Published October 29, 2019

How to Use a Datalogger

This project will show you how to use a datalogger and how to registered analog values on a SD card.

BeginnerProtip12 minutes17,829

Things used in this project

Hardware components

Arduino UNO

Datalogger shield

Photo resistor

Resistor 10k ohm

Jumper wires (generic)

Breadboard (generic)

Software apps and online services

Arduino IDE

Story

Functioning and uses

A datalogger is a particular mounting which is able to registered some values on a support ( like SD card ) periodically. In other words, a measure, represented by a value, is realised every N second.

So this system can be used in many projects that need a measurement every N second and that have to record it on a non-volatile memory ( for meteorologist this type of system can be used to make probe like hygrometer or thermometer ).

When you plug your SD card into a computer, a excel file nammed Light is created and all the value of the analog reading appears in a column nammed Brightness value per seconds.

Connections

There are no connections to make between the Arduino UNO and the Datalogger Shield, you only have to plug the datalogger shield on the Arduino UNO.

The code of this project registered on the card the brightness per seconds. The values come from a photoresistor so connections are really simple.

Datalogger code

#include <SPI.h> 
#include <SD.h>  

const char* filename = "Light.csv";

File file;

void setup() {
  Serial.begin(9600);
 
  pinMode(10, OUTPUT); 
  
  if (!SD.begin(10)) {
    Serial.println("Error : Push the reset button");
    for (;;); 
  }
  
  file = SD.open(filename, FILE_WRITE);
 
  if (file.size() == 0) {
    file.println("Brightness value per seconds");
    file.flush();
  }
}

void loop() { 
    measure();
    delay(1000);
}

void measure() {
  int lightvalue = analogRead(A0); 
  Serial.println(lightvalue);
  file.println(lightvalue);
  file.flush();
}

Credits

MisterBotBreak

48 projects • 152 followers

I love electronics and cats :D !

How to Use a Datalogger

Things used in this project

Hardware components

Software apps and online services

Story

Functioning and uses

Connections

Code

Datalogger code

Credits

MisterBotBreak

Comments

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How to Use a Datalogger

How to Use a Datalogger

Things used in this project

Hardware components

Software apps and online services

Story

Functioning and uses

Connections

Code

Datalogger code

Credits

MisterBotBreak

Comments

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