esptool.py --port COM3 erase_flash Then upload your sketch. The erase command removes the lock flag and clears the "full" condition.
If you have arrived at this page, you are likely staring at a frustrating error message on your screen: "Flashing lock flag is locked, please unlock it first full." This cryptic warning can stop a project dead in its tracks, whether you are working with 3D modeling software, CNC machining, or even certain proprietary firmware for electronic locks or storage devices. flashing lock flag is locked please unlock it first full
If the error returns, a physical limit switch might be stuck closed. Inspect your X, Y, and Z endstops. A stuck switch permanently raises the lock flag. Part 2: Embedded Systems and Firmware Flashing (Arduino/ESP32) The second most common context is when you are trying to upload code to a microcontroller. The error might appear in the Arduino IDE or PlatformIO as: "Flashing lock flag is locked – please unlock it first (full storage)" . esptool
By following the step-by-step fixes in this article, you can resolve the error in under three minutes and return to productive work. Have a different variation of this error? Share your specific device model and error log in the comments below, and we will help you troubleshoot further. If the error returns, a physical limit switch
In your G-code sender (UGS, LightBurn, Candle), type the following command exactly: