I want to create a device which will detect a temperature every hour or so in a fridge and send this temperature to a sms text.
I have some experience with the arudino nano but i need this device to be as compact as possible.
Anyone got any ideas??
A fridge is a metal box and it is very difficult if not impossible to get radio signals in or out. So you will need to mount the module that sends the SMS outside the fridge. Ideally, only the temp sensor will be inside.
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Thanks for the response.
Thanks for that i would have never have thought until i tested it, can you send sms texts from an arduino without a sim card with the arduino?
Be sure to find folie cables, not conventional cables. The leakage of air will be bad for the fridge and the economy, electrical costs, wear...
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A Subscriber Identity Module is needed to identify your Arduino to the phone company for billing etc.
How do you propose providing the necessary information to the service provider without a SIM card?
Im not sure if it was possible or not thats why im asking you guys 
There is a wifi connection if that would work/cheaper
Email would also work if its easier/cheaper
Yes, if you have an internet connection and you go through a service like Twilio
Email would probably be simpler and can be done at no cost.
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Great, what type of hardware would i need??
You could also email yourself an SMS, if your phone service provider allows you to do so.
For example, I can email myself an SMS by sending an email to something like myUSphoneNumber@sms.cricketwireless.net
Each carrier has a different @xxxxxx.yyy
Even if it is possible for you, I'm not sure it has any advantage (vs just sending an email to yourself).
I recommend an ESP8266 for email (or ESP32) with the mobizt ESP-Mail-Client library. No need for a Nano or other Arduino. The ESPs are perfectly fine stand-alone devices. And they're inexpensive.
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One could use a thing like the Aduino Nano,
and use
to send the data to and then use an App to access the data on your phone from the Internet.
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the esp doesnt need to be connected to a computer to send an email does it?
No. It just needs a wifi connection.
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