Raspberry Pi PoE+ HAT
For Raspberry Pi 4 and Pi 3+
| Standard: | IEEE 802.3at-2003 PoE |
| Input voltage: | 37–57 V DC |
| Output voltage: | 5 V DC |
| Output current: | 4 A |
| Max Power: | 25.5 W |
| Cooling: | 25 x 25 mm brushless fan delivering 2.2 CFM for processor cooling |
| Operating temperature: | 0 °C to +50 °C |
| Site: | Raspberry Pi PoE+ HAT |
HAT is designed for Raspberry Pi 3B+ and 4B versions which are equipped with 4-pin PoE connector.
It allows simultaneous communication with LAN and powering the minicomputer board via Ethernet (RJ45) connector.
PoE+ HAT does not require installation of additional drivers for proper operation, it is a plug-and-play product.
On the board there is a brushless fan designed to cool the processor of the minicomputer,
it starts automatically when high temperature is detected.
The input voltage of the module ranges from 37 V to 57 V.
The output voltage is equal to 5 V and the current capacity is 4 A.
A switch with PoE+ (802.3at) support is required for proper operation of the module.
PoE+ Fan Temperature Control
$ sudo nano /boot/firmware/config.txt
Add to [all]:
# fan settings
dtoverlay=rpi-poe-plus
dtparam=poe_fan_temp0=10000,poe_fan_temp0_hyst=1000
dtparam=poe_fan_temp1=55000,poe_fan_temp1_hyst=5000
dtparam=poe_fan_temp2=60000,poe_fan_temp2_hyst=5000
dtparam=poe_fan_temp3=65000,poe_fan_temp3_hyst=5000
Then save and reboot.
I checked by the CPU temperature:
$ vcgencmd measure_temp
and got this output:
temp=45.1'C
Ambient temperature is around 21 °C