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
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
We provide a install script to help you get the PoE fan control tool that works both in Raspberry Pi 3B+/4B and ROCK Pi 4.
curl -sL https://rock.sh/get-rockpi-poe | sudo -E bash -
Just copy the command above and paste it into the terminal and press enter. If you want more control, check out section Fan Control at the bottom of the page.
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/F4L)
| 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 motor driver | ||
| 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/F3L)
| 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 motor driver 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
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 speed level, take it effect by below command
sudo systemctl restart rockpi-poe.service
Manual installation
If you have trouble installing software using our script, try manual installation.
1. Enable hardware resources
For speed control and temperature detection, we need to ensure that some hardware resources are available, such as PWM and ADC. Since ROCK Pi and Raspberry Pi use different resources, they will be explained below.
1.1 ROCK Pi
If you are using the official system, please edit /boot/hw_intfc.conf to change intfc:pwm0=off and intfc:pwm1=off into intfc:pwm0=on and intfc:pwm1=on. If you are using other system, please refer to the distribution documentation to open PWM0 and PWM1.
1.2 Raspberry Pi
If you are using Raspbian, you can open 1-Wire with raspi-config and the path is Interfacing Options -> 1-Wire. Raspbian turns on PWM1 by default. If you are using other system, please refer to the distribution documentation to open 1-Wire and PWM1.
2. Install GPIO control library
2.1 ROCKP Pi
If you are using the official system, please install libmraa-rockpi4 from testing repo of Radxa APT. If you are using other system, please download mraa and build.
2.2 ROCKP Pi
If you are using Raspbian, you can install python3-rpi.gpio via apt. If you are using other system, please download raspberry-gpio-python and build.
3. Download package and install
3.1 ROCK Pi
wget https://cos.setq.me/rockpi/deb/rockpi-poe-0.13.deb
If you are using a debian based system, you can install it through dpkg. If you are using other system, extract the file to the root directory.
3.2 Raspberry Pi
wget https://cos.setq.me/rockpi/deb/raspi-poe-0.13.deb
If you are using a debian based system, you can install it through dpkg. If you are using other system, extract the file to the root directory.
4. Enable service
sudo systemctl enable rockpi-poe.service
That's all the installation script (https://rock.sh/get-rockpi-poe) do.