My PoE Attic switch is FAILing, ESPHome PWM fans to the rescue? DIY

This is my last ditch effort to cool down my attic PoE switch that runs my cameras.. of course I had to hook it all up to Home Assistant to monitor the temps and control the PWM fans!

The code for the ESP32:
text_sensor:

# Send IP Address
- platform: wifi_info
ip_address:
name: Fanhub IP Address

# Send Uptime in raw seconds
- platform: template
name: Fanhub Uptime
id: uptime_human
icon: mdi:clock-start

sensor:
- platform: wifi_signal
name: Fanhub WiFi Strength
update_interval: 30s

- platform: dht
pin: GPIO15
temperature:
name: "Temperature"
humidity:
name: "Humidity"
update_interval: 10s

- platform: pulse_counter
pin: GPIO13
name: Fanhub Fan Speed1
id: fan_pulse1
unit_of_measurement: 'RPM'
filters:
- multiply: 0.5
count_mode:
rising_edge: INCREMENT
falling_edge: DISABLE
update_interval: 3s

- platform: uptime
name: Fanhub Uptime
id: uptime_sensor
update_interval: 60s
on_raw_value:
then:
- text_sensor.template.publish:
id: uptime_human
# Custom C++ code to generate the result
state: !lambda |-
int seconds = round(id(uptime_sensor).raw_state);
int days = seconds / (24 * 3600);
seconds = seconds % (24 * 3600);
int hours = seconds / 3600;
seconds = seconds % 3600;
int minutes = seconds / 60;
seconds = seconds % 60;
return (
(days ? to_string(days) + "d " : "") +
(hours ? to_string(hours) + "h " : "") +
(minutes ? to_string(minutes) + "m " : "") +
(to_string(seconds) + "s")
).c_str();
output:
- platform: ledc
pin: GPIO27
frequency: 10000 Hz
id: fanhub_pwm1

fan:
- platform: speed
output: fanhub_pwm1
name: "Fanhub Fan1"
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