical outlet, one plug with heater, one plug with a humidifier.

and here is my code


#include <dht11.h>

dht11 DHT11;
#define DHT11PIN 7
int pinOut1 = 8;
int pinOut2 = 10;
void setup() 
 {
  Serial.begin(9600);
  pinMode(8,OUTPUT);
  pinMode(9,OUTPUT);
 }

void loop()
{
DHT11.read(DHT11PIN); 
Serial.print("tempetature =");
Serial.print(DHT11.temperature);
Serial.print(" C");
Serial.print('\n');
Serial.print("humidity =");
Serial.print(DHT11.humidity);
Serial.print('\t');
Serial.println("%");
Serial.print('\n');
if (DHT11.temperature <= 20)
   {
  digitalWrite(pinOut1,HIGH);
   }
else{
  digitalWrite(pinOut1,LOW);
    }
   delay( 1000);
   if (DHT11.humidity <= 40)
   {
  digitalWrite(pinOut2,HIGH);
   }
else{
  digitalWrite(pinOut2,LOW);
    }
   delay( 1000);
}

then is his code



#include <Wire.h>     
#include "rgb_lcd.h"  
#include "DHT.h"      
#define DHTPIN   A0
#define DHTTYPE  DHT11
 
DHT dht11(DHTPIN, DHTTYPE);
 
rgb_lcd lcd;

int fan = 10;
 
void setup() 

{
  
  Serial.begin(9800);
  
  pinMode(fan, OUTPUT);
  
  Serial.begin(9600);
 
  lcd.begin(16, 2);
 
  dht11.begin();

}
 
void loop() 

{
  
  int pot = analogRead(A0); 
  
  int fan_speed = pot * (255 / 1023.0); 
 
  analogWrite(fan,fan_speed); 
  
  Serial.println(fan_speed); 
  
  delay(10); 
  
  char _buffer[14];
 
  int humi = dht11.readHumidity() * 10;
 
  int temp = dht11.readTemperature() * 10;
 
  
  if(temp < 0)   
   
    sprintf(_buffer, "TEMP =-%02u.%1u%cC", abs(temp)/10, abs(temp) % 10, 223);
  
  else            
    
    sprintf(_buffer, "TEMP = %02u.%1u%cC", temp/10, temp % 10, 223);
  
  lcd.setCursor(0, 0);
  
  lcd.print(_buffer);       
  
  Serial.println(_buffer);  
 
  sprintf(_buffer, "HUMD = %02u.%1u %%", humi/10, humi % 10);
  
  lcd.setCursor(0, 1);
  
  lcd.print(_buffer);       
 
  Serial.println(_buffer); 
 
  delay(2000);

}

when I tried put them together, the pin 8 and pin 9 seems doesn't work, I already tried every thing I can, please help..... :sob:



#include <Wire.h>     
#include "rgb_lcd.h"  
#include "DHT.h"      
#define DHTPIN   A0
#define DHTTYPE  DHT11
 
DHT dht11(DHTPIN, DHTTYPE);
 
rgb_lcd lcd;

int fan = 9;
int pinOut1 = 8;
int pinOut2 = 10;

void setup() 

{
  
  Serial.begin(9800);
  
  pinMode(fan, OUTPUT);
  
  Serial.begin(9600);
 
  lcd.begin(16, 2);
 
  dht11.begin();
  pinMode(8,OUTPUT);
  pinMode(9,OUTPUT);


}
 
void loop() 

{
  
  int pot = analogRead(A0); 
  
  int fan_speed = pot * (255 / 1023.0); 
 
  analogWrite(fan,fan_speed); 
  
  Serial.println(fan_speed); 
  
  delay(10); 
  
  char _buffer[14];
 
  int humi = dht11.readHumidity() * 10;
 
  int temp = dht11.readTemperature() * 10;
 
  
  if(temp < 0)   
   
    sprintf(_buffer, "TEMP =-%02u.%1u%cC", abs(temp)/10, abs(temp) % 10, 223);
  
  else            
    
    sprintf(_buffer, "TEMP = %02u.%1u%cC", temp/10, temp % 10, 223);
  
  lcd.setCursor(0, 0);
  
  lcd.print(_buffer);       
  
  Serial.println(_buffer);  
 
  sprintf(_buffer, "HUMD = %02u.%1u %%", humi/10, humi % 10);
  
  lcd.setCursor(0, 1);
  
  lcd.print(_buffer);       
 
  Serial.println(_buffer); 
 
  delay(2000);

  if ( temp <= 20)
   {
  digitalWrite(pinOut1,HIGH);
   }
else{
  digitalWrite(pinOut1,LOW);
    }
   delay( 1000);
   if (humi<= 40)
   {
  digitalWrite(pinOut2,HIGH);
   }
else{
  digitalWrite(pinOut2,LOW);
    }
   delay( 1000);


}

thanks if you can have a look

Please edit your post, select a code and click the </> button to apply so-called code tags; repeat for the other codes that you posted. And next save your post.

It makes it easier to read, easier to copy and prevents the forum software from incorrect interpretation of the code.

What do you connect to A0, the DTH11 or a pot?
Set the #define DHT11PIN back to the really used pin.

Hi, @turnfanfan
Welcome to the forum.

Please read the post at the start of any forum , entitled "How to use this Forum".

This will help with advice on how to present your code and problems.

Can you please post your circuit diagram as well, in a new post?

Thanks.. Tom... :smiley: :+1: :coffee: :australia:

DTH 11 actually

thanks for reply

thanks for help