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Arduino anti-theft alarm shield • Hackaday.io
This project was created on 08/18/2014 and last updated 2 years ago.
This anti-theft alarm is basically an Arduino Mega Shield with fairly complex software.
The system is composed by a main circuit (the arduino shield) installed in an hidden place and an i2c connected...
rfid - How to send arduino data to php code - Stack Exchange
Welcome to SE:Arduino.
Shields are usually designed so that the pins are still fully accessible. The shield has a set of male connectors on the underside and female connectors (same as your Arduino) on the top side. Just Google a pic of a shield and you will see what I mean.
Ethernet is not the only choice, there is...