I am testing my monitor / control system for the first time with multiple grove temp sensors: 2 DHT Pro and one digital temp sensor (board type, not the 2-wire). Because of the cable-length issues I’ve encountered (separate thread under this forum), I am using 20cm connections. This puts all 3 sensor devices in very close proximity. In theory, all should read within “tolerance” of one-another.
First observation: temp differed between the 2 DHTs by 1 degree; humidity differed by 4%. That seems “within”.
Second observation: I’m tracking min and max DHT readings, updating those on each cycle (about 1 minute). Min humidity values diverged sharply, suggesting at least one “odd” reading. The outlier was ~ 10% or more lower.
The digital temp board is giving me readings of 70F, while the DHT’s are reading ~80F. That’s way out IMO.
Anybody used multiple temp / humidity sensors with the GrovePi? Is this similar to what you’ve experienced?