Smart WiFi lighting controller for outdoor use, based on ESP-WROOM-02 and isolated relays. Remotely control facade and post lights via UDP or MQTT, with safe AC–DC separation.
LuxCtrl is a WiFi-enabled smart lighting controller designed to automate outdoor lights (facade and post lights). Built around the ESP-WROOM-02, it features:
- 2 isolated relay channels for controlling 230 VAC loads.
- Power domain separation (opto-isolated control + ferrite decoupling).
- Integrated 12 V and 3.3 V regulation using IRM-10-12 and buck converter.
- Smart control via UDP (Raspberry Pi) and MQTT (mobile app).
- Visual feedback with onboard LEDs for power and relay states.
- ✅ Dual AC relay output (for facade and post lights).
- ✅ Optocouplers (SFH617A-1) for galvanic isolation.
- ✅ ESP-WROOM-02 soldered directly on PCB.
- ✅ Onboard buck converter for 3.3 V supply.
- ✅ Power On + Relay status LEDs.
- ✅ PE pad for safe chassis grounding.
- ✅ Designed for home installations, with wide copper zones (≥6 mm) for AC.
- ✅ Compatible with JLCPCB fabrication (ENIG finish recommended).
| Component | Description |
|---|---|
| ESP-WROOM-02 | WiFi microcontroller module |
| IRM-10-12 | 230 VAC to 12 V isolated power supply |
| Buck Converter | 12 V → 3.3 V step-down for ESP |
| SFH617A-1 | Optocouplers for relay control |
| SRD-12VDC-SL-C | Relays for AC load switching |
| Ferrite Bead | Mass separation (digital ↔ power) |
- Mount the PCB inside a protective enclosure (PE connected).
- Connect AC input (L/N) and outputs to facade and post light circuits.
- Provide AC power and connect the PCB to your WiFi.
- Program the ESP via UART using external USB–Serial adapter.
- Control via:
- Local UDP from Raspberry Pi.
- MQTT broker + mobile app interface.
/hardware: KiCad files, schematics, PCB layout./firmware: ESP code (Arduino / ESP-IDF)./app: Mobile app or MQTT interface.
⚠️ Warning: This board handles mains voltage (230 V AC). Make sure you follow proper safety measures during assembly and installation. Use adequate insulation, PE connection and enclosure. This is not a certified product. This project is provided as is, with no warranty. I am not responsible for damage, accidents, injuries, or failures resulting from improper use, modification, or implementation of this design.
Cesar – Mechatronics & Embedded Systems Engineer
luxctrl ✨