Downloading firmware from unverified third-party forums carries a high risk of bricking your device. Always source your files from official channels:
Swap out the USB-C cable. Many bundled cables are charge-only. Try a different USB port on your PC, preferably a USB 2.0 port directly on the motherboard rather than a front-panel hub. 2. Update Fails Mid-Way or Throws an Error
Before flashing any custom firmware, you must back up the original. Using a tool like stm32flash (for Linux) or a USB DFU tool, you can read the existing flash memory and save it as a .bin file. This is your lifeline to revert to stock. fnirsi dso-tc2 firmware
that supports data transfer. The device must be in a specific "boot" or "upgrade" mode to be recognized as a removable disk. Upgrading the Oscilloscope Subsystem (CH Upgrade) Connection : Power off the device and connect it to a PC. Mode Entry
Introduce new features or better user interface layouts. Preparing for the Firmware Upgrade Try a different USB port on your PC, preferably a USB 2
This indicates a firmware mismatch. You likely flashed a firmware file meant for a different internal MCU revision (such as flashing a DSO-TC3 file to a TC2, or mixing up internal board variants). Re-download the correct legacy version and flash it blindly or via forced bootloader mode.
Always ensure the battery is charged before starting. Some users report units failing to boot if the process is interrupted. Oscilloscope Transistor Tester Using a tool like stm32flash (for Linux) or
: Ensure the DSO-TC2 battery meter reads above 70% to prevent unexpected shutdowns mid-flash. Downloading Official Files Safely