Geiger Counter Program update

This is what I want to do. I want the main Geiger Counter program changed to the new binary format. This involves changing the save function in the main program as well as updating the viewer program as you suggested. The new file will save two bytes for the total count number. You stated:" I can write a function, when viewer will will try to read a file then this function will try to determine whether it's newer format binary .GCP file or older ASCII format .GCP file and will try to plot graph using both files." end quote I would like two simple conversion programs that will input our new binary file and create 1) an ASCII file that is readable by Excel. 2) as ASCII file that is compatible with our older format that will add a 0.0 mR/hr for backward compatibility. That is acceptable. That's two conversions programs. One that converts binary to ascii (.txt) suffix. The second converts binary to ascii with the addition of the 0.0 mR/hr (.GPC) suffix. The new file format saved from the main program should have a different suffix GPD, and the conversion (#2) program creates in a new file using the .GPC format.