This is the $2 USB dongle found on Amazon, eBay, and AliExpress. ASProgrammer 21013 was essentially reverse-engineered to fix the CH341A's flaws.
ASProgrammer 2.1.0.13 cannot fix the 5V logic level of the CH341A. If you are frying 3.3V MXIC chips, search for "CH341A 3.3v mod" (cutting the trace to pin 28). The software is fine; the hardware is dangerous.
AsProgrammer 21013 appears to be a handle/version identifier used in coding communities and repositories; below is a concise, shareable blog post explaining the term, possible contexts, and how developers can respond or use it. asprogrammer 21013
The central component of the ASP21013 is the CH340 USB-to-UART bridge controller (commonly the CH340G or CH340C variant).
ASProgrammer 21013 is unsigned and may trigger Windows Defender/SmartScreen. This is normal for many open-source programming tools. Just download it from a trusted source (like the official GitHub or known tech forums). This is the $2 USB dongle found on
Use this version if:
Avoid this version if:
While newer versions exist, 21013 is often recommended because it hits a sweet spot: