v1.3.0
What's Changed
Programming CH552 using this binary you have to start mcu with bootloader mode. To start bootloader mode you have to pull-up D+ pin with 10K or greater Resistor to 3.3V rail while plugging it into USB. You can use WCHISPTool or other CH55x programmer.
Full Changelog: 1.2.0...1.3.0