Iteration 1 — ESP8266 + Power Bank
- ESP8266 module
- Single channel relay
- External USB power bank
- Wire exiting enclosure
Issues:
- Visible wiring
- Power bank charging dependency
- Not installation-ready
Iteration 2 — ESP32-C3 Upgrade
- Migrated to ESP32-C3 SuperMini
- Lower footprint
- Better efficiency
Improvements:
- Smaller enclosure
- Improved stability
Still required external power bank.
Iteration 3 — Integrated Power Solution
- Located unused 24V rail inside lift PSU
- Added buck converter (24V → 5V USB)
- Fully internalized power system
Results:
- Cleaner install
- No charging dependency
- Closer to production-grade integration