17 lines
724 B
Markdown
17 lines
724 B
Markdown
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# Wifi-Relay
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This schematic and code can be used to build up a relay, which can be switched over wifi by sending on/off commands to a MQTT channel.
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## Cicurit / Board
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The cicurit is build upon a ESP-01 (ESP8266) module which GPIO2 pin switches the relay. To program the ESP-01 one may solder a pin socket on the board and put the ESP-01 in, instead of soldering it directly onto the board ;-)
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## Source
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The code is quite simple. It connects to a MQTT broker and subscribes to a channel `/<Hostname>/relay` to recieve the on/off command. The current state of the relay is then published to the channel `/<Hostname>/relay/state`.
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Enjoy.
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