Selftest error 0x0004 about embedded-i2c-scd4x

[MBjoern]

Hi AnttiLukats

Thank you for using the SCD40 Sensor and our repository.

The failure most likely results from an untight sensor cavity. Most likely, the sensor was handled roughly. Please respect the reflow soldering max. parameters and don’t touch the white protection layer on top ot the cap at any time.

[AnttiLukats]

We did de-solder and re-solder the SCD40 once, but as gently as possible. I don't think we touched the protective layer too much, but I also can't say we did not touch at all, it's hard to say.

Could overtemperature cause the error 0x0004 ?

[MBjoern]

Hi AnttiLukats

Using the defined parameters, also the referenced max. temperature, are very important when handling the SCD40. Please refere to the datasheet of the sensor for more information regarding the correct soldering parameter ranges.

[MBjoern]

As there was no activity on this issue, i'll close it. Feel free to reopen or open another issue, if you need any further assistance.

Keep prototyping, We'll love to see your projects in the field.