Flashing tool for optical modem stick (SFP serial port tool)

Based on [Panda's project](https://oshwhub.com/guocuodecuoguo/shuang-sfp-mao-bang-zhuan-jie-kuo-zhan_copy), I was playing around with it one night out of boredom and noticed that the Type-C port wasn't centered, triggering my OCD. I also took the opportunity to test my half-year-long work on a semi-automatic routing algorithm.

/*March 22, 2024 - Re-ran it using an updated automatic routing algorithm. Only the routing was changed; the component types, quantities, and positions were not adjusted. The previous version's interactive BOM still works.*/

Removed the header pins, replaced the serial port chip with a CH340X, and rearranged the PCB routing. All components were moved to one side for easy soldering with a heating plate. The SFP and Type-C ports were centered, and I even beveled a corner.

In short, here's a comparison with the original project:

![Comparison Image.jpg]
Component standardization is complete; the SFP interface and matching soldering cage can be purchased directly from Taobao.

Verified and successful; serial port content can be printed. The test stick is an Alcatel G-010S-P, shipped about two weeks ago, with a baud rate of 115200, as shown in the image.

![Test Result.png]
The attached file is an interactive BOM exported from AD.