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HDC2080: Heater operation

ttd
Mastermind 8580 points
Part Number: HDC2080

Dear Technical Support Team,

I'm testing HDC2080EVM with GUI tool.

I'd like to know how to operate the heater. Which operation is correct ,① or ②？

①Should CPU be poling the humidity and control the heater on/off(HEAT_EN) manually?

For example

CPU is poling the interrupt of "Humidity Threshold HIGH" like 100%RH(default) or value of RH .

when CPU detects 100%RH, the CPU turns on the heater(set HEAT_EN=1) to avoid condensation.

②Otherwise, does heater working depends on the interrupt threshold of relative humidity?

For example

when HEAT_EN is enabled, however the heater doesn't work under Humidity Threshold HIGH(default 100%RH) 

When reaching the Humidity Threshold HIGH at 100%RH, heater turns from OFF to ON automatically.

In the same way , dehydration by enabled heater and reaching the Humidity Threshold Low, heater turns from ON to OFF automatically(keeping  HEAT_EN is enabled).

Best Regards,

ttd

  • 0
    TI__Expert 5695 points
    Hi TTD,
    The right mode to enable (and the purpose of doing it) the hater is the one described in your option (1).

    Please keep in mind that the temperature reading will be impacted when you enable the heater since it will give a much higher reading than the ambient one. Once you turned it off and let it rest for few seconds the temperature reading will return be within the expected accuracy.

    Regards,
    Jose
  • 0 in reply to Jose Arteaga4
    Mastermind 8580 points

    Hi Jose,

    Thank you for your reply.

    Do you have a plan for my option② with next version of Sensing Solutions EVM GUI?
    GUI(v1.9.4) can be enabled/disabled heater, and work immediately.
    however it doesn't link with interrupt threshold like Humidity Threshold HIGH.
    So user watch the humidity value or interrupt threshold and control HEAT_EN manually with GUI.
    It is useful for user to manage both interrupt threshold and heater enable through GUI like option②.
    For example, GUI works heater enable automatically when over the Humidity Threshold HIGH.
    (Of course, IC works like option①)

    Best Regards,
    ttd

  • 0 in reply to ttd
    TI__Expert 5695 points
    Hi TTD,
    We are in the process of updating the HDC20XX family GUI in the near future and should consider your suggestion.
    I am closing the post now, let us know when you have other inquiry for these products with a new E2E post.

    Regards,
    Jose