I like to interface a humidity sensor over the I²C bus.
It should come in a small package, and consume little power. Accuracy isn't that important. I'm using the DS1621 as temperature sensor, I'd like something similar, but for a humidity sensor.
After looking for modules with my criteria, I came across the HYT271, but that thing is ridiculously expensive. The low-cost version HYT371 has about the characteristics I'd need, but it's currently not available from my dealer of choice...
I need something reasonable accurate for ambient temperature measuring, and at the same time not too expensive. Should be in the range of a few euros. (Bonus points if those chips can be sampled).