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hc-12

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Low-power ESP8266 long-range mailbox notification system with motion detection & magnetic sensor. Sends real-time notifications to Home Assistant & mobile devices. Battery-powered with deep sleep optimization. Perfect for smart home automation & mail delivery tracking. Standalone or optional ESPHome integration.

  • Updated Dec 17, 2025
  • C++

In the developing nations, road accidents are the significant reasons for death. For instance, if we look at the main 10 risky roads in the world, we can see that every one of them is a mountainous road. In the mountain roads, there will be tight bends and the roads will be restricted. In these sorts of circumstances, the driver of a vehicle can…

  • Updated Jan 29, 2022

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