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Smart alarm system: control ESP32-CAM with Alexa app or web interface

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This alarm system can be built quickly with just a few components. In addition to Alexa integration, it supports alarming by phone call and sending e-mails with an attached picture. Both ease of use and the avoidance of false alarms are important. In this project I use an infrared motion detection module to detect possible intruders. It is also possible to easily expand the system with door and window sensors – for example with battery-operated ESP12 modules in the Deep-SleepMode, which report alarms to the ESP32-CAM via WLAN. The schematic and the program are can be found in my github.

The alarm system is based on the Espalexa-Library that emulates a Philips Hue device so that it can be recognized by Amazon’s voice assistant on the network. This allows the alarm system to be switched on and off using Alexa voice commands. This has proven to be very convenient and practical.

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Alternatively, the system can be controlled via the Alexa app or a web interface. As in the face recognition project, the URL trigger service comes from to use. Here, however, I use it to start alarm routines, such as playing an alarm sound or switching the light.

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