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Kayman
BG484301423 After testing them I need to revise my statement a bit, the sensors are utter crap. Not sure what they are, but they are definitely not calibrated DHT22. Running a test with 3 of this units, a separate DHT22 and a reference thermo sensor both the reference and single DHT22 show the correct temperature (around 21 degrees) whereas the three modules float between 24 and 28 degrees. That's not just a bit out of spec, that's an awful lot beyond expectations. While the image shows some marking that indicates it's a genuine AM2302, the delivered ones are just blank, and the sensor is about a quarter of the size of a genuine AM2302. So it looks like pretty cheap knockoffs. Fun to experiment with, as long as you are not going to trust the readings.I can reuse the boards and place some genuine sensors on it instead, but if you don't want to take the efforts you better stay away from these.