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Saturday, September 4, 2021

Temperature Errata Resolved

I believe the temperature errata has been resolved.  The MCP9600 apparently has a glitch that causes it to return a full-scale reading once in a while.  I checked the data-ready flag processing etc. and found no issues.  Finally (using the new LogFile library) I was able to isolate the problem.  The raw data was coming from the MCP9600 incorrectly.

I was able to confirm that others were having this same issue.  So, I had to resolve the issue in software.  Fortunately, the errant data was uniform and I was able to filter out that particular value.  If that particular value is returned from the MCP9600, I simply poll it again for new data.

This will need to be monitored in a long-term test, but I am confident it is resolved.

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