Asprogrammer+21013 ((link)) Now

, a popular open-source utility used for reading and writing serial memory chips like EEPROMs and SPI Flash. It is most commonly used in conjunction with the

The hardcore hardware community discovered a permanent fix for the 21013 error: on the MISO line (pin 2 of the CH341A chip to pin 9 - VCC). The CH341A’s internal pull-ups are weak. When flashing at default speeds, the MISO line floats, leading to the 21013 timeout. Adding an external 10k resistor solves this permanently. asprogrammer+21013