A 12-year arc of MagiQuest wand projects — from a DigiSpark ATtiny85 duel kiosk in 2013, through NeoPixel ring upgrades and a learn/simulate device, to a 2025 ESPHome Home Assistant sensor.

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.

Secure garage door access via a Wiegand keypad wired to an ESP32 running ESPHome — PINs are stored as hashes in the config, never in plaintext.

Two ESPHome configs for a SONOFF S31 smart plug that auto power-cycles a device when it stops responding — one using ICMP ping loss detection, one using Home Assistant API connection loss.