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Use your arduino to control remote controlled sockets by SMJ.
Cheap Home Automation.
Use an Arduino to control power-sockets in your home.
Step 1: Get a pack of "SMJ remote controlled sockets".
Step 2: Allocate channels (A-D) and buttons (1-3) to lamps and gizmo's around your home.
Step 3: Connect an Arduino to an Aurel Wireless RTX-MID-3V transceiver (see code for mapping).
Step 4: Load sketch on your Arduino (v11 is latest).
Step 5: Place batch file (Windows). Your com port might not be com3.
Step 6: Set up windows task scheduler. Get fancy...
The C-Bus Module is used to provide a C-code API between a Clipsal C-Bus PCI interface, and an application program. Application programs can be on small embedded micros with no OS and only a few K of RAM, thru to Windows & Linux.
PLCduino is an open hardware alternative for industrial and home automation. It uses the well known ATmega chips as main processor, the same used on Arduino. This means that PLCduino is code-compatible with all arduino sketches.