Meet Apex Sentinel.

Apex can leave additional alarm conditions without a new notification while an earlier alarm is awaiting acknowledgment. Apex Sentinel independently monitors alarm states and can send its own notifications. The software is free; you supply the ESP32 hardware.

Important: the black Sentinel box in the illustration is a visual mockup only. No finished black enclosure or preassembled Sentinel device is included or sold. You must purchase your own compatible ESP32 board. The hardware required for this project is linked below; software will be provided free when released.
View required ESP32 hardware on Amazon ↗

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