my project is [Automatic AC Temperature Controller using Arduino, DHT11 and IR Blaster]. The problem is my Temperature, humidity have negative value and cant reading the temperature AC. How to fix this problem. Im new to arduino. Please Help.
My Code project
/*
* Automatic AC Temperature control using Arduino and TSOP
* Code by: Aswinth Raj B
* Dated: 25-10-2017
* Website: www.circuitdigest.com
*
S.No: Component Pin Arduino Pin
1 OLED – Vcc 5V
2 OLED – Gnd Gnd
3 OLED- SCK, D0,SCL,CLK 4
4 OLED- SDA, D1,MOSI, Data 3
5 OLED- RES, RST,RESET 7
6 OLED- DC, A0 5
7 OLED- CS, Chip Select 6
8 DHT11 – Vcc 5V
9 DHT11 – Gnd Gnd
10 DHT11 – Signal 13
11 TSOP – Vcc 5V
12 TSOP – Gnd Gnd
13 IR Led – Anode 9
14 IR Led – Cathode Gnd
*/
#include <IRremote.h> //Lib for IT Blaster and TSOP
#include <SPI.h> // Inbuilt Lib
#include <Wire.h> //Inbuilt Lib
#include <Adafruit_GFX.h> //Lib for OLED
#include <Adafruit_SSD1306.h> //Lib for OLED
#include <dht.h> //Library for dht11 Temperature and Humidity sensor (Download from Link in article)
// Assign pins for OLED (Software config.)
#define OLED_MOSI 3
#define OLED_CLK 4
#define OLED_DC 5
#define OLED_CS 6
#define OLED_RESET 7
Adafruit_SSD1306 display(OLED_MOSI, OLED_CLK, OLED_DC, OLED_RESET, OLED_CS);
#define SSD1306_LCDHEIGHT 64 //Change if you are using a Different OLED
#define DHT11_PIN 13 //Sensor output pin is connected to pin 13
dht DHT; //Sensor object named as DHT
#define Desired_temperature 27 //The desired temperature is 27*C at any time
//Decoded Remote Signals For my AC ##CHANGE IT FOR YOUR REMOTE
unsigned int ACoff[] = {4600,2500, 400,400, 350,950, 350,950, 350,400, 350,1000, 300,400, 350,400, 350,400, 350,400, 350,950, 350,400, 300,450, 300,1000, 350,400, 300,450, 300,450, 300,400, 350,1000, 300,400, 350,400, 350,950, 350,400, 350,1000, 300,400, 350,1000, 300,400, 350,400, 350,400, 350,400, 350,950, 350,400, 350,400, 350,950, 350,950, 350,400, 350,400, 350,400, 350,950, 350,400, 300,1000, 350,400, 350,400, 300,450, 300,1000, 300,450, 300,450, 300,1000, 300,1000, 350};
unsigned int ACon[] = {4600,2500, 400,400, 300,1000, 350,950, 350,400, 350,950, 350,400, 350,400, 350,400, 300,450, 300,1000, 350,400, 300,450, 300,1000, 300,450, 300,400, 350,400, 350,950, 350,950, 350,450, 300,400, 350,1000, 300,400, 350,1000, 300,450, 300,1000, 300,450, 300,400, 350,400, 350,400, 350,950, 350,400, 350,400, 350,950, 350,900, 400,400, 350,400, 350,400, 350,950, 350,400, 350,950, 350,400, 350,400, 300,450, 300,1000, 350,400, 300,450, 300,1000, 300,1000, 350};
unsigned int Temp23[] = {4600,2500, 400,400, 350,950, 350,1000, 300,400, 350,1000, 300,450, 300,400, 350,400, 350,400, 350,950, 350,400, 350,400, 350,950, 350,400, 350,400, 300,450, 300,450, 300,400, 350,1000, 300,400, 350,1000, 300,400, 350,1000, 300,450, 300,1000, 300,450, 300,400, 350,400, 350,400, 350,950, 350,400, 350,400, 350,950, 350,950, 350,400, 350,400, 350,400, 350,950, 350,400, 350,950, 350,400, 350,400, 350,400, 300,1000, 350,400, 350,400, 300,1000, 350,950, 350};
unsigned int Temp24[] = {4550,2550, 350,450, 300,1000, 300,1000, 350,400, 350,950, 350,400, 350,400, 300,450, 300,450, 300,1000, 300,450, 300,400, 350,1000, 300,400, 350,400, 350,400, 350,400, 350,400, 350,950, 350,400, 300,1000, 350,400, 350,950, 350,400, 350,950, 350,400, 350,400, 300,450, 300,450, 300,1000, 300,450, 300,400, 350,1000, 300,1000, 350,400, 300,450, 300,400, 350,1000, 300,400, 350,1000, 300,450, 300,400, 350,400, 350,950, 350,400, 350,400, 350,950, 350,1000, 300};
unsigned int Temp25[] = {4550,2550, 400,400, 300,1000, 350,950, 350,400, 350,950, 350,400, 350,400, 350,400, 300,450, 300,1000, 350,400, 300,450, 300,1000, 300,450, 300,400, 350,400, 350,1000, 300,400, 350,1000, 300,400, 350,1000, 300,450, 300,1000, 300,450, 300,1000, 300,450, 300,400, 350,400, 350,400, 350,950, 350,400, 350,400, 350,950, 350,950, 350,400, 350,400, 350,400, 350,950, 350,400, 350,950, 350,400, 350,400, 350,400, 300,1000, 350,400, 350,400, 300,1000, 300,1000, 350};
unsigned int Temp26[] = {4550,2550, 400,400, 300,1000, 350,950, 350,400, 350,950, 350,400, 350,400, 350,400, 300,450, 300,1000, 300,450, 300,400, 350,1000, 300,450, 300,400, 350,400, 350,950, 350,400, 350,950, 350,400, 350,1000, 300,400, 350,1000, 300,400, 350,1000, 300,400, 350,400, 350,400, 350,400, 350,950, 350,400, 350,400, 300,1000, 350,950, 350,400, 350,400, 350,400, 300,1000, 350,400, 350,950, 350,400, 350,400, 300,450, 300,1000, 300,450, 300,450, 300,1000, 300,1000, 350};
unsigned int Temp27[] = {4600,2500, 350,450, 300,1000, 350,950, 350,400, 350,950, 350,400, 350,400, 350,400, 350,400, 300,1000, 300,450, 300,450, 300,1000, 300,450, 300,400, 350,400, 350,400, 350,950, 350,1000, 300,400, 350,1000, 300,400, 350,1000, 300,450, 300,1000, 300,450, 300,400, 350,400, 350,400, 350,950, 350,400, 350,400, 350,950, 350,950, 350,400, 350,400, 350,400, 350,950, 350,400, 350,950, 350,400, 350,400, 350,400, 300,1000, 350,400, 300,450, 300,1000, 350,950, 350};
unsigned int Temp28[] = {4550,2550, 350,450, 300,1000, 300,1000, 350,400, 300,1000, 350,400, 350,400, 350,400, 300,450, 300,1000, 300,450, 300,400, 350,1000, 300,400, 350,400, 350,400, 350,400, 350,950, 350,950, 350,400, 350,950, 350,400, 350,1000, 300,400, 350,1000, 300,400, 350,400, 350,400, 350,400, 350,950, 350,400, 350,400, 300,1000, 350,950, 350,400, 350,400, 350,400, 300,1000, 350,400, 300,1000, 350,400, 350,400, 300,450, 300,1000, 300,450, 300,450, 300,1000, 300,1000, 300};
unsigned int Temp29[] = {4550,2550, 350,400, 350,1000, 300,1000, 300,450, 300,1000, 350,400, 350,400, 300,450, 300,400, 350,1000, 300,400, 350,400, 350,950, 350,400, 350,400, 350,400, 350,950, 350,950, 350,1000, 300,400, 350,1000, 300,450, 300,1000, 300,450, 300,1000, 300,450, 300,400, 350,400, 350,400, 350,950, 350,400, 350,400, 350,950, 350,1000, 300,400, 350,400, 350,400, 350,950, 350,400, 350,950, 350,400, 350,400, 350,400, 300,1000, 350,400, 350,400, 300,1000, 300,1000, 350};
unsigned int Temp30[] = {4600,2500, 400,400, 350,1000, 300,1000, 300,450, 300,1000, 300,450, 300,400, 350,400, 350,400, 350,950, 350,400, 350,400, 350,950, 350,400, 350,400, 350,400, 300,1000, 350,950, 350,950, 350,400, 350,1000, 300,400, 350,1000, 300,400, 350,1000, 300,400, 350,400, 350,400, 350,400, 350,950, 350,400, 350,400, 350,950, 350,950, 350,400, 350,400, 350,400, 300,1000, 350,400, 300,1000, 350,400, 350,400, 300,450, 300,1000, 300,450, 300,450, 300,1000, 300,1000, 350};
//Change it for your remote
IRsend irsend;
int Measured_temp;
int Measured_Humi;
int AC_Temp;
char temp_error = 2;
int Pev_value;
boolean AC = false;
int khz = 38; // 38kHz carrier frequency for the NEC protocol
void setup()
{
Serial.begin(9600);
display.begin(SSD1306_SWITCHCAPVCC);
display.clearDisplay();
}
void loop() {
DHT.read11(DHT11_PIN); //Read the Temp and Humidity
Measured_temp = DHT.temperature + temp_error;
Measured_Humi = DHT.humidity;
// text display tests
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.print("Temperature: "); display.print(Measured_temp);display.println("C");
display.setCursor(0,10);
display.print("Humidity: "); display.print(Measured_Humi);display.println("%");
display.setCursor(0,20);
display.print("AC Temp: "); display.print(AC_Temp);display.println("C");
display.display();
delay(500);
display.clearDisplay();
if ((Measured_temp <= (Desired_temperature-3)) && AC == true) //If AC is turned on and temperature is less than 3 degree of Desired value #24 turn off
{
irsend.sendRaw(ACoff, sizeof(ACoff) / sizeof(ACoff[0]), khz); delay(2000);//Send signal to Turn Off the AC
AC_Temp = 0; AC=false;
}
if ((Measured_temp >= Desired_temperature+4) && AC == false) //If AC is off and measured Temp is greater than Desired Temp
{
irsend.sendRaw(ACon, sizeof(ACon) / sizeof(ACon[0]), khz); delay(2000); //Send Signal to Turn On the AC
delay(2000);
irsend.sendRaw(Temp27, sizeof(Temp27) / sizeof(Temp27[0]), khz); //Send signal to set 27*C
AC_Temp = 27; AC=true;
}
if ( Measured_temp != Pev_value) //Change the temperature only if the measured voltage value changes
{
if (Measured_temp == Desired_temperature+3) //If AC is ON and measured temp is very very high than desired
{
irsend.sendRaw(Temp24, sizeof(Temp24) / sizeof(Temp24[0]), khz); delay(2000);//Send signal to set 24*C
AC_Temp = 24;
}
if (Measured_temp == Desired_temperature+2) //If AC is ON and measured temp is very high than desired
{
irsend.sendRaw(Temp25, sizeof(Temp25) / sizeof(Temp25[0]), khz); delay(2000);//Send signal to set 25*C
AC_Temp = 25;
}
if (Measured_temp == Desired_temperature+1) //If AC is ON and measured temp is very high than desired
{
irsend.sendRaw(Temp26, sizeof(Temp26) / sizeof(Temp26[0]), khz); delay(2000);//Send signal to set 26*C
AC_Temp = 26;
}
if (Measured_temp == 27 ) //If AC is ON and measured temp is desired value
{
irsend.sendRaw(Temp27, sizeof(Temp27) / sizeof(Temp27[0]), khz); //Send signal to set 27*C
AC_Temp = 27;
}
if (Measured_temp == Desired_temperature-1) //If AC is ON and measured temp is low than desired value
{
irsend.sendRaw(Temp28, sizeof(Temp28) / sizeof(Temp28[0]), khz); delay(2000);//Send signal to set 28*C
AC_Temp = 28;
}
if (Measured_temp == Desired_temperature-2 ) //If AC is ON and measured temp is very low than desired value
{
irsend.sendRaw(Temp29, sizeof(Temp29) / sizeof(Temp29[0]), khz); delay(2000);//Send signal to set 29*C
AC_Temp = 29;
}
if (Measured_temp == Desired_temperature-3 ) //If AC is ON and measured temp is very very low desired value
{
irsend.sendRaw(Temp30, sizeof(Temp30) / sizeof(Temp30[0]), khz); delay(2000);//Send signal to set 30*C
AC_Temp = 30;
}
}
Pev_value = Measured_temp;
}
if this problem is due to route circuit please tell me or may be due to loose connection
| S.No: | Component Pin | Arduino Pin |
|---|---|---|
| 1 | OLED – Vcc | 5V |
| 2 | OLED – Gnd | Gnd |
| 3 | OLED- SCK, D0,SCL,CLK | 4 |
| 4 | OLED- SDA, D1,MOSI, Data | 3 |
| 5 | OLED- RES, RST,RESET | 7 |
| 6 | OLED- DC, A0 | 5 |
| 7 | OLED- CS, Chip Select | 6 |
| 8 | DHT11 – Vcc | 5V |
| 9 | DHT11 – Gnd | Gnd |
| 10 | DHT11 – Signal | 13 |
| 11 | TSOP – Vcc | 5V |
| 12 | TSOP – Gnd | Gnd |
| 13 | IR Led – Anode | 9 |
| 14 | IR Led – Cathode | Gnd |
