The temperature and humidity data come back to 5 decimals so I was planning to do float. I guess I don't know what the commands are for reading a specific line in a file as well as deleting a specific line. From the examples I can easily read the entire file with myFile.read() but how do I just read one line? Also I can delete an entire file with SD.remove("unwanted.txt") but am not sure how to erase just one line.