I am trying to create a special datalogger for reading tiny amounts o voltage diff,
however i have 2-3 questions about the datalogging problem.
first: i want to create several logs in the form of
//Open the Data CSV File File dataFile = SD.open("test.txt", FILE_WRITE);
i have tried
File dataFile = SD.open("test"+String(k)+".txt", FILE_WRITE);
but it’s not working
The dates on my output
all the text file on the Sd card are dated 1/1/2000
any ideas how to uses floats on sd?
thank you in advance