Nice work :) What do you use to activate the door? I think you did say. I've realised it's not goot soldering some parts in just in case they need changing. In fact the reason my temp sensor didn't work last night was because the actual temperature sensor on the board has stopped working.
It's made me make some changes to the software though. Before I was manually inputting the DS18B20 address before flashing, I had to reflash if I wanted to change the sensor. Now it finds the address automatically and lights the LEDs if it can't find one.
I've also changed the sensor interval to 5 minutes from 1 so should save 5 times less data now. Too many points on my graph I think.
So I finally have 2 working sensors. Have to decide where to put this one and also change the software on the Pi so it can show data from more than just one sensor.
My two boards side by side.
Does the heat from the electronics impact your readings at all?
Are you buying the wire specifically for this? Looks quite thick.
I've just been using some solid core CAT6 I have spare.
Not sure, doubt it though. It's only running for a few seconds every 5 minutes. The rest of the time it's sleeping and oly using microamps of power. The temp sensor is sticking up above the board too, or I could replace it with a sensor on a long cable to see of it's any different t.
It's cable I've ripped out of an old PSU. Too chunky, need to find something smaller and easier to use.
I've an idea. You could try some spare pieces of CAT6 cable you may have lying around...
Will Cat5 do? Don't think I have any Cat6.