Set the baud rate as instructed by the firmware readme text (usually 115200 or higher). Step 5: Flash the Firmware
After the transfer completes, unplug the device and power it on. Alternatives: Custom Firmware and Community Support
Get the latest official firmware from the FNIRSI Manuals & Firmware Download Page . 2. Entering Upgrade Mode For the Oscilloscope (CH Upgrade): Ensure the device is OFF . Connect it to your PC via the USB cable.
Most FNIRSI handhelds require a specific button combination to enter "Bootloader" or "Update" mode. fnirsi dsotc2 firmware
Click or Burn . Wait for the progress bar to reach 100%. Step 4: Post-Update Calibration
Replace the battery if it fails to hold a charge after a few years.
Click the , "Download" , or "Burn" button in the software. A progress bar will indicate the transfer status. Do not bump the cable or close the program during this time. Once completed, the software will show a "Success" or "Verification OK" message. The DSO-TC2 will typically reboot automatically into its standard operating mode. Post-Update Calibration Set the baud rate as instructed by the
Wait for the progress bar to reach 100%. Do not touch the cable or turn off the computer during this time. Step 5: Reboot and Calibrate
Ensure your DSO-TC2 has at least a 50% charge to prevent it from dying mid-flash.
You cannot "extract" firmware directly, but you can report bugs effectively: Most FNIRSI handhelds require a specific button combination
Click "Open File" or "Choose" and navigate to the extracted firmware file ( .bin or .hex ).
This paper describes the methodology to extract, disassemble, and analyze the DSO-TC2 firmware, and presents a structured overview of its key subsystems.