I am trying to log data from a conductivity sensor to the SD card, for some reason it is not working. here is my code (I try to use code snippet but I could not make it look like how it suppose to be, I will try again when I am not too busy):

#include <Arduino.h>
#include <math.h>
#include <Wire.h>
#include <SD.h>
#include…[Read more]

So I am currently trying to record data in an SD card for 4 environmental sensors. I succesfully manage to record the data in just 1 environmental sensor which is the DHT11 for humidity and temperature, but when I try to record it along with turbidity, pH, and conductivity, it does not…[Read more]

So at the moment I am trying to store data in a SD card, the SD card I am using is the one that came with the mayfly kit and I was trying to test out the simple file example code that the Envirodiy website has. When I try to compile it, it says that the next three things were…[Read more]

So at the moment I am trying to store data in a SD card, the SD card I am using is the one that came with the mayfly kit and I was trying to test out the simple file example code that the Envirodiy website has. When I try to compile it, it says that the next three things were not…[Read more]

Voltage: V+ which is the 5V DC connected to SW5
Ground: Ground to Ground
Analog = PO or PH analog output is connected to the Analog pin A0
I used three resistors to test which one will be close to the voltage required, I will post a picture of the three…[Read more]

here is the code:
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
}

// the loop routine runs over and over showing the voltage on A0
void loop() {
// read the input on analog pin 0:
int sensorValue = analogRead(A0);
// Convert the analog reading (which goes from 0 – 1023) to a voltage…[Read more]