Mini Router

This is a mini router built using a router module (Ebitech E103-W20, compatible with Hylink HLK7628N) with an MT7628 processor.
It is designed for minimal size, using a TPS54302DDCR for 3.3V power supply, 0603 packaged resistors and capacitors, and features one Ethernet port (LAN/WAN function switched via a switch), one 1.0mm x 4-pin LAN port, a USB 2.0 port, a TF card slot, a TTL serial port, and an IPEX 1st generation
chip solution: MT7628AN, operating frequency: 2.4GHz, transmit power: 20-24dBm, MCU clock speed: 580MHz, communication distance: 200m, Wi-Fi protocol: IEEE 802.11b/g/n.
Module Introduction: This module exposes all interfaces of the MT7628AN, supports the OpenWrt operating system and custom development, has rich interfaces and a powerful processor, and can be widely used in smart devices or cloud service applications, allowing for free secondary development.
E-Bite Module Datasheet: E103-W20
[Taobao] https://m.tb.cn/h.5izwevn?tk=tn0fWX9vgc1 CZ0001 "E-Bite Serial to WiFi Surface Mount Low-Power Wireless Router Module Supports AP/STA" Click the link to open directly or search on Taobao.
Hailing Technology Module Datasheet: HLK7628N
Breed Firmware: breed-mt7688-reset38.bin
OpenWRT Firmware: Password: 58pp
Using the lede branch, backend IP: 192.168.8.1, password: 5845201314, compilation parameters are as follows:
Known Issue: Due to the shared IO of the TF card and some network ports, the network port may become unusable after flashing the TF firmware. This technical issue is currently unresolved. Because this chip is too old, its performance is poor; it can only be used with limited capabilities. Below are some test images.