Hi, yesterday I got the brand new Enviro+ PHAT. First of all: it is a great thing! But of course, there are some issues: My old weather Station (BME280 + Arduino) reads the following: 29.4 degC, 1014 hPa, 27% humidity… which I thing are real numbers (it’s hot in Germany ricght now). Enviro+ says:…

Hi On mine, I extended the header to move the Eviro+ a small distance away from the Pi. This brings the RH back to normal reading and you can do without any temperature compensation. Phil

This might also be useful to you (to move it even further away) [image] Enviro+ and GPIO ribbon extension Support I would like to move the Enviro+ further away from the RPi itself … partly to avoid the temperature compensation/influence from the RPi CPU just underneath it…

I have used a 90deg angle connector to keep the Enviro+ away from the RPi, but it does not help much. The temperature reading is about 2 to 2.5 deg. too high. The issue (as mentioned in the datasheet) is probably self-heating of the sensor. For weather applications, you are supposed to read it only …

I also mounted my Enviro+ at right angles to the PI 0 and have a tiny 20mm 5V fan blowing on the back of it. That gets the temperature to agree with nearby thermometers to 0.1C. The humidity reading is still low compared to two devices nearby. One shows 61% and the other 63% but the Enviro+ shows 54…

What does the humidity reading show if you turn off the fan?

It is currently 43% with a temperature of 27C and no fan. It makes a difference of around 10%.

Hello, did you solved the Humidity error reading? I have the same issue here. Can you help me out? Thanks.

Enviro+ Humidity Reading

Support

PaulWebster July 3, 2019, 8:16pm 3

This might also be useful to you (to move it even further away)

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Enviro+ Humidity Reading

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