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The sad part of using it is you cannot add interrupt features to the project because it uses pin D2 and D3 for software serial communication and those pins are also used by internal interrupts system of the microcontroller.
Also pins D7, D8 and D9 of the Arduino are reserved for incoming call presence, software power up and software reset of the GSM shield.
Smart Cooling system is designed to maintain superior conditions within the refrigerator.
This is why I've tried to build some sort of device based on open-source knowledge that can be replicate by all the hobbyists, even if they are amateurs or professionals. Conclusion: you can build your own basic GSM home automation with less than 100$!
So I begun to think what kind of basic home appliances could be remote controlled via GSM network and nothing else? If you like this instructable please feel free to vote it on each contest it is subscribed! :)For this project I wanted to make a stand-alone Arduino board because I only have one Arduino UNO and I'm using it for my random project, so the need for a clone board was huge.
: DSo if you ask for connections between Arduino clone and other components this is the order:1.
LCD Display is connected through i2c using arduino's A4 (SDA) and A5 (SCL)2.
The BOM of this module is:- 4 x Omron G5LA-14- 4 x BC639 NPN transistors- 4 x 1N4002- 4 x 1k resistors- 4 x screw connector- 1 x 6pins male header That's not much to say about this shield...