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Extract the downloaded file. It will typically contain a .bin or .hex firmware file. Enter Update Mode: Turn off the device.
The Ultimate Guide to FNIRSI DSO-TC2 Firmware Updates The FNIRSI DSO-TC2 is a highly popular, budget-friendly 2-in-1 handheld digital oscilloscope and transistor tester. While it offers incredible value out of the box, updating the firmware is the best way to fix bugs, improve measurement accuracy, and unlock potential new features. fnirsi dso-tc2 firmware
— FNIRSI DSO-TC2, firmware reverse engineering, embedded security, oscilloscope, STM32, JTAG, SPI flash.
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. Knowing this will allow me to provide more
Because the official firmware support was inconsistent, the community took matters into their own hands. The most interesting development in the TC2 firmware scene is the "Porting" phenomenon.
Only update one part of the firmware at a time. The device will restart between updates. Step-by-Step: How to Upgrade FNIRSI DSO-TC2 Firmware Enter Update Mode: Turn off the device
Turn the device on. It may take a few seconds to update, after which it should boot normally with the new firmware. Custom Firmware and Community Upgrades (2026 Trends)
The DSO-TC2 has two separate parts, each requiring its own firmware update: Oscilloscope Firmware: Files typically start with CHD . Transistor Tester Firmware: Files typically start with MM . Required Tools: FNIRSI DSO-TC2 Device
if (probe_setting == 1) attenuation = 1.0; else attenuation = 10.0;
As noted in one early review (August 2022), no new firmware had been released at that time. It is unclear whether FNIRSI has released subsequent updates, so when downloading firmware from unofficial sources. Always verify that files are from trusted distributors before applying any update.