[SyncOnGreen]

Neat project - I was looking for something similar for powering various bits of electronics and stumbled upon WEB PDC001 (can be found on Aliexpress) cable which is basically programmable USB-C cable with DC barrel jack. Works great with TS-100 soldering iron powered using generic PD phone charger. The only issue with it - software for programming it is Windows only and it isn't translated to English.

[chx]

If you figured the sw out, care to publish a blog post about it?

[SyncOnGreen]

I tried reverse-engineering the USB protocol but quickly moved onto another project. Project is on GitHub https://github.com/JaCzekanski/pdc-control

Small correction: the software itself is in English but the documentation (and firmware files) is in Chinese.