Found it… it’s inside:
/usr/share/hassio/homeassistant/esphome/custom_components/
ok.
is it working for you?
I have it in /config/custom_components where other homeassistant custom components are
No, you are right it is in /config/esphome/custom_components
Yes, seem to work, thanks for your hint 
. I have all temperature, humidity, VOC, CO2 sensors active. Just that IAQ Accuracy looks to be still staying in Calibrating state since more than 1h. Not sure how long will take until it determine a final value.
I got this all up and running, but I think there may be a bug… I noticed that the temperature sensor stops updating whilst all other metrics continue to update. Anyone else experienced that?
In my case all sensors work fine.
Calibrating takes some time. In the beginning it takes some hours.
The sensor is always recalibrating when you open the window.
I´ watching it now for a while and after opening the windows IAQ goes down and the sensor starts calibrating --> after this the IAQ values in my room are high but they go down after a while.
I´m not sure how exact the sensor is
Right, after testing the bme680_bsec for a while noticed that many time it stays in calibrating, and also sometimes stays many time un Uncertain state, which not sure how to interpret, if is reliable to trust values when in uncertain state or not.
Has any tried the latest BSEC library with raspberry pi yet? I mean the version 2.4.0.0 from The BSEC Software | Bosch Sensortec.
How do I install this on raspberry pi?
Hi, I have recently integrated my BME680 hosted on RPi Zero W into Home Assistant using BSEC v2.5.0.2. On top of the fresh BSEC release, I have implemented publishing the values to a configured MQTT broker. No Python wrappers, only pure C, compiled on the RPi itself. If anyone is interested, I can upload and share the source code.
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Hi Sergey could you please share how you were able to do this? Thanks in advance.