Below is the error when I attempt to validate my yaml file in ESPhome, please help
‘’‘INFO Reading configuration /config/esphome/light-mcu-1.yaml…
Failed config
sensor.mqtt: [source /config/esphome/light-mcu-1.yaml:32]
Platform not found: ‘sensor.mqtt’.
platform: mqtt
name: Current LED
state_topic: LightMCU/locator’’’
Check line 32 for error. Basically it say that sensor.mqtt is not available
I agree with that part I’m trying to figure out how to resolve it. I have MQTT installed have I failed to fully set it up? If so what part did I fail? I completed the test in MQTT and the configuration reads as follows:
‘’’
INFO Reading configuration /config/esphome/light-mcu-1.yaml…
Failed config
sensor.mqtt: [source /config/esphome/light-mcu-1.yaml:32]
Platform not found: ‘sensor.mqtt’.
platform: mqtt
name: Current LED
state_topic: LightMCU/locator
I also have the following in the log:
1633063596: Socket error on client , disconnecting.
1633063716: New connection from XXX.XX.XX.X on port 1883.
(the X’s remove the actual IP)
How do you expect to get correct help if you don’t share your esphome sketch ? 
I’m a noob I thought the error would be a better place to start, the yaml file is below:
sensor:
the ‘’’- platform: mqtt’’’ is where the error starts, the rest of the code is fine
A .yaml with 4 lines won’t compile. You need to add a lot more.
As stated by @francisp if your sketch has only that it can’t work, you should first read in details ESPHome documentation and understand how it works 
I failed to attach all of the code
esphome:
name: backyard-light
platform: ESP8266
board: nodemcuv2
# Enable logging
logger:
# Enable Home Assistant API
api:
ota:
password: ""
wifi:
ssid: ""
password: ""
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "Backyard-Light Fallback Hotspot"
password: "I3W8U5yZc4P4"
captive_portal:
sensor:
- platform: mqtt
name: "Current LED"
state_topic: "LightMCU/locator"
light:
- platform: mqtt
name: "Holiday Lights"
command_topic: "LightMCU/power"
state_topic: "LightMCU/powerState"
brightness_command_topic: "LightMCU/brightness"
brightness_state_topic: "LightMCU/brightnessState"
brightness_scale: 255
white_value_command_topic: "LightMCU/modifier"
white_value_state_topic: "LightMCU/modifierState"
white_value_scale: 500
effect_command_topic: "LightMCU/effect"
effect_state_topic: "LightMCU/effectState"
effect_list:
- Color_Chase
- Color_Glitter
- Single_Race
- Double_Crash
- Rainbow
- Blocked_Colors
- BPM
- Twinkle
- Fire
- Fill_Solid
- Spooky_Eyes
- LED_Locator
retain: true
- platform: mqtt
name: "Color 1"
command_topic: "LightMCU/ColorPower"
state_topic: "LightMCU/powerState"
rgb_command_topic: "LightMCU/color1"
rgb_state_topic: "LightMCU/color1State"
retain: true
- platform: mqtt
name: "Color 2"
command_topic: "LightMCU/ColorPower"
state_topic: "LightMCU/powerState"
rgb_command_topic: "LightMCU/color2"
rgb_state_topic: "LightMCU/color2State"
retain: true
- platform: mqtt
name: "Color 3"
command_topic: "LightMCU/ColorPower"
state_topic: "LightMCU/powerState"
rgb_command_topic: "LightMCU/color3"
rgb_state_topic: "LightMCU/color3State"
retain: true
- platform: mqtt
name: "Glitter"
state_topic: "LightMCU/glitter/state"
command_topic: "LightMCU/addEffects"
payload_on: "Glitter On"
payload_off: "Glitter Off"
rgb_command_topic: "LightMCU/glitterColor"
rgb_state_topic: "LightMCU/glitterColorState"
white_value_command_topic: "LightMCU/glitterChance"
white_value_state_topic: "LightMCU/glitterChanceState"
white_value_scale: 255
retain: true
- platform: mqtt
name: "Lightning"
state_topic: "LightMCU/lightning/state"
command_topic: "LightMCU/addEffects"
payload_on: "Lightning On"
payload_off: "Lightning Off"
white_value_command_topic: "LightMCU/lightningChance"
white_value_state_topic: "LightMCU/lightningChanceState"
white_value_scale: 500
retain: true
##Example Group
group:
houseLights:
name: Holiday Lights
control: hidden
entities:
- light.holiday_lights
- light.color_1
- light.color_2
- light.color_3
- light.glitter
- light.lightning
- sensor.current_led
##Example Lovelace
cards:
- type: entities
title: Holiday Lights
show_header_toggle: false
entities:
- light.holiday_lights
- light.color_1
- light.color_2
- light.color_3
- light.glitter
- light.lightning
- sensor.current_led
Here is all of it
I failed to attach all of the code
esphome:
name: backyard-light
platform: ESP8266
board: nodemcuv2
# Enable logging
logger:
# Enable Home Assistant API
api:
ota:
password: ""
wifi:
ssid: ""
password: ""
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "Backyard-Light Fallback Hotspot"
password: "I3W8U5yZc4P4"
captive_portal:
sensor:
- platform: mqtt
name: "Current LED"
state_topic: "LightMCU/locator"
light:
- platform: mqtt
name: "Holiday Lights"
command_topic: "LightMCU/power"
state_topic: "LightMCU/powerState"
brightness_command_topic: "LightMCU/brightness"
brightness_state_topic: "LightMCU/brightnessState"
brightness_scale: 255
white_value_command_topic: "LightMCU/modifier"
white_value_state_topic: "LightMCU/modifierState"
white_value_scale: 500
effect_command_topic: "LightMCU/effect"
effect_state_topic: "LightMCU/effectState"
effect_list:
- Color_Chase
- Color_Glitter
- Single_Race
- Double_Crash
- Rainbow
- Blocked_Colors
- BPM
- Twinkle
- Fire
- Fill_Solid
- Spooky_Eyes
- LED_Locator
retain: true
- platform: mqtt
name: "Color 1"
command_topic: "LightMCU/ColorPower"
state_topic: "LightMCU/powerState"
rgb_command_topic: "LightMCU/color1"
rgb_state_topic: "LightMCU/color1State"
retain: true
- platform: mqtt
name: "Color 2"
command_topic: "LightMCU/ColorPower"
state_topic: "LightMCU/powerState"
rgb_command_topic: "LightMCU/color2"
rgb_state_topic: "LightMCU/color2State"
retain: true
- platform: mqtt
name: "Color 3"
command_topic: "LightMCU/ColorPower"
state_topic: "LightMCU/powerState"
rgb_command_topic: "LightMCU/color3"
rgb_state_topic: "LightMCU/color3State"
retain: true
- platform: mqtt
name: "Glitter"
state_topic: "LightMCU/glitter/state"
command_topic: "LightMCU/addEffects"
payload_on: "Glitter On"
payload_off: "Glitter Off"
rgb_command_topic: "LightMCU/glitterColor"
rgb_state_topic: "LightMCU/glitterColorState"
white_value_command_topic: "LightMCU/glitterChance"
white_value_state_topic: "LightMCU/glitterChanceState"
white_value_scale: 255
retain: true
- platform: mqtt
name: "Lightning"
state_topic: "LightMCU/lightning/state"
command_topic: "LightMCU/addEffects"
payload_on: "Lightning On"
payload_off: "Lightning Off"
white_value_command_topic: "LightMCU/lightningChance"
white_value_state_topic: "LightMCU/lightningChanceState"
white_value_scale: 500
retain: true
##Example Group
group:
houseLights:
name: Holiday Lights
control: hidden
entities:
- light.holiday_lights
- light.color_1
- light.color_2
- light.color_3
- light.glitter
- light.lightning
- sensor.current_led
##Example Lovelace
cards:
- type: entities
title: Holiday Lights
show_header_toggle: false
entities:
- light.holiday_lights
- light.color_1
- light.color_2
- light.color_3
- light.glitter
- light.lightning
- sensor.current_led
I removed the wifi info as I know that is correct and the OTA password
Instead of editing your code before sharing it here, put all credentials in secrets file
How do you expect to subscribe at MQTT topics without first declaring how to connect at MQTT Server ? I would strongly advise you to read ESPHome documentation about MQTT here MQTT Client Component — ESPHome to properly setup it and also perhaps read a little of documentation about MQTT to understand properly how it works (Documentation | Eclipse Mosquitto)
Excellent point, I just read up on that last night and I’m reconfiguring all of my code to operate that way
and feel free to share your sketch again if you still have some issues after having updated it