Hi @prettylucky, I use the presence sensor from SmartThings to activate several no smart things, the presence sensor that comes with the kit does not works fine to use it like presence device, but it is very small and works with 3v, many devices uses 3v like candles, if your candle have a digital button, you can use this method, the sensor have a little speaker to location, I use that call to trigger other things like my spray aroma, you can use the device battery and check the level. If you have some presence sensor without use them, you can try