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Description: This is a breakout board for Honeywell’s HIH-4030 humidity sensor. The HIH-4030 measures relative humidity (%RH) and delivers it as an analog output voltage. You can connect the output of the sensor directly to an ADC on a microcontroller; and, thanks to the sensor’s near linear voltage output, the data is very easy to process.
Voltage applied to the supply pins should be within 4-5.8VDC, and optimally at 5V. The sensor will typically only consume about 200μA.
This product comes as shown in the picture, with the HIH-4030 soldered onto the breakout board. The pins of the 3-pin header are spaced by 0.1".
Dimensions: 0.75 x 0.30 “ (19.05 x 7.62 mm)
Based on 3 ratings:
We are using this module to monitor humidity in data centers. Works well for our requirements.
The tiny mounting board is a challenge. The surface mount joints are so close to the pin holes that you can unsolder the chip while soldering 3 sockets. I wasted a lot of time on that and on finding software online that gave accurate readings. Finally did it, though. I only bought 2 of these because I have had failures with cheaper DHT22s (at 100% humidity they fail). Maybe the HIH will too???
it took a little bit of work, but I got this thing working and giving accurate humidity readings!
two things to be aware of:
first, it is sensitive to light and exposure to light can throw your readings way off.
second, the code in the Bildr tutorial isn’t right. read the comments in the Bildr tutorial for details, or just go off the datasheet to derive the transform function.