MediaTek MT7628 router

 
This solution uses the MediaTek MT7628 chip as the processor, and the PoE chip selected is the Nanjing Guobo WS3203
open source protocol: CC-BY-NC-SA3.0.
Configuration:
MT7628 main controller,
DDR2-128M memory
, 32MB FLASH storage,
WAN supports PoE power reception,
PoE protocol: IEEE 802.3af,
the main controller uses the E103-W20 module (MT7628 main controller)
, and the PoE isolated power controller is the Nanjing Guobo WS3203.
Note: The initial design considered adding a USB-C port for power supply, using 48V for fast charging (PD3.1 protocol), but in actual testing, the regular USB-C port cannot use 48V, and hot-swapping will cause arcing and burn the interface. I've seen 48V solutions on the market, but they might be using custom USB-C
connectors that arced during cable disconnection
, causing issues with the PoE power supply handshake process (which is similar to the PD protocol).
The E103-W20 module comes pre-installed with OpenWRT 14.07 firmware. For secondary development tutorials, please refer to the E103-W20 module datasheet. (
Mobile phone recognition of the E103-W20 module's Wi-Fi
PoE switching power supply circuit.)