u/tiberiusgv

I've had a few post here regarding converting some Lumary 6in Slim ceiling lights that originally came with WB2L Tuya chips, that I then chip swapped them with ESP-C05 chips to move them to ESPHome, and now want to move over to Zigbee. Without an identical pinout option on the market I'm using the ESP32-C6 chips wired in.

https://preview.redd.it/8t0bkap9259h1.png?width=1920&format=png&auto=webp&s=711a28ae5bd94cc9f7cf1fd67084f00c9843c16c

I want to share what I have that seems to be working really well now. I had some issue with RGB color mixing, but after adding the gamma curve adjustment the colors are much better. While I left it in the code commented out I didn't care for the gamma adjustment when it came to the white lights so I switched that back to a linear mix. I'd say that it's as good or maybe better than the color mix of ledc in ESPHome, at least for these specific lights.

Anyways, why I called this the prime day update is there is a deal going for the ESP32-C6 chips. Unfortunately they are limiting to one per customer, but thanks to some friends & family members, and being happy enough with my below Arduino code I pulled the trigger and plan to chip swap (Again) all 24 of my light and get them off of Wi-Fi.

I hope my code here (yeah I should probably put it on github) is helpful to others. I hadn't worked with Arduino code before this and I wasn't able to find any direct examples for RGBWW lights like what I was after.

// Check for the Coordinator/Router compiler flag instead of End Device
#ifndef ZIGBEE_MODE_ZCZR
#error "Zigbee Coordinator/Router mode is not selected in Tools->Zigbee mode"
#endif

#include "Zigbee.h"

// Define the GPIO pins for your MOSFETs/drivers ruling the LED strips
#define PIN_RED    19   // D8
#define PIN_GREEN  20   // D9
#define PIN_BLUE   17   // D7
#define PIN_WARM   23   // D5
#define PIN_COLD   16   // D6

#define ZIGBEE_ENDPOINT 10

// LEDC PWM Setup
#define PWM_FREQ        20000
#define PWM_RESOLUTION  10 // 10-bit resolution = maximum PWM value is 1023

// Global Light Variables
bool current_state = false;
uint8_t current_level = 255;
uint8_t color_r = 255, color_g = 255, color_b = 255;
uint16_t color_temp = 250; // Mireds
uint8_t color_mode = 0;    // 0 = RGB, 1 = Color Temperature
uint16_t min_mireds = 154;  // mireds ~ 1000000 / 6500
uint16_t max_mireds = 370;  // mireds ~ 1000000 / 2700

// Instantiate the endpoint
ZigbeeColorDimmableLight zbLight = ZigbeeColorDimmableLight(ZIGBEE_ENDPOINT);

// 10-bit Gamma Correction Lookup Table (Gamma = 2.2)
// Maps linear 8-bit inputs (0-255) to human-perceived 10-bit PWM outputs (0-1023)
const uint16_t gammaTable[256] PROGMEM = {
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,
  2, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 7, 8, 9, 10, 11,
  12, 13, 14, 15, 16, 18, 19, 20, 22, 23, 25, 27, 28, 30, 32, 34,
  36, 38, 40, 43, 45, 47, 50, 52, 55, 58, 60, 63, 66, 69, 72, 75,
  79, 82, 85, 89, 93, 96, 100, 104, 108, 112, 116, 121, 125, 129, 134, 139,
  143, 148, 153, 158, 163, 169, 174, 179, 185, 191, 196, 202, 208, 214, 220, 226,
  233, 239, 246, 253, 259, 266, 273, 280, 288, 295, 303, 310, 318, 326, 334, 342,
  350, 359, 367, 376, 385, 394, 403, 412, 421, 431, 440, 450, 460, 470, 480, 490,
  501, 512, 522, 533, 544, 555, 566, 578, 589, 601, 612, 624, 636, 648, 660, 673,
  685, 698, 711, 724, 737, 750, 763, 777, 790, 804, 818, 832, 846, 861, 875, 890,
  905, 920, 935, 950, 966, 981, 997, 1013, 1029, 1045, 1062, 1078, 1095, 1112, 1129, 1146,
  1163, 1180, 1198, 1216, 1234, 1252, 1270, 1288, 1307, 1325, 1344, 1363, 1382, 1401, 1421, 1440,
  1460, 1480, 1500, 1520, 1541, 1561, 1582, 1603, 1624, 1645, 1666, 1688, 1709, 1731, 1753, 1775,
  1797, 1819, 1842, 1864, 1887, 1910, 1933, 1956, 1979, 2003, 2026, 2050, 2074, 2098, 2122, 2146,
  2171, 2195, 2220, 2245, 2270, 2296, 2321, 2347, 2373, 2399, 2425, 2451, 2478, 2504, 2531, 2558,
  2585, 2612, 2640, 2667, 2695, 2723, 2751, 2779, 2807, 2836, 2865, 2894, 2923, 2952, 2981, 3011
};

void update_hardware_leds()
{
  if (!current_state)
  {
    ledcWrite(PIN_RED, 0);
    ledcWrite(PIN_GREEN, 0);
    ledcWrite(PIN_BLUE, 0);
    ledcWrite(PIN_COLD, 0);
    ledcWrite(PIN_WARM, 0);
    return;
  }

  float dim_factor = current_level / 255.0;

  if (color_mode == 0)
  { // RGB Mode
    // 1. Calculate uncorrected, scaled 8-bit color values
    uint8_t r_lin = (uint8_t)(color_r * dim_factor);
    uint8_t g_lin = (uint8_t)(color_g * dim_factor);
    uint8_t b_lin = (uint8_t)(color_b * dim_factor);

    // 2. Fetch gamma-corrected 10-bit properties (scaled down from 12-bit array map via >> 2)
    ledcWrite(PIN_RED,   pgm_read_word(&gammaTable[r_lin]) >> 2);
    ledcWrite(PIN_GREEN, pgm_read_word(&gammaTable[g_lin]) >> 2);
    ledcWrite(PIN_BLUE,  pgm_read_word(&gammaTable[b_lin]) >> 2);
    ledcWrite(PIN_COLD,  0);
    ledcWrite(PIN_WARM,  0);
  } 
  else 
  { // White Spectrum Mode
    // 1. Map color temperature variables linearly to standard 8-bit format
    uint8_t warm_lin = map(color_temp, min_mireds, max_mireds, 0, 255);
    uint8_t cold_lin = 255 - warm_lin;

    // 2. Incorporate master dimming levels into 8-bit tracking variables
    warm_lin = (uint8_t)(warm_lin * dim_factor);
    cold_lin = (uint8_t)(cold_lin * dim_factor);

    // 3. Process outputs using gamma-corrected curves, shifting values to 10-bit PWM range
    ledcWrite(PIN_RED,   0);
    ledcWrite(PIN_GREEN, 0);
    ledcWrite(PIN_BLUE,  0);
-
    //With Gamma Correction:
    //ledcWrite(PIN_COLD,  pgm_read_word(&gammaTable[cold_lin]) >> 2);
    //ledcWrite(PIN_WARM,  pgm_read_word(&gammaTable[warm_lin]) >> 2);


    //Without Gamme Correction:
    ledcWrite(PIN_COLD,  (uint16_t)(cold_lin * 4));
    ledcWrite(PIN_WARM,  (uint16_t)(warm_lin * 4));
  }
}

void setRGBLight(bool state, uint8_t r, uint8_t g, uint8_t b, uint8_t level)
{
  current_state = state;
  current_level = level;
  color_r = r;
  color_g = g;
  color_b = b;
  color_mode = 0; // Toggle to RGB Mode
  
  Serial.printf("RGB -> State:%d, Level:%d, R:%d G:%d B:%d\n", state, level, r, g, b);
  update_hardware_leds();
}

void setTempLight(bool state, uint8_t level, uint16_t mireds)
{
  current_state = state;
  current_level = level;
  color_temp = mireds;
  color_mode = 1; // Toggle to White Temp Mode
  
  Serial.printf("Temp -> State:%d, Level:%d, Mireds:%d\n", state, level, mireds);
  update_hardware_leds();
}

void setup()
{
  Serial.begin(115200);

  ledcAttach(PIN_RED,   PWM_FREQ, PWM_RESOLUTION);
  ledcAttach(PIN_GREEN, PWM_FREQ, PWM_RESOLUTION);
  ledcAttach(PIN_BLUE,  PWM_FREQ, PWM_RESOLUTION);
  ledcAttach(PIN_COLD,  PWM_FREQ, PWM_RESOLUTION);
  ledcAttach(PIN_WARM,  PWM_FREQ, PWM_RESOLUTION);

  // Enable XY (RGB) and Color Temperature capabilities
  zbLight.setLightColorCapabilities(ZIGBEE_COLOR_CAPABILITY_X_Y | ZIGBEE_COLOR_CAPABILITY_COLOR_TEMP);

  zbLight.setManufacturerAndModel("Lumary", "6in Slim Light");
  
  // Bind callbacks
  zbLight.onLightChangeRgb(setRGBLight);
  zbLight.onLightChangeTemp(setTempLight);

  zbLight.setLightColorTemperatureRange(min_mireds, max_mireds);

  Zigbee.addEndpoint(&zbLight);

  Serial.println("Starting Zigbee Subsystem...");
  if (!Zigbee.begin(ZIGBEE_ROUTER))
  {
    Serial.println("Failed to start! Rebooting...");
    delay(2000);
    ESP.restart();
  }
}

void loop()
{
  delay(100);
}

The picture referenced below.

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I just updated the UDM-SE router I have there, but I doubt that will change much. He's got the latest cable modem from Spectrum in anticipation of High-Split rolling out in the next few months. Power cycling the modem did not resolve the issue.

Any theories? His usage doesn't really match up with the packet loss. If anything he's been watching DVDs when the internet stops internetting properly. Kind of reminds me of that story of the dude in England who's old TV would knock out the broadband from when he turned it on in the morning until he turned if off when he went to bed.

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Personally, I would like electronic brakes as I have a truck with a tow package, but I'm aware that not everyone does. The logistics of moving the "RC Boat" around are difficult enough and we don't want to limit our options.

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