esp8266-pv-battery-indicator.yaml

esphome:
  name: esp8266-pv-battery-indicator
  friendly_name: esp8266-pv-battery-indicator

esp8266:
  board: nodemcuv2

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: ""

ota:
  password: ""

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

sensor:
  - platform: homeassistant
    name: "Battery SOC"
    id: soc
    entity_id: sensor.sun10k_battery_capacity # <<< ensure you configure your correct entity which returns the batter soc value
    accuracy_decimals: 0

# Calculate green color value.
  - platform: template
    id: soc_green
    update_interval: 1s
    accuracy_decimals: 0
    lambda: 
      return id(soc).state;
    filters:
      - calibrate_linear:
        - 0 -> 255
        - 100 -> 0
# Calculate red color value. The lower, the more red.
  - platform: template
    id: soc_red
    update_interval: 1s
    accuracy_decimals: 0
    lambda: 
      return id(soc).state;
    filters:
      - calibrate_linear:
        - 0 -> 0
        - 100 -> 255
# Calculate how many LEDs should illuminate
  - platform: template
    id: soc_lights
    update_interval: 1s
    accuracy_decimals: 0
    lambda: 
      return id(soc).state;
    filters:
      - calibrate_linear:
        - 0 -> 0
        - 100 -> 20 # <<< Type in here the num of addressable leds. (In my example I've used 20)

light:
  - platform: neopixelbus
    id: led_strip
    internal: false
    variant: WS2811
    pin: D5
    num_leds: 20 # <<< Type in here the num of addressable leds. (In my example I've used 20)
    type: GRB
    color_correct: [90%, 90%, 90%]
    name: "PV Battery indicator"
    on_turn_on:
      light.turn_on:
            id: led_strip
            effect: "PV Battery indicator"
            brightness: 100%
    effects:
      - addressable_lambda:
          name: "PV Battery indicator"
          update_interval: 1s
          lambda: |-
            for (int i = 0; i < it.size(); i++) {
              if (id(soc_lights).state > i) {
                it[i] = ESPColor(id(soc_green).state, id(soc_red).state, 0);
              } else {
                it[i] = ESPColor(0, 0, 0);
              }
            }