....................

components/custom_monochromatic/light.py

@@ -1,14 +1,16 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
-from esphome.components import light, output
+from esphome.components import light, output, i2c
 from esphome.const import CONF_OUTPUT_ID, CONF_OUTPUT
 
+CONF_I2C_ADDR = 0x09
+
 UPPER_OUTPUT = "upper"
 LOWER_OUTPUT = "lower"
 
 c_monochromatic_ns = cg.esphome_ns.namespace("c_monochromatic")
 MonochromaticLightOutput = c_monochromatic_ns.class_(
-    "MonochromaticLightOutput", light.LightOutput
+    "MonochromaticLightOutput", light.LightOutput, cg.Component
 )
 
 CONFIG_SCHEMA = light.BRIGHTNESS_ONLY_LIGHT_SCHEMA.extend(
@@ -16,8 +18,9 @@ CONFIG_SCHEMA = light.BRIGHTNESS_ONLY_LIGHT_SCHEMA.extend(
         cv.GenerateID(CONF_OUTPUT_ID): cv.declare_id(MonochromaticLightOutput),
         cv.Required(UPPER_OUTPUT): cv.use_id(output.FloatOutput),
         cv.Required(LOWER_OUTPUT): cv.use_id(output.FloatOutput),
+
     }
-)
+).extend(i2c.i2c_device_schema(CONF_I2C_ADDR)).extend(cv.COMPONENT_SCHEMA)
 
 
 async def to_code(config):
@@ -27,3 +30,6 @@ async def to_code(config):
     upper = await cg.get_variable(config[UPPER_OUTPUT])
     lower = await cg.get_variable(config[LOWER_OUTPUT])
     cg.add(var.set_output(upper, lower))
+
+    await cg.register_component(var, config)
+    await i2c.register_i2c_device(var, config)

components/custom_monochromatic/monochromatic_light_output.h

@@ -1,15 +1,21 @@
 #pragma once
 
-#include "esphome/core/component.h"
-#include "esphome/components/output/float_output.h"
+#include "esphome/components/i2c/i2c.h"
 #include "esphome/components/light/light_output.h"
+#include "esphome/components/output/float_output.h"
+#include "esphome/core/component.h"
 
 namespace esphome {
 namespace c_monochromatic {
 
-class MonochromaticLightOutput : public light::LightOutput {
- public:
-  void set_output(output::FloatOutput *upper, output::FloatOutput *lower) { upper_ = upper; lower_ = lower; }
+class MonochromaticLightOutput : public light::LightOutput,
+                                 public i2c::I2CDevice,
+                                 public Component {
+public:
+  void set_output(output::FloatOutput *upper, output::FloatOutput *lower) {
+    upper_ = upper;
+    lower_ = lower;
+  }
   light::LightTraits get_traits() override {
     auto traits = light::LightTraits();
     traits.set_supported_color_modes({light::ColorMode::BRIGHTNESS});
@@ -22,10 +28,10 @@ class MonochromaticLightOutput : public light::LightOutput {
     this->lower_->set_level(bright);
   }
 
- protected:
+protected:
   output::FloatOutput *upper_;
   output::FloatOutput *lower_;
 };
 
-}  // namespace monochromatic
-}  // namespace esphome
+} // namespace c_monochromatic
+} // namespace esphome