An Arduino based DIY controller for controlling a hot tub system with temperature reporting, pump and heater control, and Home Assistant MQTT based integration
This particular implementation uses a Wemos D1 Mini clone with built in ESP8266 module for WiFi connectivity
mqtt:
sensor:
- name: "Spa Heater"
state_topic: "homeassistant/spa/state"
value_template: "{{ value_json.heater }}"
switch:
- name: "Spa Pump"
icon: "mdi:pump"
state_topic: "homeassistant/spa/state"
value_template: "{{ value_json.pump }}"
state_on: true
state_off: false
command_topic: "homeassistant/spa/set"
payload_on: '{"pump":true}'
payload_off: '{"pump":false}'
number:
- name: "Spa Temperature"
device_class: "temperature"
command_topic: "homeassistant/spa/set"
command_template: '{"temperature": {{value}} }'
min: 32
max: 105
state_topic: "homeassistant/spa/state"
value_template: "{{ value_json.temperature }}"
unit_of_measurement: "°F"