Firmware is the low-level software programmed directly into the DSO-TC2’s hardware. It controls how the oscilloscope displays signals, how the transistor tester detects components, and how the user interface reacts. Updating the firmware can:
Ultimate FNIRSI DSO-TC2 Firmware Guide: Upgrades, Flashing, and Custom Fixes
Every time you flash the firmware on a transistor tester or oscilloscope, the internal lookup tables are wiped clean. You must recalibrate the hardware immediately to get accurate readings. To Calibrate the Transistor Tester:
Click "Browse" or "Open File" and select the downloaded .bin / .hex firmware file. Step 4: Flash the Device Click or Download . fnirsi dso-tc2 firmware
If you need to update both the CHD and CHT firmware, repeat Steps 1 through 5 for the second file.
Once the copy is finished, safely eject the drive from Windows. Unplug the USB cable.
Download the firmware ZIP archive to your PC. Extract the contents to a dedicated folder on your desktop. Inside, you should find the burning tool executable (e.g., FNIRSI_Update_Tool.exe ) and a .bin firmware file. Step 2: Boot the DSO-TC2 into Bootloader Mode Firmware is the low-level software programmed directly into
Unlike major brands like Rigol or Siglent, FNIRSI does not host a centralized, official "download center" for legacy firmware. Firmware updates are typically distributed via:
As of 2026, the hobbyist community continues to develop custom firmware for FNIRSI devices, aiming for: Faster refresh rates for the oscilloscope. Better resolution for testing components. Improved user interface customization.
This comprehensive guide covers everything you need to know about finding, preparing, and flashing the latest firmware onto your device. Why You Should Update Your DSO-TC2 Firmware You must recalibrate the hardware immediately to get
| Problem | Likely Cause | Solution | |---------|--------------|----------| | PC doesn’t detect the device | Wrong USB cable (charge-only) | Use a data-sync cable or try a different USB port. | | Update tool shows "No device" | Not in DFU mode | Repeat the "hold OK + plug USB" sequence. Sometimes you need to hold for 10 seconds. | | Update fails at 50% | Wrong firmware for hardware revision | Double-check your hardware version. Downgrade to a previously working file if possible. | | Device won’t power on after update | Corrupted bootloader | This is a . You’ll need an ST-Link programmer to reflash the bootloader (advanced fix). | | Touchscreen acts weird after update | Calibration lost | Go to System Settings → Calibration → Follow the crosshair prompts. |
Latest firmware files (Download from the official FNIRSI website ).