I have 6 arduino's (Uno) connected to dataloggins shields set up to record environmental data with relative humidity, temperature, barometric pressure and light levels. One of them did not record any data over the last week, it never even started recording when I plugged the battery in. However, all the rest of them are fine. if I plug this particular malfunctioning unit into my computer to try and reset the time using the ds1307 sketch it uploads but nothing at all displays on the serial monitor. Then I tried uploading my own personal sketch that records that data from the sensors and the usual beginning message displays... (see below)
Initializing SD card...card initialized.
Writing column headers to bat.csv...done.
Getting environmental data ...
But after this all of my data is supposed to display every 20 sec ...... and nothing! Like I said, all of the rest of my arduino's are functioning just fine with this sketch, and with the serial monitor. The serial monitor is obviously working since it displayed the beginning message, and is letting me upload the sketch. I have no idea where to go from here. Any suggestions?