Fnirsi Dso-tc2: Firmware

Look for a drive named "CH BOOT" on your computer. Action: Copy the CHD firmware file into this drive.

As of 2025–2026, Fnirsi has released only a handful of firmware updates for the DSO-TC2. These updates fixed minor bugs (e.g., screen calibration, battery readout) but added no new features. The company appears to have moved on to newer models like the DSO-TC3 and DSO-TC4, which share similar firmware but with minor tweaks.

Strings extracted ( strings internal_firmware.bin ):

To understand the DSO-TC2’s firmware, one must first acknowledge its ancestry. The component tester functionality is clearly derived from the famous open-source project by Markus Frejek and Karl-Heinz Kübbeler. This project, originally designed for 8-bit AVR microcontrollers, provides automatic identification and characterization of resistors, capacitors, diodes, transistors, and even thyristors. Fnirsi’s engineers ported this logic to the STM32 platform, wrapping it in a more modern graphical interface. fnirsi dso-tc2 firmware

Once the update completes, the device may reboot automatically or shut down. If it shuts down:

measurements for capacitors, a feature often requested by users and later addressed in subsequent models like the DSO-TC3. : The firmware-driven signal processing is limited to a 200kHz bandwidth 2.5MS/s real-time sampling rate

: Boot the device and wait approximately 2 seconds. A drive named should appear on the computer. File Transfer : Copy the appropriate or firmware file (prefixed with ) into the root directory of this drive. Completion Look for a drive named "CH BOOT" on your computer

You can find official firmware files and user manuals on the page. If the file is not listed under the specific TC2 model, check the FNIRSI Official Firmware Upgrade section for general updates. Troubleshooting Tips

Do download firmware from random file-sharing sites. FNIRSI does not host files on a centralized "auto-update" server. Instead:

— FNIRSI DSO-TC2, firmware reverse engineering, embedded security, oscilloscope, STM32, JTAG, SPI flash. These updates fixed minor bugs (e

The FNIRSI DSO-TC2 is an incredibly versatile 3-in-1 handheld device, combining a digital oscilloscope, a transistor tester, and a signal generator into one compact package. Its affordability and utility make it popular among hobbyists and technicians. However, to ensure optimal performance, fix bugs, and potentially unlock new features, keeping its firmware up to date is essential.

Download the latest firmware ZIP file from the official FNIRSI website.

A basic, pocket-sized scope for analyzing low-frequency electronic waveforms.