window state sensor (open/closed) with MQTT
prusaprinters
track your state of your house windows with an ESP32 with MQTT:The sensor has a tiny pcb with hall sensors between your window and your handle. These hall sensors track the position of your window with magnets.A seconds pcb is used for the ESP32-S2. The ESP32-S2 is in deep sleep and only wakes up if the handle change the state. The ESP32-S2 also wakes up every 24 hours to inform your home automation about the battery state.You can define alarm rules in your OpenHAB: https://github.com/hggh/window-handle-sensor/blob/master/openhab2/window-state.rules#L53
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