SLWF-08 HDMI Controller

The Smartlight SLWF‑08 is a HDMI‑CEC controller that, when used with ESPHome or Home Assistant, allows you to query the status of HDMI‑CEC-compatible devices and send control commands (e.g., power on/off, volume control, input switching, etc.). This solution is ideal for integrating the control of your TV or media player into your smart home hub, provided the device supports HDMI‑CEC.

Note: you must flash the appropriate ESPHome firmware onto the controller yourself (firmware compilation required). The device also offers additional functionality, such as WS2812B LED strip control, making it ideal for ambient lighting—e.g., behind a TV.

About the Brand

Smartlight is a manufacturer specializing in smart home devices, offering Wi-Fi controllers, LED strips, and other DIY multimedia/home automation tools. Their products typically support open platforms (e.g., ESPHome, Tasmota), making them suitable for users with technical knowledge who seek customizable solutions.

Main Features

• HDMI‑CEC Support: enables status querying and command sending to HDMI‑CEC compatible devices (e.g., TVs, media players)
• Firmware: ESPHome-based – requires custom firmware build
• GPIO Setup: HDMI‑CEC signal on GPIO14
• WS2812B LED Strip Control: dedicated pin (GPIO12) with level shifter for addressable LED strips (ambient lighting)
• USB Communication: USB‑Type‑C port for flashing and firmware updates
• Additional Firmware Support: also compatible with Tasmota firmware for both HDMI‑CEC and LED strip control

Smart Home Protocols and Platform Compatibility

• Protocol: HDMI‑CEC – used for control and device status feedback
• Firmware Platforms: ESPHome, Tasmota
• Integration: compatible with Home Assistant / ESPHome systems
• GPIO Mapping: HDMI‑CEC on GPIO14, LED strip control on GPIO12

Smart Functions

• Send HDMI‑CEC commands: power on/off, volume control, input switching (no video passthrough)
• Query device status via HDMI‑CEC
• Control WS2812B LED strips as ambient lighting
• Firmware updates via OTA or USB‑Type‑C
• Custom configurations using ESPHome or Tasmota (YAML-based)

Technical Specifications

• Controller chip: ESP8266 (ESP-12F module)
• Power supply: 5V (via USB‑Type‑C)
• HDMI‑CEC GPIO: GPIO14
• LED strip control GPIO: GPIO12 (with WS2812B support)
• USB/UART chip: CH9102
• Firmware compatibility: ESPHome, Tasmota
• CEC support: for HDMI‑CEC compatible devices only
• Dimensions: approx. 40×25 mm
• Communication: Wi‑Fi 802.11b/g/n

Additional information