Sonoff L1 ESPHome Component

led_strip_1.yaml

esphome:
  name: led_strip_1
  platform: ESP8266
  board: esp8285
  includes:
    - custom_components/sonoff_l1.h

wifi:
  

captive_portal:

# Logging must be disabled in order for the ESP to comunicate with the Nuvotron
# logger:
#   hardware_uart: UART0_SWAP
#   level: VERBOSE

# Enable Home Assistant API
api:

ota:

light:
- platform: custom
  lambda: |-
    auto light_out = new SonoffL1();
    App.register_component(light_out);
    return {light_out};

  lights:
    - name: "LED Strip 1"
      effects:
        - lambda:
            name: Colorful Gradient (Smooth)
            lambda: |-
              auto light_out = new SonoffL1();
              light_out->setModeGradient();
        - lambda:
            name: Colorful Breath (Fade)
            lambda: |-
              auto light_out = new SonoffL1();
              light_out->setModeBreath();
        - lambda:
            name: RGB Gradient
            lambda: |-
              auto light_out = new SonoffL1();
              light_out->setModeRGBGradient();
        - lambda:
            name: RGB Pulse (Strobe)
            lambda: |-
              auto light_out = new SonoffL1();
              light_out->setModeRGBPulse();
        - lambda:
            name: RGB Breath
            lambda: |-
              auto light_out = new SonoffL1();
              light_out->setModeRGBBreath();
        - lambda:
            name: RGB Strobe (Flash)
            lambda: |-
              auto light_out = new SonoffL1();
              light_out->setModeRGBStrobe();
        - lambda:
            name: Sound Reactive
            lambda: |-
              auto light_out = new SonoffL1();
              light_out->setModeSync();

sonoff_l1.h

#include "esphome.h"

class SonoffL1 : public Component, public LightOutput {

  #define SONOFF_L1_MODE_COLORFUL           1  // [Color key] Colorful (static color)
  #define SONOFF_L1_MODE_COLORFUL_GRADIENT  2  // [SMOOTH] Colorful Gradient
  #define SONOFF_L1_MODE_COLORFUL_BREATH    3  // [FADE] Colorful Breath
  #define SONOFF_L1_MODE_DIY_GRADIENT       4  // DIY Gradient (fade in and out) [Speed 1- 100, color]
  #define SONOFF_L1_MODE_DIY_PULSE          5  // DIY Pulse  (faster fade in and out) [Speed 1- 100, color]
  #define SONOFF_L1_MODE_DIY_BREATH         6  // DIY Breath (toggle on/off) [Speed 1- 100, color]
  #define SONOFF_L1_MODE_DIY_STROBE         7  // DIY Strobe (faster toggle on/off) [Speed 1- 100, color]
  #define SONOFF_L1_MODE_RGB_GRADIENT       8  // RGB Gradient
  #define SONOFF_L1_MODE_RGB_PULSE          9  // [STROBE] RGB Pulse
  #define SONOFF_L1_MODE_RGB_BREATH        10  // RGB Breath
  #define SONOFF_L1_MODE_RGB_STROBE        11  // [FLASH] RGB strobe
  #define SONOFF_L1_MODE_SYNC_TO_MUSIC     12  // Sync to music [Speed 1- 100, sensitivity 1 - 10]

 public:

  int mode = SONOFF_L1_MODE_COLORFUL;

  void setup() override {
    // nothing to do here
    Serial.begin(19200);
  }
  LightTraits get_traits() override {
    // return the traits this light supports
    auto traits = LightTraits();
    
    // Use Supported Color Modes for 2021.8 and later
    traits.set_supported_color_modes({light::ColorMode::RGB});
    
    // Use Individual traits for earlier versions
    // traits.set_supports_brightness(true);
    // traits.set_supports_rgb(true);
    // traits.set_supports_rgb_white_value(false);
    // traits.set_supports_color_temperature(false);
    return traits;
  }

  void write_state(LightState *state) override {
    // This will be called by the light to get a new state to be written.
    float red, green, blue;
    // use any of the provided current_values methods
    state->current_values_as_rgb(&red, &green, &blue);


    // Convert to 0-255
    int redValue, greenValue, blueValue;
    redValue = floor(red * 255);
    greenValue = floor(green * 255);
    blueValue = floor(blue * 255);

    bool ledState;
    state->current_values_as_binary(&ledState);

    float brightnessPercent;
    state->current_values_as_brightness(&brightnessPercent);

    // Convert to 0-100
    int brightness = floor(brightnessPercent * 100);

    char buffer[140];
    snprintf_P(buffer, sizeof(buffer), PSTR("AT+UPDATE=\"sequence\":\"%d%03d\",\"switch\":\"%s\",\"light_type\":1,\"colorR\":%d,\"colorG\":%d,\"colorB\":%d,\"bright\":%d,\"mode\":%d"),
    millis(), millis()%1000,
    ledState ? "on" : "off",
    redValue, greenValue, blueValue,
    brightness,
    SONOFF_L1_MODE_COLORFUL);

    Serial.print(buffer);
    Serial.write(0x1B);
    Serial.flush();

  }

  // SONOFF_L1_MODE_COLORFUL_GRADIENT
  void setModeGradient() {
    char buffer[140];
    snprintf_P(buffer, sizeof(buffer), PSTR("AT+UPDATE=\"sequence\":\"%d%03d\",\"mode\":%d"),
    millis(), millis()%1000,
    SONOFF_L1_MODE_COLORFUL_GRADIENT
    );

    Serial.print(buffer);
    Serial.write(0x1B);
    Serial.flush();
  }

  // SONOFF_L1_MODE_COLORFUL_BREATH
  void setModeBreath() {
    char buffer[140];
    snprintf_P(buffer, sizeof(buffer), PSTR("AT+UPDATE=\"sequence\":\"%d%03d\",\"mode\":%d"),
    millis(), millis()%1000,
    SONOFF_L1_MODE_COLORFUL_BREATH
    );

    Serial.print(buffer);
    Serial.write(0x1B);
    Serial.flush();
  }

  // SONOFF_L1_MODE_RGB_GRADIENT
  void setModeRGBGradient() {
    char buffer[140];
    snprintf_P(buffer, sizeof(buffer), PSTR("AT+UPDATE=\"sequence\":\"%d%03d\",\"mode\":%d"),
    millis(), millis()%1000,
    SONOFF_L1_MODE_RGB_GRADIENT
    );

    Serial.print(buffer);
    Serial.write(0x1B);
    Serial.flush();
  }

  // SONOFF_L1_MODE_RGB_PULSE
  void setModeRGBPulse() {
    char buffer[140];
    snprintf_P(buffer, sizeof(buffer), PSTR("AT+UPDATE=\"sequence\":\"%d%03d\",\"mode\":%d"),
    millis(), millis()%1000,
    SONOFF_L1_MODE_RGB_PULSE
    );

    Serial.print(buffer);
    Serial.write(0x1B);
    Serial.flush();
  }

  // SONOFF_L1_MODE_RGB_BREATH
  void setModeRGBBreath() {
    char buffer[140];
    snprintf_P(buffer, sizeof(buffer), PSTR("AT+UPDATE=\"sequence\":\"%d%03d\",\"mode\":%d"),
    millis(), millis()%1000,
    SONOFF_L1_MODE_RGB_BREATH
    );

    Serial.print(buffer);
    Serial.write(0x1B);
    Serial.flush();
  }

  // SONOFF_L1_MODE_RGB_STROBE
  void setModeRGBStrobe() {
    char buffer[140];
    snprintf_P(buffer, sizeof(buffer), PSTR("AT+UPDATE=\"sequence\":\"%d%03d\",\"mode\":%d"),
    millis(), millis()%1000,
    SONOFF_L1_MODE_RGB_STROBE
    );

    Serial.print(buffer);
    Serial.write(0x1B);
    Serial.flush();
  }

  // SONOFF_L1_MODE_SYNC_TO_MUSIC
  void setModeSync(int sensitive = 10, int speed = 50) {
    char buffer[140];
    snprintf_P(buffer, sizeof(buffer), PSTR("AT+UPDATE=\"sequence\":\"%d%03d\",\"mode\":%d,\"sensitive\":%d,\"speed\":%d"),
    millis(), millis()%1000,
    SONOFF_L1_MODE_SYNC_TO_MUSIC,
    sensitive,
    speed
    );

    Serial.print(buffer);
    Serial.write(0x1B);
    Serial.flush();
  }


};

I found the issue, I had logger enabled for wifi logging, which up to now did not seem to be an issue, but maybe in the latest version logger tries to set the baud rate or something. I fixed it by setting baud_rate: 0 which disables serial logging.

logger:
  esp8266_store_log_strings_in_flash: false
  baud_rate: 0

With this change the controller actually became more responsive than before. Maybe with logger enabled the Nuvotron was being slowed down by debug messages sent to it?

Note also that the " took a long time for an operation" warning still appears, probably it takes too long to send the command over serial, but likely it's not an issue. In esphome/issues#4717 it is mentioned that components should use callbacks to avoid the warning.