Mims
Posts: 1
Joined: Sat Nov 12, 2016 3:53 pm

Externalised GPIO for precise sense hat temperature

Sat Nov 12, 2016 4:06 pm

Hello,

I plan to buy a sense hat to display temperature, humidity etc. I read on a vendor site that the raspberry pi or the sense hat itself can heat the sense hat and alter the temp.

1) is it true?
2) if true, is there a way to place the sense that away from the pi?

Thanks

vetzki
Posts: 10
Joined: Sat Jul 09, 2016 12:33 pm

Re: Externalised GPIO for precise sense hat temperature

Wed Nov 16, 2016 10:17 am

1) yes its true, at least with pi2 (and with pi3 probably worse)
2) you can use a 40 pin ribbon cable (or 40 male-female jumper wires if you have them lying around) but even then temperatures were to high on my device (about 2 degrees)
In my point of view a seperate sensor for temperature (ds18B20 or ds18S20 ) and for humidity (maybe a am-2302/dht22) are better for this purpose

alphanumeric
Posts: 2121
Joined: Tue Jan 19, 2016 2:17 pm
Location: Sydney, Nova Scotia, Canada

Re: Externalised GPIO for precise sense hat temperature

Fri Nov 18, 2016 8:25 pm

I soldered one of these, https://www.adafruit.com/products/1979 to one of these https://www.adafruit.com/products/2310 and put it between my Pi and sense hat. Temps read normal ambient now. It adds some space between the two boards and adds some shielding between them. I also soldered a Real Time Clock breakout board to it so my Pi keeps perfect time. Win win for me.

Return to “Astro Pi”