Hello!
Today I've been working in a easy datalogger with my Arduino Nano. I need to know how a temperature changed along the time (5 hours) and I had a LM35 sensor and the "Nano".
The LM35 series are precision integrated-circuit temperature sensors, with an output voltage linearly proportional to the Centigrade temperature. It's really easy to find and its precision is really good -I evaluated it using a precision termometer and I concluded that I didn't need to gauge my LM35-.
Next step is the wiring. I conected the LM35 to one of the analog input of the Arduino Nano (Pin 2). I used the number 0 (A0) but you can choose whatever you want -We have 8 analog inputs-.
LM35 PIN 1 ------------------------------ 5V OUTPUT ARDUINO NANO
LM35 PIN 2 ------------------------------ ANALOG INPUT 0-7 ARDUINO NANO
LM35 PIN 3 ------------------------------ GND ARDUINO NANO
Arduino Code
float temp1;
const int sensor1 = A0;
int sensorValue = 0;
int time1
= 30000;
float time = 0;
void setup() {
Serial.begin(9600);
}
void loop() {
float sensorValue = analogRead(sensor1);
temperatura1 = (5 * sensorValue * 100.0)/1024.0;
Serial.print(time);
Serial.print("\t");
Serial.println(temp1);
delay (tiempo);
time = (time + ((time1/1000));
}
Notes:
- Measuring period: 30000ms (time1 variable).
- Our data will be showed in "Serial Monitor". ---> Tools -> Serial Monitor.
And finally, I copy&paste all the data compiled in a Excel... to make graphs or calculations. It's really easy and useful. I recomend try it.
See you!
