This switch contains two RTL8367S chips connected via the RGMII interface.
The switch uses an unknown microcontroller. I couldn't find a pin-to-pin compatible replacement that would allow flashing custom firmware. As a result, I added an external controller. The RTL8367S chips are configured to remain idle and wait for configuration via the SMI bus. To avoid conflicts, the original controller must be unsoldered.
Tested on Blue Pill board I have a strange Chinese clone without CAN support and with 128KB of RAM. The debug build doesn't fit into 64KB of flash, but the release build should fit on the original Blue Pill with 64KB of flash.
PB8 -> SCL (RTL8367S near port 1-5) PB9 -> SDA (RTL8367S near port 1-5) PB6 -> SCL (RTL8367S near port 5-10) PB7 -> SDA (RTL8367S near port 5-10)
L2 vlans works. Config hardcoded as json.
port 1 - port for IP phone (VLAN240 for ip phone, VLAN 11 for PC connected to IP phone) port 9 and 10 uplink ports ports 2-8 - ports with some vlan
Switch with custom controller
Add upload json config via serial.
The TMI7608S PoE chip supports control via I²C, but by default it starts in Auto mode and supplies power to connected powered devices (PDs) automatically.
The switch can theoretically be converted to a network-managed device via Wi-Fi using an ESP32, or via Ethernet using an ESP32 or STM32F107 by repurposing one of the existing Ethernet ports.
API source Realtek-Unmanaged-Switch-Arduino-Library