Hello everybody,
I want to enhance my heating thermostat by an imp. Therefore I need a temperature sensor which I would like to place in the existing thermostat since there are 3 spare thin wires going from the thermostat to the heating (the imp will be placed near the heating). The distance between the thermostat and the heating is about 3 m. Could you recommend or do you have experience with any temperature sensor in combination with the imp? Would for example a LM35 work out?
Thanks,
Marc
…me again 
Here http://forums.electricimp.com/discussion/comment/8040 I found that someone used a TMP36. I think I will go with that one.
Hi Marc,
If you don’t need more than ~0.5 degree of accuracy, a thermistor is the quickest and least expensive way to get the job done. There’s an instructable on building just such a device here: http://www.instructables.com/id/TempBug-internet-connected-thermometer/
The TMP102 is nice digital sensor we use on a lot of things, if you want more accuracy. Sparkfun has a breakout: https://www.sparkfun.com/products/11931, and we have code: https://github.com/electricimp/reference/tree/master/hardware/tmp112