Error Code - More questions... about ccs811

[delsol25]

Hello again,
Really sorry to distrub, I think I just got a bad sensor. I tested with another one and everything is fine.
I also updated the firmware . 2 on 2.
Thanks

[maarten-pennings]

As you can see in the .h file
ERRSTAT is a merge of two hardware registers: ERROR_ID (bits 15-8) and STATUS (bits 7-0)

So, we have to split the hex value 2899 and the string (--VhXmrwF--AD-iE).
ERROR has hex value 28 which corresponds to --VhXmrw and
STATUS has hex value 99 which corresponds to F--AD-iE
Capitals mean bit-is-set, lowercase means bit-is-clear, dash means bit has no meaning.
See function CCS811::errstat_str for details

What does this mean?

Most part of STATUS is ok (see datasheet page 18 on ams.com/ccs811): The F tells that the firmware is in application mode (not bootmode) , the A means that the application image is valid (flashed correctly), D means there is new measurement data. But you also have an E - for Error. This should not happen.

When you have an E/error, the ERROR register gives details. You have V and X (datasheet page 24); X meaning "The sensor resistance measurement has reached or exceeded the maximum range". I'm not sure what does means, maybe your sensor is indeed broken.

[maarten-pennings]

If you are happy, you can close the issue.