Blog Posts | RBDIMMER

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DimmerLink Not Detected on I2C: UART Mode Default Issue

Feb 26, 2026

0 43

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 41

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 29

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 22

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 43

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 33

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 34

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

How to Fix ESP32 AC Dimmer Flickering. Guide

Feb 10, 2026

0 289

Tech Articles

If you are building an AC dimmer with a TRIAC, you have probably noticed flickering, unstable brightness, or random jumps in light intensity. Most DIY developers think the problem is caused by: low-qu...

ESP32 ac-dimmer dimmerlink tutorial

DimmerLink controller – a compact I2C/UART interface

Feb 8, 2026

0 218

News

We're excited to announce DimmerLink – a compact I2C/UART interface module that brings intelligent AC dimming to your projects without the headaches of timing-critical code. What is DimmerLink? Dimmer...

dimmerlink news

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