ESP32 ESPHome device that monitors a Carrier furnace — reads a differential pressure sensor for filter restriction and a phototransistor to decode blink error codes from the status LED.

Cable/PCB adapter that converts any VirtualAccess/GW power supply connector to a standard USB-to-TTL/3.3V serial adapter for quick debug access on Westermo GW-series devices.

Daughter PCB that exposes the internal USB port externally on the VirtualAccess GW1152 router from Westermo.