Neoprogrammer 21019 Ch341a Link Work -

This indicates the chip failed to erase or accept new data. This happens if the chip is write-protected, receives insufficient voltage (the 5V/3.3V bug conflict), or the chip itself is physically defective.

While version is very stable, the latest available version as of 2026 is 2.2.0.10 . Both versions are based on the open-source AsProgrammer project but were significantly refined by developer TTAV134 . Download Links : neoprogrammer 21019 ch341a link