This is an introduction of R242 - RS232 Relay-Daq Board from iknowvations.in. This board is very useful for computer automation. It connects with serial - RS232 port of your computer and can be used to operate 4 on board relays to switch onoff any electrical gadgets and also you can use various kind of sensors like Temperature, Pressure, Magnetic etc to monitor real world situations.br You can make many projects using this R242 - RS232 Relay-Daq Board.