While holding the button, plug the USB-C cable into the oscilloscope.
If the device shows up as an STM32 bootloader, download the free software. Connect via USB in the software. Clear the flash memory (Full Chip Erase).
: Due to the complexity of these revisions, Owon support has occasionally advised users not to upgrade unless a specific fix is required for their serial number. How to Check Your Firmware Version
If you have confirmed that a compatible update exists for your hardware, follow these steps: What is the latest FW version for OWON HDS2102s? - EEVblog owon hds2102s firmware update fix
To update the firmware on your Owon HDS2102S and resolve issues like the 2ns/div display bug
: Updates generally refine the handheld's responsiveness, though some "quirks" like the "Auto" function occasionally defaulting to an inactive Channel 2 may persist in older versions. Critical Hardware Warnings
| Error / Problem | Solution | |----------------|----------| | “Update file not found” | – Re‑copy file to USB root. – Rename to HDS2102S.upg (case‑sensitive on some units). – Try another USB drive (2.0, ≤8GB). | | Update hangs at 0% / 50% | – Corrupted file: re‑download firmware. – Bad USB: reformat or change drive. – Interrupted: restart recovery mode (Step 2). | | Device now has white screen / no backlight | – Hardware brick? Try JTAG recovery (advanced, not covered here). Contact OWON support. | | Update succeeds but touch/buttons wrong | – Perform Factory Reset (Step 4) again. – Re‑install the previous known‑working firmware if available. | | USB drive not recognized at all | – Format as FAT32 with partition table (not GPT). – Use a smaller drive (2GB–8GB). – Try a different brand (Kingston, SanDisk often work). | While holding the button, plug the USB-C cable
Follow this advanced recovery method to force-flash the correct firmware. Step 1: Use the Hard Reset Key Combination
Before attempting to fix the issue, check the device's status:
The device screen will either remain black or display a dedicated "Upgrade Mode" text. You can now release the button. Run the Software Launch the Owon upgrade executable tool on your PC. Clear the flash memory (Full Chip Erase)
The is a 2‑channel, 100 MHz handheld digital oscilloscope with multimeter functions. Like many embedded instruments, its firmware can be updated via USB (using a .upg file on a FAT32‑formatted USB drive). However, users occasionally experience:
Launch the upgrade tool. If the software recognizes the base chip interface (CH340 or similar internal bridge), attempt to re-flash the recovery firmware directly.
The device will automatically upgrade and shut down when finished. ⚠️ Important Fixes & Risks