PyPortal and temperature sensor Moderators: adafruit_support_bill, adafruit

[gordonmeyer]

Greetings. I want to use a PyPortal to display a room's temperature, but I'm finding that having the display (backlight) turned on severely impacts the accuracy of the temperature reading. Is this a known issue or am I just missing some obvious way to resolve this? The attached spike in 5-minute samples shows how having the display turned on makes the reading shoot up. Thanks in advance for any advice.

temp reading

Screen Shot 2020-05-12 at 10.56.53 AM.png (57.18 KiB) Viewed 21 times

[adafruit_support_carter]

Yep, that's known. Here's an example of a project that selectively turns the backlight on to help with this:

https://learn.adafruit.com/pyportal-sma ... aq-3023075

[gordonmeyer]

Ah, thanks for confirming. Clever solution.

[gordonmeyer]

For anyone who reads this in the future, based on the sample code above, what I am doing is using touch instead of the light sensor (the light sensor isn't very reliable for me, either) and then, after turning off the screen, waiting for two minutes before recording another measure. This seems to be long enough to allow the temperature sensor to return to normal after the screen is off.