FAQ | RBDIMMER

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DimmerLink Not Detected on I2C: UART Mode Default Issue

Feb 26, 2026

0 162

FAQ

TL;DR: DimmerLink ships from the factory in UART mode . i2cdetect will not show address 0x50 until you send the SWITCH_I2C command ( 02 5B ) over UART at 115200 baud. Also add 4.7 kΩ pull-up resistors...

I2C ac-dimmer dimmerlink troubleshooting

Tasmota AC Dimmer Control via DimmerLink

Feb 26, 2026

0 165

FAQ

TL;DR: Tasmota cannot drive a phase-cut TRIAC dimmer natively. Use DimmerLink as an I2C/UART slave. On ESP32 Tasmota: write a 5-line Berry script that maps any rule trigger to an I2C register write at...

ESP8266 ac-dimmer berry dimmerlink smart-home tasmota tutorial

Raspberry Pi AC Dimmer Control via DimmerLink

Feb 26, 2026

0 165

FAQ

TL;DR: Direct TRIAC phase-cut from Raspberry Pi GPIO is not feasible — Linux OS jitter is 1–10 ms while TRIAC timing requires < 100 µs. Use DimmerLink as a hardware controller: RPi writes a brightness...

ac-dimmer dimmerlink linux python raspberry-pi tutorial

AC Dimmer with Home Assistant: ESPHome and DimmerLink Guide

Feb 26, 2026

0 144

FAQ

TL;DR: Two integration paths exist. Path A (standard ESPHome ac_dimmer platform) is simple but causes ISR/WiFi conflicts on dual-core ESP32. Path B (DimmerLink ESPHome component) offloads TRIAC timing...

ESP32 ac-dimmer dimmerlink home-automation tutorial

ESPHome YAML for AC TRIAC Dimmer: Standard and DimmerLink

Feb 26, 2026

0 188

FAQ

TL;DR: Two ESPHome integration methods exist. The standard ac_dimmer platform works out-of-the-box but has ISR/WiFi conflicts on ESP32. The DimmerLink external component uses a hardware controller for...

ESP32 ac-dimmer dimmerlink esphome tutorial

Which AC Dimmer Module to Choose: Complete Buyer's Guide

Feb 26, 2026

0 147

FAQ

TL;DR: Three questions determine your choice: (1) load type — resistive (heater, incandescent) or inductive (motor); (2) load power in watts → calculate amps → pick a rating with a ×1.3 safety margin;...

Arduino ESP32 TRIAC ac-dimmer buyer-guide dimmerlink tutorial

ESP32-S2/C3/H2: AC Dimmer Doesn't Work on Single-Core ESP32

Feb 26, 2026

0 152

FAQ

TL;DR: rbdimmerESP32 is designed for dual-core ESP32 (original and S3). ESP32-S2, C3, C6, and H2 are single-core. The library tries to isolate the dimmer task on a dedicated core — which is impossible...

ESP32 ac-dimmer dimmerlink troubleshooting

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ac-dimmer Arduino berry buyer-guide dimmerlink ESP32 ESP8266 esphome flicker halogen home-automation I2C incandescent IRAM_ATTR leading-edge LED linux MOSFET MQTT multi-channel python raspberry-pi RBDdimmer safety smart-home tasmota theory trailing-edge TRIAC troubleshooting tutorial WiFi zero-cross