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    BME-688 Heater profile Duration

    BME-688 Heater profile Duration

    Shapna
    New Poster

    There are different heater profiles available in the BME688 sensor each with different duration. For example 

    HP- 001

    600.6

    HP- 301

    18.34

    HP- 321

    18.9

    HP- 322

    27.44

    Each of these heater profiles have 10 steps.
    Now how is this duration related with the duty cycles?

     

    2 REPLIES 2

    BSTRobin
    Community Moderator
    Community Moderator

    Hi Shapna,

    You could refer application note from page 18 to page 20 https://www.bosch-sensortec.com/media/boschsensortec/downloads/application_notes_1/bst-bme688-an001....
    A duty cycle includes scanning cycles and sleeping cycles. A duty cycle can contain one or more scanning cycles, as well as one or more sleeping cycles.
    Each scanning cycle can be viewed as one iteration of a heater profile. Therefore, the duration of each scanning cycle is derived from the duration of the heater profile used.

    2023-05-25_15h42_35.png

    Can you explain what this temperature time vector means in the data collected? I understand the temperature part, but the time is pre-determined and how does timebase of 140ms reflect on this?

    "temperatureTimeVectors": [
    [
    210,
    32
    ],
    [
    280,
    2
    ],
    [
    280,
    30
    ],
    [
    350,
    2
    ],
    [
    350,
    30
    ],
    [
    280,
    32
    ],
    [
    210,
    32
    ],
    [
    140,
    32
    ],
    [
    70,
    32
    ],
    [
    140,
    32
    ]
    ]
    }
    ],

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