![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgx5YY3S2CNMNt9asO8I9XsWM0kRto508tmzZuwNliqwooOuwr7Xy0xTl-k5G0eDUlS97TIYqjgykEuEozYWjQwv1Muy3AE_dzBrtd01oWB1-8_Oirh9ngFLpHeeNwk5-WLIWdQrqH12dGD/s200/2016_KY-019a.jpeg)
The relay is a 5V relay for Arduino. 3V3 also seems to work fine on the 3V3 ESP8266
Connections
S signal ( Pin 5 [labeled on my development module GPIO04 } )+ VCC 3V3
- GND
Program
clsPinRelay = 5
html | <h1>Testing relay KY-019</h1> |
html | Connected to pin | & PinRelay & | <br><br> |
button "Set Pin Relay High", [SetPinRelayHigh]
html | <br><br> |
button "Set Pin Relay Low", [SetPinRelayLow]
html | <br><br> |
button " Exit", [Exit]
html | <br> |
wait
[SetPinRelayLow]
io(po,5,0)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQEyLMfvrTXotlbxWGXEoRz-gVVkzk3yIOFwehtbC6rGjj-OtxlHF6P8t0VNtK3AOQLiqosrOaExQ7f2AvQIqqv2uBPwlFy-0FxCHDx9Dv4MokWdSlvSCsnrT5sZNceQhPpxo7ZC2XC1le/s200/2016_KY-019b.jpeg)
[SetPinRelayHigh]
io(po,5,1)
wait
[Exit]
end
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