* ESP32 Microcontroller utilizing the WT32-ETH01 Ethernet Module.
* Uses a 40VA 16.5VAC wall transformer with an internal fuse.
* Charges a 12V 7A lead acid battery.

* AC power failure detection.
* 8 supervised zones (Expandable on-board to 16). Using 2K ohm end of line resistors.
* 1 Output for a 12V siren.
* 4 pin JST connector with I2C bus signals and 3.3V
* 8 pin JST connector for future zone expanders.
* 2 12 pin pluggable terminal blocks for zone sensor inputs
* 1 12 pin connector for AC power, AUX power, Siren and Battery connections.
* 3 status LED's show AC power state, siren state, and ESP32 heartbeat
* TVS diodes on all sensor inputs, power, and other external connectors.
* On-board TMP102 Temperature sensor.
* I2C bus repeater on external zone connector.
* Monitoring of battery, auxilliary, and siren voltages using the ESP32 ADC.
* PTC fuse protection on the Battery, Auxillary Power and Siren outputs.