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PoE HAT


    Home >  ROCK Pi PoE HAT

Introduction


ROCK Pi PoE HAT is a HAT accessories designed for Raspberry Pi and ROCK Pi 4. The PoE HAT allows you to power your Raspberry Pi or ROCK Pi 4 using Power over Ethernet–enabled networks; for this product to be used, the network it is connected to needs to have power-sourcing equipment installed.

It comes with the following features:

  • 802.3at up to 21W(5V/4.2A)
  • PWM control FAN up to 12000RPM
  • Temperature sensor DS18B20
  • Optional 40PIN GPIO pass-through exported
  • Compatible with ROCK Pi 4, Raspberry Pi 3B+ and Raspberry Pi 4
  • Clean design by hiding the fan and the big transformer inside
  • EEPROM for HAT identity and driver probe

Rockpi with poe hat.png

Supplied with this product

  • ROCK Pi PoE HAT
  • Mechanical spacers

Other hardware needed

  • A Raspberry Pi 4 Model B or Raspberry Pi 3 Model B+ or ROCK Pi 4
  • An Ethernet cable
  • Power-sourcing equipment for a 802.3af or 802.3at Power over Ethernet network

Model

Model Description
F3 Design for Raspberry Pi 3B+/4
F4 Use with ROCK Pi 4

The difference between F3 and F4 is, F3 and F4 uses different GPIO for fan control. F4 use ADC for temperature detection, while F3 uses DS18B20.

PINOUT

PoE HAT for ROCK Pi 4(Model F4)

Description Function Pin# Pin# Function Description
1 2
3 4
5 6
GPIO2_B3 7 8
9 10
11 12
control fan speed PWM1 13 14
GPIO4_C5 15 16 GPIO4_D2 enable/disable fan control chip
17 18
19 20
21 22
23 24
25 26 ADC_IN0 Get ADC value to get the temperature value
connect to EEPROM SDA pin I2C2_SDA 27 28 I2C2_SCL connect to EEPROM SCL pin
29 30
31 32
33 34
35 36
37 38
39 40

PoE HAT for Raspberry Pi 3B+/4 (Model F3)

Description Function Pin# Pin# Function Description
1 2
3 4
5 6
get data from DS18B20 BCM4 7 8
9 10
11 12
13 14
enable/disable fan control chip BCM22 15 16
17 18
19 20
21 22
23 24
25 26
connect to EEPROM SDA pin I2C0_SDA 27 28 I2C0_SCL connect to EEPROM SDA pin
29 30
31 32
control fan speed PWM1 33 34
35 36
37 38
39 40

Fan Control

Dimensions