batterycharger.yaml

#  This is built to work with a harbor freight battery charger like the CenTech 2/10 battery charger.
#  The relay used is this one https://link.ventshop.net/chargerrelay
#
#
#
#

substitutions:
  disp_name: Battery Charger  # Change the disp_name to something you want
  devicename: batterycharger  #The device's name, MUST BE LOWERCASE!!!!

esphome:
  name: $devicename
  platform: ESP8266
  board: nodemcuv2

wifi:
  ssid: "WiFiSSID"
  password: "SuperSecretPassword"

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "${disp_name} Hotspot"
    password: "AnotherSecretPassword"

captive_portal:


logger:  # Enable logging


api:  # Enable Home Assistant API

ota:
  # password: "YetAnotherPassword"

web_server:  #Display information available on a web page to troubleshoot directly or access via web page.  The Sensor information will be displayed in a table along with a debug log.
  port: 80

switch:
  - platform: gpio  #in this situation I am using a Double throw relay, in the NC position it will connect to the higher amperage windings.  In the NO position when the relay is activated you will get the lower amperage windings.
    name: "${disp_name}"
    pin: D1
    id: relay
    inverted: yes

sensor:
  - platform: wifi_signal
    name: ${disp_name} WiFi Signal
    filters:
    - sliding_window_moving_average:
        window_size: 15
        send_every: 15
  - platform: adc  # This is using a voltage divider on the onboard ADC pin.
    pin: A0
    name: "${disp_name}"
    update_interval: 60s
    filters:
    - multiply: 16.27  #adjust this till you get the correct voltage.
    - sliding_window_moving_average:
        window_size: 10
        send_every: 1
    on_value_range:  #voltage values can be adjusted here.
      - above: 13.75
        then:
          - switch.turn_on: "relay"
      - below: 13.74
        then:
          - switch.turn_off: "relay"