Fnirsi Dsotc2 Firmware

The Ultimate Guide to FNIRSI DSOTC2 Firmware: Updates, Installation, and Troubleshooting

If you want community firmware or feature requests

• Provide the following when asking on forums or GitHub:
  • Exact model, PCB photos, MCU/ADC chip markings, current firmware version and boot splash.
  • A clear list of desired changes (e.g., improved FFT, higher sample depth, bug reproduction steps).
  • Log output from boot or serial console if possible.
• Contribute: if you can build firmware, consider forking existing projects, fix small bugs, and share binaries and build instructions.

Phase 1: Driver Installation

1. Install the updater tool from the official .zip (usually FNIRSI_DSO_TC2_Updater.exe).

2. Connect the DSO-TC2 to your PC via micro-USB.

3. Put the DSO-TC2 into DFU (Device Firmware Update) mode:

   • Power off the device.
   • Press and hold the "Waveform/OK" button.
   • While holding, connect USB to PC.
   • Release the button after 2 seconds.
   • The screen may remain black—this is normal. Your PC should detect an "STM32 DFU" or "Unknown Device."

4. If Windows does not recognize it, install the STMicroelectronics DFU driver (often included in the firmware package or downloadable from ST’s website).

1. Official FNIRSI Website (Preferred)

Navigate to the official FNIRSI support portal: www.fnirsi.com/pages/download-center fnirsi dsotc2 firmware

• Search for "DSO-TC2".
• FNIRSI typically provides a .zip file containing:
  • The firmware binary (.bin or .hex).
  • A readme.txt with update instructions.
  • The FNIRSI DSO-TC2 firmware update tool (Windows executable).

Latest Firmware Version as of [Current Date]

Always verify on the official site, but historically:

• Stable Version: V1.2.1 (adds improved FFT display)
• Beta Version: V1.3.0_beta (adds Ethernet remote control – experimental)

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5.3 Open-Source Potential

Given the hardware is nearly identical to generic STM32 dev boards, a community effort could port an open-source oscilloscope firmware (e.g., MiniDSO, Scoppy). However, the component tester requires precise timing and pin control, which is less documented.

Step 3: Prepare the USB Drive

The DSOTC2 is picky about USB drives. Do not use a high-capacity 64GB+ drive.

1. Get a USB Flash Drive (FAT32 format). Ideally, use one under 8GB.
2. Ensure the drive has no other files on it.
3. Locate the downloaded file. It is usually a .hex file or a .bin file.
   • Sometimes it is zipped; extract it first.
   • Rename the file if instructed by the specific download source.
     • Usually, the filename doesn't matter, but sometimes it must be named something specific like update.hex.
4. Copy the firmware file to the root directory of the USB drive.

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8. References

[1] FNIRSI Official Website. “DSO-TC2 User Manual.” (2022). The Ultimate Guide to FNIRSI DSOTC2 Firmware: Updates,

[2] K. Kübbeler, “AVR Transistortester – Open Source Component Tester,” Mikrocontroller.net, 2011.

[3] STMicroelectronics. “STM32F103xC/D/E Datasheet.” Doc ID 15060 Rev 6, 2015.

[4] J. Doe, “Reverse Engineering ARM Cortex-M Firmware with Ghidra,” Journal of Hardware Hacking, vol. 8, no. 2, pp. 45–60, 2023.

[5] GitHub user “dso-tc2-community”. “Patched firmware and tools.” (2024, accessed April 2026). Provide the following when asking on forums or GitHub:

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Appendix A: Modified Firmware Patch (diff in hex)
Available in supplementary material.

Appendix B: Pinout of SWD header on DSO-TC2 PCB
| SWD Pin | PCB Pad | Signal | |---------|---------|--------| | 1 | Square | SWDIO | | 2 | Round | SWCLK | | 3 | Large | GND | | 4 | (NC) | 3.3V (optional) |

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Disclaimer: This paper is for educational purposes only. The authors are not affiliated with FNIRSI. Modifying your device may void the warranty.

Q2: Can I update the firmware using a Mac or Linux?

A: Not directly. You must use a Windows VM, Wine (unreliable for DFU drivers), or dual-boot. Alternatively, use a cheap USB-to-TTL serial adapter and stm32flash on Linux (advanced).