Use APKPure App
Get CH55x Programmer old version APK for Android
Diese App ist für die CH55x-Serie von WCH, Programmierung über USB
Please use this new version of the Programmer: https://play.google.com/store/apps/details?id=com.atcnetz.de.ch55xprogrammerV2
This App is for the CH55x Series from WCH,
You can directly flash over your Smartphone via the USB port.
Currently supported micros:
CH551
CH552
CH553
CH554
Many thanks to: https://github.com/rgwan/librech551