I'm a total newcomer with an interest in data logging but with no recent programming experience. I'm seeing incoming sensor data on the serial monitor but I can't find any advice on importing it to e.g. Excel or a similar graphing program.
This will send "commands.txt" endlessly, with a 10sec pause between sends, and capture the replies to "results.txt". This is all you need to do to turn (say) and RS232 multimeter into a datalogger.
I have written a excel macro that uses the serial port to get data directly. Another solution would be to write a Pc side program in processing to do the same thing