Well this is the sketch which does all those things at once plus you can control something with humidity, temperature or moisture of the soil.
The sketch
#include <dht11.h> dht11 DHT11; #define DHT11PIN 2 int led1 = 3; int led2 = 4; int led3 = 5; void setup() { Serial.begin(9600); Serial.println("DHT11 TEST PROGRAM "); Serial.print("LIBRARY VERSION: "); Serial.println(DHT11LIB_VERSION); Serial.println(); pinMode (led1,OUTPUT); pinMode (led2,OUTPUT); } void loop() { Serial.println("\n"); int chk = DHT11.read(DHT11PIN); Serial.print("Read sensor: "); switch (chk) { case DHTLIB_OK: Serial.println("OK "); break; case DHTLIB_ERROR_CHECKSUM: Serial.println("Checksum error"); break; case DHTLIB_ERROR_TIMEOUT: Serial.println("Time out error"); break; default: Serial.println("Unknown error"); break; } int sensorValue = analogRead(A3); Serial.print("Humidity = "); Serial.print((float)DHT11.humidity); Serial.println(" (%)"); Serial.print("Temperature = "); Serial.print((float)DHT11.temperature); Serial.print(" (C) "); Serial.println(" "); Serial.print("Soil Moisture Sensor = "); Serial.print(sensorValue); if (DHT11.humidity >60){ digitalWrite (led1, HIGH); } else { digitalWrite (led1, LOW); } if (DHT11.temperature >30){ digitalWrite (led2, HIGH); } else { digitalWrite (led2, LOW); } if (sensorValue >=500){ digitalWrite(led3, HIGH); } else { digitalWrite(led3, LOW); } delay(3000); } |
Pins:
A3 which is analogue pin 3 in the arduino, if you want you can change the pin but make sure you change the pin in the code ( int sensorValue = analogRead(A3); ) as well.
Pin 2 is for DHT11
Pin 3 is for first led which is controlled by humidity.
Pin 4 is for second led which is controlled by temperature.
Pin 5 is for third led which is controlled by soil moisture sensor.
Note:
One thing I've noticed with the soil moisture sensor is that when I connected the vcc with 3v it was getting readings up to 715 but when I connected the vcc to 5v it started getting readings 1000+ so don't really know what going on but it's up to you which ever wire you want to connect with.
Tags:
Dht11 and soil moisture code
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