I have to develop a project where I have to sense the temperature inside a fridge and later, send it to Internet. So I have to choose the components and the best way to implement the solution.
- Sensor: I think that the best option is the waterproof sensor from Adafruit https://www.adafruit.com/product/381
What's the best way to send the temperature to internet? Will I have Wifi signal inside the fridge? I've tried to send a whatsapp to my phone which was inside the fridge and I received but... will it work in any case?
Additionaly, I have to send a message if the power supply of the fridge falls down... so I should use the GSM shield. Will I have 3G signal inside the fridge?
What do you think about it? :D