Wifi Fancontroller

What is it?

This board is an ESP32-S2-based Wifi Fancontroller.

It allows you to control up to 4 independent PWM Fans and read temperature & humidity at the installed location. E.g., you can use a standard 12V 120mm Noctua PC fan as an exhaust for a PC inside a cupboard.

Specs

• Electrical & IO
  • 12V DC Barrel Input (5.5x2.1mm, max. 2.5A)
  • 4x PWM Fan Output (only limited by 2.5A input limit)
• Sensors & Expansion
  • HDC1080 Temperature & Humidity Sensor
  • RGB Status LEDs (Board + Fans)
  • Qwiic Expansion Port
  • I2C Expansion Port (2.54mm Header)
  • Neopixel Port
  • 3 User Buttons
  • GPIO Expansion Pads (2.54mm SMD Header)

How did this come to be?

When I built my first server rack, I found no readily available solution for controlling PWM fans via HomeAssistant. That's when I decided to make this product.

I'm using it in my network racks for ventilation. Put 2x 120mm PWM fans on top for exhaust, add an internal fan for circulation, and you're good to go.

Software Stack

This PCB comes pre-flashed with an ESPHome Factory Image or can be reflashed via a USB or Wifi.

Find the sources for ESPHome here: https://github.com/zeroflow/esphome-fancontroller