ESPHome - Temperature controlled PWM

esp-pwm-temp-controller.yaml

esphome:
  name: esp-pwm-temp-controller
  friendly_name: ESP-PWM-Temp-Controller

esp32:
  board: esp32dev
  framework:
    type: arduino

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "WaHn1a6+xOHHPtZkiT7YsKoU1hX2RjwrmnVFxtMxZ8s="

ota:
  - platform: esphome
    password: "ace7afe1fba2586baf96a757cbe0aef2"

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  manual_ip:
   static_ip: 192.168.0.181 # Replace with an IP in your network's range
   gateway: 192.168.0.1 # Replace with your router's IP address
   subnet: 255.255.255.0 # Typically this is the subnet for home networks

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Esp-Pwm-Temp-Controller"
    password: "XJnQbyxoyxxJ"

captive_portal:

web_server:
  port: 80

# OneWire Bus Setup for DS18B20
one_wire:
  - platform: gpio
    pin: GPIO13 # The GPIO pin connected to the DS18B20 data pin

sensor:
  - platform: dallas_temp
    address: 0x3c00000086949528 # Replace with your DS18B20 address or use 0x0000000000000000 initially
    name: "Room Temperature"
    id: room_temp

  - platform: pulse_counter
    pin: GPIO12  # The GPIO pin connected to the tachometer pin of the fan
    id: fan_rpm
    unit_of_measurement: "RPM"
    name: "Fan RPM"
    update_interval: 5s
    accuracy_decimals: 0
    filters:
      - multiply: 0.5  # PC fan tachometers usually output two pulses per revolution

# PWM Output to Control the Fan Speed
output:
  - platform: ledc
    pin: GPIO14  # Connect this GPIO to the PWM pin of the fan
    id: pwm_fan
    frequency: 25000 Hz  # 25kHz is typical for PC fans, but check your fan's datasheet

# Fan Control Component
fan:
  - platform: speed
    output: pwm_fan
    name: "PC Fan Speed"
    id: pc_fan
    on_turn_on:
      then:
        - output.set_level:
            id: pwm_fan
            level: 50%  # Set to 50% speed when the fan turns on initially

# Temperature-Based Fan Control
interval:
  - interval: 10s
    then:
      - lambda: |-
          float temp = id(room_temp).state;
          ESP_LOGD("custom", "Current Temperature: %.2f°C", temp);

          if (!id(pc_fan).state) {
            id(pc_fan).turn_on();
            ESP_LOGD("custom", "Fan was OFF, turning ON now.");
          }

          if (temp > 45) {
            id(pc_fan).speed = 1.0; // 100% speed
            ESP_LOGD("custom", "Fan Speed set to 100%%");
          } else if (temp > 35) {
            id(pc_fan).speed = 0.75; // 75% speed
            ESP_LOGD("custom", "Fan Speed set to 75%%");
          } else {
            id(pc_fan).speed = 0.5; // 50% speed
            ESP_LOGD("custom", "Fan Speed set to 50%%");
          }

          ESP_LOGD("custom", "Current Fan Speed: %.0f%%", id(pc_fan).speed * 100);
          ESP_LOGD("custom", "Current Fan RPM: %.0f", id(fan_rpm).state);