Microcontroller in the fridge?

Hi!
I’m totally new to this, so i dont know if this is a stupid question or not.
I am going to make a temperature logger for my fridge. I’m just wondering if it is ok to put the actual device in the fridge? Will it get defected or damaged if i do so?

Thanks :slight_smile:

If you check the data sheet section of the docs, you should be able to find the minimum/maximum temperatures. That said, perhaps it’s better to place the photon outside the fridge, and run a sensor in, since you’d then also have better access to power :smile:

thanks, i will check it out. Yeah i was considering it, but wouldn’'t that leave a gap open for the fridge? Then you probably would get warmer air in the fridge?

@hoaben13, the other thing you need to consider is the fridge may act as a Faraday cage and block the wifi signal. Your best bet is to put a Photon in the fridge and see if you can access it. Most fridges don’t get cold enough to stop a Photon from working but they will affect battery performance. Your best bet is to experiment, which is the essence of Making! :wink:

Okay! Yeah i was planning on testing, but wasn’t sure if i could place it in the fridge without making the photon stop working. It’s a school project so its best that my particle photon is going to work all the way. If not i can’t complete the assignment.

@hoaben13, I see the biggest issue being humidity more than temperature. I don’t believe there is any chance of damaging your photon. If it stops working, take it out and give it a few hours to warm up and dry out.

Hi there,

some time ago I created a pool temperature monitor with a Particle and I know that people have modified it to monitor fridges (since they showed me pics and asked me questions).
What they did is basically run the sensor (a thermistor) inside the fridge and left the particle outside.
If this is something you’d like to try, go ahead!
Here is the project (particle code included):

hope it helps
Gustavo.

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I am planning to use the DHT11 Sensor to log temperature. But wouldnt it make an open gap for the fridge, causing warm air to the fridge? Its important for my project that the temperature stays consistent.

I have a similar setup with a mini fridge. The photon is on the outside and a thin wire goes in with the sensor on the inside. If you find small enough wire, the gap between the fridge and the door is insignificant enough to cause a temperature change.

The rubber around the door should also seal off most of the gap if there is one. Give it a try, and if it doesn’t work, you can still decide to stick it in the fridge?

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Or better yet, drill a small pilot hole in the side of your fridge, deposit the sensor through, and seal both side with a dab of silicone.

Let’s not start by destroying stuff when not entirely necessary :wink:

I think you’re fine without it, but if you’re reaaaally worried about it, there’s this stuff:

http://amzn.com/B016DAMMBU

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You can also use a thermocouple which is very thin. For example in combination with the MAX31855 breakout board.

Careful with that, the sides may contain hidden pipes with gas, but if it has external pipes it may be safe.

But you can get flat cables, even cables that claim to handle ethernet, often used to place a accesspoint outside a window in amateur setups :wink:

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