SFP Buddy

$40

Sfp Media Buddy is a 2.5g media coverter using a rtl8221b (realtek) chip to convert between SFP+ modules and rj45 and supports 100mbit,1g, and 2.5g speeds(according to rtl8221b datasheet)

The Media Buddy is controlled by a rp2040 microcontroller which is connected to the media converter and all non-serdes pins of the sfp socket as well as to the usb-c port. As such it can control almost all functions of the sfp stick including

• i2c commands
• power cycling the sfp stick
• toggling and viewing the status of pins such as rx_los
• and most importantly using any of those pins as RX or TX for uart

Through the usb-c interface it exposes 2 serial ports, one which is connected to the uart functionality and the other is a management console allowing you to

• view status of pins
• power cycle the sfp module
• send commands to the media converter
• change which pins (if any) are connected to the uart console
• status of media converter

It also supports usb-pd for powering sticks with higher wattage than usb can normally handle.

The SFP Media Buddy is an all-in-one package for both using and debugging the SFP onts designed with input from the 8311 discord server to provide all functions required for debugging SFP+ modules.

Currently ships to US, Canada, and United Kingdom. If your country is not listed please contact me on discord