BSEC error code : -2
This error is related to communication failure, most commonly caused either because of hardware connection or software protocol implementation. For the BME680 to run in I2C mode with secondary I2C address selected as in your post, please make sure that both CSB and SDO pins of your BME680 are connected to its VDDIO (we cannot determine the actual connections based on the picture of your third-party board). If you have access to an oscilloscope or logic analyzer, you could also monitor the communication to the sensor on the I2C bus to determine if what you see corresponds to what your software is trying to do.
... View more