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 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
| Description | Function | Pin# | Pin# | Function | Description | 1 | 2 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | ||||||||||||
| 5 | 6 | ||||||||||||
| get data from DS18B20 | 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
| 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 |