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lightctl

Action Shot #1

lightctl is a light control system for my 12 V outdoor lights, running on the esp32, written for the esp-idf framework. It serves a practical purpose, and enables me to build something just for the hell of it, out of stuff I had laying around.

lightctl allows for turning the lights on by pressing a button in the UI, or by scheduling 'on' and 'off' times. There's a manual override switch, just in case.

This was done on an ESP32-WROOM on a "DevKitV1" board with 4 MB of flash storage.

Usage

Use idf.py menuconfig and ensure that all the options for lightctl (Component Config -> Light Control) are set according to your needs.

Then, hook up your board and idf.py flash and you should be good to go. There's a small web app running on the builtin http server which allows you to toggle the lights on and off, and set a schedule.

The status led will blink while the esp32 is connecting to the WiFi. Once connected, the led will stay solid.

Override

The override switch pins allow for switching the lights on and off manually. In the "On" position IO34 will go high (IO35 will be pulled low), and the lights will be turned on; regardless of what's selected in the UI.

In the "Off" position, IO35 will go high (IO34 will be pulled low), and the lights will be kept off.

Limitations

I designed this circuit to accomodate a maximum current of up to 500 mA for the lights. If you need more current, you'll have to replace the transitor and base resistor with a configuration appropriate for your needs.

Schematic

Schematic

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Simple WiFi-enabled light control system

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