PoE HAT

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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

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

Software support

For Raspberry Pi 3B+/4B

Install our software to control the fan by following command

 curl -sL https://rock.sh/get-rockpi-poe | sudo -E bash -

Turn the fan on or off by systemctl

 sudo systemctl start rockpi-poe.service
 sudo systemctl stop rockpi-poe.service

Edit /etc/rockpi-poe.conf to set up temperature of the fan turn on or off, take it effect by below command

 sudo systemctl restart rockpi-poe.service

For Rockpi 4

Work In Process. Coming soon.

Model

Model	Description
F3	Design for Raspberry Pi 3B+/4
F3L	F3 with 40PIN GPIO pass-through exported
F4	Use with ROCK Pi 4
F4L	F4 with 40PIN GPIO pass-through exported

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

Download 2D file(.dwg) for ROCK Pi PoE HAT