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    BME 680: Minimizing power usage

    BME 680: Minimizing power usage

    New Poster


    I´m working with the BME680 to measure air-quality, with a battery as the power source. To ensure a long lifetime of the device, I wish to decrease the power consumption beyond the ULP mode, accepting that this also will decrease the accuracy somehow.  Do you have any suggestions on what configuration I can set for this, such that it still will work with the IAQ calculations of the BSEC library?

    I noticed that the heating time of the MOX layer was increased almost by a factor 10 when changing from LP to ULP, but when I manually tried to change the heater time, the IAQ was always returned as 0. The resistance seems to follow the same trend as for LP mode, so I assume this should still be possible?

    3 REPLIES 3

    Community Moderator
    Community Moderator

    Hello tbstoro,

    Could we know detailed information from you:
    1.The link address of the software you use;
    2.Software content you modified.


    1. I use the software found in the BSEC, implementing the bsec_iot_example.c  with a microcontroller, and modifying the bsec_integration.c

    2. The modification is simply manually changing the heater time and heater duration in the bsec_bme_settings_t struct, i.e. sensor_settings.heater_time = 200 in the bsec_iot_loop() before the loop starts.

    Thank you for helping!

    Community Moderator
    Community Moderator

    Hello tbstoro,

    You could see supported BSEC configurations from integration guide, implement this function config_load() which copy config file from config folder. By default, it used "generic_18v_300s_4d" configuration.

    uint32_t config_load(uint8_t *config_buffer, uint32_t n_buffer)
    // ...
    // Load a library config from non-volatile memory, if available.
    // Return zero if loading was unsuccessful or no config was available,
    // otherwise return length of loaded config string.
    // ...
    return 0;

    BSEC configuration.png