An Electron App to turn my 'OnAir' light on and off.
It's really simple. Hit the button and it changes the Off
to On
and sends a single UDP4 packet to the sign on port 4444 with either OFF
or ON
. The sign has an ESP8266 with a latching relay on it. It just executes the On/Off command by toggling a GPIO pin to control the latching relay.