Relay with switch

[oded00]

Hi

Is it possible to connect simple relay to regular on/off wall switch?

Oded

[rvendrame]

You have to change some wiring if you have only a single wire availble in the switch box.
Have you checked the Relay project?

[oded00]

In the relay project the button is push button.
Can I use on/off switch with the same sketch?

[rvendrame]

I think you just need to change this line:

if (value != oldValue && value==0) {

to

if (value != oldValue) {

And wire the original switch , in order to short GND and pin 3. The original wires now go to the relay (and not more to the switch).

You need to somehow power arduino + radio + relay , I use cheap phone chargers but the risk of fire is too high. We are testing other alternatives here.

And please be careful when working with AC Mains! It is letal! ;-)

[deennoo]

Thanks for this input, please can you share which kind of relay i have to use ?