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  3. Relay with switch

Relay with switch

Scheduled Pinned Locked Moved Development
relayswitch
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  • O Offline
    O Offline
    oded00
    wrote on last edited by
    #1

    Hi

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

    Oded

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    • R Offline
      R Offline
      rvendrame
      Hero Member
      wrote on last edited by
      #2

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

      Home Assistant / Vera Plus UI7
      ESP8266 GW + mySensors 2.3.2
      Alexa / Google Home

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      • O Offline
        O Offline
        oded00
        wrote on last edited by
        #3

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

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        • R Offline
          R Offline
          rvendrame
          Hero Member
          wrote on last edited by
          #4

          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! ;-)

          Home Assistant / Vera Plus UI7
          ESP8266 GW + mySensors 2.3.2
          Alexa / Google Home

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          • D Offline
            D Offline
            deennoo
            wrote on last edited by
            #5

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

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