Fancontroller Rev 3.1

Description

• Main Controller
  • ESP32S2-Mini-2
• Onboard
  • DC Input (12V, 5.5x2.1mm)
  • USB-C port for flashing
  • 4x FAN PWM Header
    • Buffering for improved signal integrity and resilience
  • Status LEDs (SK6805) for board & each fan connector
  • HDC1080 Temperature & Humidity sensor
• IO
  • Reset / Boot Buttons
  • 3x User Buttons
  • QWIIC Expansion port
  • I2C Expansion Port (100mil, SCL, SDA & Int)
  • Neopixel Port (5V, max. 2A total)

Example Config File

Base Config - 4 fans

Board

ESP32S2 Pin Assignment

Pin	Usage
GPIO0	Boot Button, Push to enter flashing mode
GPIO1	Builtin LEDs, SK6805
GPIO2	Expansion Header (Bottom)
GPIO3	Expansion Header (Bottom)
GPIO4	Expansion Header (Bottom)
GPIO5	Expansion Header (Bottom)
GPIO6	Expansion Header (Bottom)
GPIO7	Expansion Header (Bottom)
GPIO8	Expansion Header (Bottom)
GPIO9	Expansion Header (Bottom)
GPIO10	Expansion Header (Bottom)
GPIO11	Expansion Header (Bottom)
GPIO12	Fan 1 PWM
GPIO13	Fan 2 PWM
GPIO14	Fan 3 PWM
GPIO15	Fan 4 PWM
GPIO16	Fan 1 Speed Sense
GPIO17	Fan 2 Speed Sense
GPIO18	Fan 3 Speed Sense
GPIO21	Fan 4 Speed Sense
GPIO26	unused
GPIO33	I2C SDA
GPIO34	I2C SCL
GPIO35	I2C INT
GPIO36	USR3
GPIO37	USR2
GPIO38	USR2
GPIO42	Neopixel Expansion Port
GPIO45	unused (strappping)
GPIO46	unused (strapping)

I2C extension port

The board offers an I2C extension port above Fan 4.

Nr.	Pin -	Description
1	GND
2	INT	GPIO 35
3	SCL	GPIO 34, 4.7k Pull-Up
4	SDA	GPIO 33, 4.7k Pull-Up
5	+3V3

SMD expansion port

The board offers and SMD expansion port on the back.

Nr.	Pin -	Description
1	+3V3
2	+5V
3	I/O	GPIO02
4	I/O	GPIO03
5	I/O	GPIO04
6	I/O	GPIO05
7	I/O	GPIO06
8	I/O	GPIO07
9	I/O	GPIO08
10	I/O	GPIO09
11	I/O	GPIO10
12	I/O	GPIO11
13	GND
14	GND