— FNIRSI DSO-TC2, firmware analysis, oscilloscope, component tester, reverse engineering, embedded systems, ARM Cortex.
The DSO-TC2 integrates a digital oscilloscope, transistor tester, signal generator, continuity test, voltage measurement, and temperature/humidity sensing into a single portable unit. Because the hardware relies on a microcontroller to manage these distinct modes, firmware updates are critical. Firmware updates for this device typically address:
Improving sampling stability and reducing noise floor levels.
Mastering Your FNIRSI DSO-TC2: A Complete Guide to Firmware and Functionality (2026 Edition) fnirsi dsotc2 firmware
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.
Until then, the current ecosystem is mature and stable. By keeping your device updated, you ensure that this $60 oscilloscope-tester combo punches well above its weight class.
[4] J. Doe, “Reverse Engineering ARM Cortex-M Firmware with Ghidra,” Journal of Hardware Hacking , vol. 8, no. 2, pp. 45–60, 2023. Until then, the current ecosystem is mature and stable
Updates often tweak the user interface for better readability, faster refresh rates in oscilloscope mode, and more intuitive button mapping. Prerequisites for Flashing Firmware
Flashing community-made custom firmware carries a risk of bricking the device or rendering the oscilloscope side unusable, as the oscilloscope functionality relies on proprietary FNIRSI code. Always back up your original firmware if your flashing tool allows reading the MCU flash memory. Troubleshooting Common Firmware Issues
the old firmware file currently on the "Removable Disk" (if one is visible). faster refresh rates in oscilloscope mode
The screen may remain blank or display an upgrade prompt, indicating it has successfully entered bootloader/ISP mode. Step 4: Flash the Firmware Using the Burning Tool
Which of these would you like?