Hello everybody,
I am currently working on a student project using the BME688 sensor for an odor detection prototype, and I would like to ask for clarification regarding the interpretation of a gas resistance reading.
In my setup, I am using a Raspberry Pi with a multiplexer and the Adafruit BME680 Python library. One of my sensors reported a gas resistance value of 5684 ohms. I would like to know whether this value is considered normal for the BME688, or whether it may indicate strong VOC exposure, sensor saturation, or a configuration issue.
My current sensor configuration is:
sensor.temperature_oversample = 8
sensor.humidity_oversample = 2
sensor.pressure_oversample = 4
sensor.filter_size = 3
sensor.set_gas_heater(max_temp, 150)
The heater temperature differs per multiplexer channel and is set to one of the following values: 200°C, 240°C, 280°C, or 320°C, with a heating duration of 150 ms.
The value is read from:
sensor.gas
Could you please explain how a gas resistance reading around 5684 ohms should be interpreted in this context? I would also appreciate any guidance on whether this configuration is suitable for collecting gas resistance data for odor detection experiments.
Thank you for your time and support.