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How to programme LDR sensor #include<SoftwareSerial.h> int ldrpin = A0; int ldrvalue = 0; int led = 13; void setup() { Serial.begin(9600); pinMode(led, OUTPUT); } void loop() { ldrvalue = analogRead(ldrpin); delay(1000); Serial.println(ldrvalue); if(ldrvalue <800) { digitalWrite(led,HIGH); } else { digitalWrite(led,LOW); } //delay(800); }

How to programme the LM35 Sensor float final_temp; int raw_temp,led=13; int sensor_pin=A0; void setup() { pinMode(A0,INPUT); pinMode(led,OUTPUT); analogReference(INTERNAL); Serial.begin(9600); } void loop() { raw_temp = analogRead(sensor_pin); final_temp = raw_temp/ 9.31; if(final_temp >=26) { digitalWrite(led,HIGH); } else { digitalWrite(led,LOW); } Serial.println(final_temp); delay(1000); }