/*
* Connect 4 DHT sensor to a single NANO
*
* 25 April 2022
*
*/
/*
* include libraries *
*/
// include DHT library
#include <DHT.h>
#include <DHT_U.h>
// Pin Assignment for DHT Sensors
#define DHTPIN01 2 // Assign pin 02 for DHT 01
#define DHTPIN02 3 // Assign pin 03 for DHT 02
#define DHTPIN03 4 // Assign pin 04 for DHT 03
#define DHTPIN04 5 // Assign pin 04 for DHT 04
#define DHTTYPE DHT22
DHT dht01(DHTPIN01, DHTTYPE); // Define an Object called DHT (dht01)
DHT dht02(DHTPIN02, DHTTYPE); // Define an Object called DHT (dht02)
DHT dht03(DHTPIN03, DHTTYPE); // Define an Object called DHT (dht03)
DHT dht04(DHTPIN04, DHTTYPE); // Define an Object called DHT (dht02)
float boardHUMID01;
float boardHUMID02;
float boardHUMID03;
float boardHUMID04;
float boardTEMP01;
float boardTEMP02;
float boardTEMP03;
float boardTEMP04;
void setup(){
Serial.begin(9600);
delay(2000);
dht01.begin(); // Start DHT 01
delay(500);
Serial.println("DHT 01 Ready ");
dht02.begin(); // Start DHT 02
delay(500);
Serial.println("DHT 02 Ready ");
dht03.begin(); // Start DHT 03
delay(300);
Serial.println("DHT 03 Ready ");
dht04.begin(); // Start DHT 04
delay(500);
Serial.println("DHT 04 Ready ");
}
void loop(){
delay(2000);
boardTEMP01 = dht01.readTemperature(); // Assign DHT 01 temp value to boardTEMP01
boardTEMP02 = dht02.readTemperature();
boardTEMP03 = dht03.readTemperature();
boardTEMP04 = dht04.readTemperature();
boardHUMID01 = dht01.readHumidity();
boardHUMID02 = dht02.readHumidity();
boardHUMID03 = dht03.readHumidity();
boardHUMID04 = dht04.readHumidity();
Serial.println("Sensor 01:");
Serial.print("Temp: =");
Serial.print(boardTEMP01);
Serial.print(" Humidity:=");
Serial.println(boardHUMID01);
Serial.println("Sensor 02:");
Serial.print("Temp: =");
Serial.print(boardTEMP02);
Serial.print(" Humidity:=");
Serial.println(boardHUMID02);
Serial.println("Sensor 03:");
Serial.print("Temp: =");
Serial.print(boardTEMP03);
Serial.print(" Humidity:=");
Serial.println(boardHUMID03);
Serial.println("Sensor 04:");
Serial.print("Temp: =");
Serial.print(boardTEMP04);
Serial.print(" Humidity:=");
Serial.println(boardHUMID04);
}