![]() I could manually clean the data later or just access the log file after the test is complete, but it is nice to see the data plot update periodically. ![]() ![]() I suspect this might be Excel accessing the log file (via auto refresh every 1 min) the same time as PuTTy and interrupting the communication to the log file. I could ignore this, but it would be good to have the resolution, and I also wonder if there is a better range for the adc, such as 1V to 4V rather than say 2V to 5V? Ever so often, there is a data glitch, it looks like the data in a cell gets truncated or shifted one cell to the right. I thought of using a 10k potentiometer to create a voltage divider, but then I lose one bit of resolution (that would map to about 2.2V to 5V). ![]() (I am reading an analog voltage and printing "millis, value" to serial every 200 ms, it's a very simple program that works great for what I want) Two problems: The voltage I want to measure is likely to range between 25V to 45V. I've come to using PuTTy to capture Arduino's serial data to a log file, and then I have a data connection from Excel to that log file for plotting. ![]()
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