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MycilaDimmer

License: MIT Continuous Integration PlatformIO Registry

A comprehensive ESP32/Arduino dimming library for controlling AC power devices including TRIACs, SSRs, and voltage regulators through multiple dimming methods.

Overview

MycilaDimmer provides a unified interface for controlling AC power devices through different hardware implementations. The library uses a polymorphic architecture that allows you to switch between different dimming methods without changing your application code.

Key Benefits:

  • Unified API — Same interface for all dimmer types
  • IRAM Safe — Interrupt handlers work during flash operations
  • Hardware Agnostic — Supports multiple hardware approaches
  • Production Ready — Used in YaSolR Solar Router

Features

  • ✨ Flicker-Free Dimming: Progressive dimming without flickering using precise DAC control or zero-cross detection with quality ZCD circuits
  • 🎛️ Multiple Control Methods: Zero-cross detection, PWM, and I2C DAC
  • ⚡ High Performance: IRAM-safe interrupt handlers with lookup table optimization
  • 💡 Selectable Dimming Curves: Choose between linear dimming or Power LUT for perceptual brightness matching — switch at runtime
  • 🔧 Flexible Configuration: Duty cycle remapping, calibration, and user-selectable dimming modes
  • 📊 Rich Telemetry: Duty cycle measurements, firing ratios, and online status
  • 🛡️ Safety Features: Duty cycle limits and grid connection detection
  • 📱 JSON Integration: Optional ArduinoJson support for telemetry
  • 🔄 Real-time Control: Microsecond-precision timing control

Supported Hardware

  • ESP32 (all variants: ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6, ESP32-H2) via Arduino Framework
  • TRIACs with zero-cross detection circuits
  • Random Solid State Relays (SSRs)
  • Voltage Regulators with 0-10V control (LSA, LCTC, etc.)
  • DFRobot DAC Modules (GP8211S, GP8413, GP8403)

Quick Start

#include <MycilaDimmers.h>

Mycila::PWMDimmer dimmer;

void setup() {
  Serial.begin(115200);
  dimmer.setPin(GPIO_NUM_26);
  dimmer.begin();
  dimmer.setDutyCycle(0.5); // 50% power
}

void loop() {
  for (float power = 0.0; power <= 1.0; power += 0.1) {
    dimmer.setDutyCycle(power);
    delay(1000);
  }
}

License

This project is licensed under the MIT License - see the LICENSE file for details.

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Author: Mathieu Carbou
Used in: YaSolR Solar Router