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Postby 0lzi » Sat Jun 10, 2017 9:03 pm

Hi

New to the Raspberry pi world but i wanted to dig in, , my project is essentially a baby monitor with camera and temp display.

I spotted this sensor and have followed the guide on the page (link to product ) https://www.modmypi.com/raspberry-pi/breakout-boards/52pi/temperature-sensor-lm75

i have it displaying the temperature ( done some tweaks so it doesn't convert to *F ) but notices its way off the ambient temperature of the room, im putting it down to the head radiating from the CPU chip on the board as it is quite close to the board.

Now the ambient of the room is at 20.5 based on my pre-existing room temp display, and the 'vcgencmd measure_temp' displaying the cpu temp at 52.1'C and the sensor is reading 38.875.

if anyone can think of a way to compensate for the cpu temp as i spotted this http://yaab-arduino.blogspot.co.uk/2016/08/accurate-temperature-reading-sensehat.html and it brings it closer to accurate but still a good 8-10'C out

0lzi
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Postby BMS Doug » Mon Jun 12, 2017 8:41 am

How about moving the sensor away from the Pi?

Add 5 male to female jumper wires to extend the sensor.

BMS Doug
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