HDC2022: measurement time

Crane Shao

Part Number: HDC2022

Tool/software:

Hello,

In one-shot mode, after triggering the measurement, how much to wait before reading the sensor data so as to get valid reading?

I didn't find that it is specified in the data sheet. But this value seems affecting the reading of valid data.

Thanks!

Crane

2 months ago

0 Alex Thompson 2 months ago

TI__Expert 8225 points

Crane,

The minimum amount of time required to wait after triggering the measurement is specified in the datasheet as the conversion time.

If trying to read both temp and humidity, you will need to wait at least the combined conversion time for the measurements to complete. To be safe, a 2ms wait time can be used.

Thanks

-Alex Thompson

0 Crane Shao 2 months ago in reply to Alex Thompson

Intellectual 845 points

Hi Alex,

Ok got it. Would it work to rely on data ready status instead of waiting for measurement completion?

Thanks!

Crane

0 Alex Thompson 2 months ago in reply to Crane Shao

TI__Expert 8225 points

Crane,

Yes you can use the DRDY_STATUS (bit 7) bit in the Status register (addr 0x04) to see if the data is ready if that is easier.

Thanks

-Alex Thompson

0 Crane Shao 2 months ago in reply to Alex Thompson

Intellectual 845 points

Yes it looks working.

Thanks Alex!

Crane

Sensors

Sensors forum

HDC2022: measurement time