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Hi @maren , you should try to do some basic I2C communication with the sensors to see if the bus is working. This should be done without using the BME680 libraries. In Arduino IDE use the Wire library directly. You can try to read the chip ID register 0xD0. Then you will see if the communication works or if it doesn't.. From there you can narrow down the error. Elektrix ... View more

Hi maren, if you use a library for a 8-bit platform like the adafruit library or a arduino library you cannot read the IAQ values as these are calculated values from the raw data of the gas sensor. This works only on 32-bit controllers. If you want to read the IAQ values you have to use a 32-bit controller like the Cortex M0 (Arduino Zero or Adafruit Feather M0 Express or Adafruit ItsyBitsy M0 Express in my case) and the BSEC library. You can get the library precompiled for different platforms like Arduino IDE. In the current version it is able to read two sensors. This is what I did. Hope this helps Elextrix ... View more

Thank you very much for your answer. I already read this document and this is why I am asking. On page 8 it says: "The vent hole of the sensor shall be covered with a silicone-free protective layer during processing (e.g. cleaning, soldering, board wash etc.) to prevent possible contamination" Can you clarifiy this point? Is it dependant on which reflow process is used? ... View more

Hello kgoveas thanks for the info. Do you already know when the update will be available? My project is stalled at the moment. Best regards Elektrix ... View more