Gera

Oh… Well I decided to leave that thread for later because I wanted to focus on getting something recorded on the SD card. I see now the mistakes I did. I would change to SdFat if it makes things better, I was trying to get something to work first. The code is now working for me. Thank you very much! The Filename issue was the only thing that I…[Read more]

Yes, I am using Mayfly. I am using the built-in microSD card slot. My output I get the values in the serial monitor but nothings gets written into the SD card. The last question is kind of confusing to me, but what I am thinking is that you are asking me if I ever put the code of the SD card somewhere else in this code then yeah, but I still get…[Read more]

I removed Sdfat from it and it did not work either. Should I try with sdFat library only?

I am trying to get a txt file of the data from all four sensors to the SD card. It works when I use the first code for the DHT sensor only, the data is recorded inside the SD card as a txt file and I can open it when I connect the SD card into my laptop to see the contents of it. I use this
to record all the data from the four sensors which is…[Read more]

Alright. I am getting the data right. Thank you for your help.

Also, with the code you provided, if I do not use the voltage divider I can calibrate it to 2.5V if I remove the *2 from the equation. I am first time coder and also the mayfly is something new for me as well, I am learning little by little how this thing works. So the calibration will be right if I use the code without multiplying the 2?

Sorry for the late answer I had some stuff to do.
Okay so, the circuit is connected like this:

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]

The pin is USB5V, I tried using that SW5 as well. I tried using all those slots, all of them gave me the exact same value of 3.73V.

pin A0,

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]