BME688 + BSEC2.0

[wumpel_pumpel]

Hello,

I'm using BME688 (8x) sensor board  and BSEC2.0 lib running on ESP32 to read sensor data.

I'm using the original Arduino code provided with the BSEC2.0 lib (basic_config_state.ino)

(only small adaptation in SPI read/write routines were made in order to comminicate with one from 8 available BME688 sensors)

The general comminication (reading/writing registers) is working properly, the BSEC2.0 lib periodically reports new values,

but after a (very) long run, the read values are far away from the current environment values

and the accuracy still remains 0 (unrelaible):

timestamp = 23736544
iaq = 112.88 (acc: 3)
temperature = 36.09 (acc: 0)
pressure = 100595.15 (acc: 0)
humidity = 25.06 (acc: 0)
gas resistance = 384528.72 (acc: 0)
initialal stabilisation: FINISHED
power ON stabilisation: FINISHED
compensated temperature = 33.09 (acc: 0)
compensated humidity = 29.55 (acc: 0)
gas estimate 1 = 0.00 (acc: 3)
gas estimate 2 = 1.00 (acc: 3)
gas estimate 3 = 0.00 (acc: 3)
gas estimate 4 = 0.00 (acc: 3)
gas index = 9.00

NOTE: as a configuration the default bsec_serialized_configurations_selectivity.h and BSEC_SAMPLE_RATE_HIGH_PERFORMANCE is used.

Any suggestions what here might be wrong?

BR's

  -vitali

[BSTRobin]

Hello wumpel_pumpel,

Which example code you used? There was mode_switching_config_state.ino project under BSEC 2 package folder, did you use it?

[wumpel_pumpel]

Hello,

BSEC2.0 lib was downloaded from:
https://www.bosch-sensortec.com/software-tools/software/BME688-software/

bsec_2-0-6-1_generic_release_04302021.zip

I've used basic_config_state.ino from folder: BSEC_2.0.6.1_Generic_Release_04302021\examples\bsec2\examples

Btw, in the mentioner BSEC2.0 package above only one INO sketch available.

BR's
  -vitali

[BSTRobin · Accepted solution]

Hello wumpel_pumpel,

Do you mean you couldn't find mode_switching_config_state.ino? If yes, you could refer attachment.