The DSOTC2 (Digital Storage Oscilloscope Transceiver, Version 2) requires a firmware update process, which involves placing the device in bootloader mode to replace system files with updated .bin or .upd files. Key updates enhance sampling stability, battery management, and UI languages, and typically, the device automatically verifies and installs the update upon rebooting after a file transfer. For the latest firmware and support, visit the manufacturer’s official support portal.
The FNIRSI DSO-TC2 firmware update process is a unique "two-track" system because the device essentially houses two separate instruments—an oscilloscope and a component tester—each requiring its own distinct update. The Dual-Firmware System
Unlike typical gadgets, you cannot update the entire TC2 in one go. The firmware is split into two parts based on their function:
CHD Prefix: These files update the Oscilloscope functionality.
CHT Prefix: These files update the Transistor/Component Tester side.
Key Constraint: You must update these one at a time. If you need both, you must repeat the entire upgrade cycle for each file. How to Perform the Update
Updating is handled via a PC connection using a Micro-USB data cable. Connect: Plug the device into your PC while it is off.
Update Mode: Press the power button to enter update mode; your computer should recognize it as a USB drive.
Transfer: Copy the specific firmware file (starting with CHD or CHT) directly onto that drive. dsotc2 firmware upd
Auto-Update: The device will process the file automatically. Once the progress bar hits 100%, the current mode is updated. Why Update? Community Observations
While the Official FNIRSI Site provides standard bug fixes, the community often seeks updates to address known quirks:
Calibration Fixes: Firmware updates are often necessary to fix the "zero line" offset on high voltage ranges or timing inaccuracies on low time-per-division settings (like the 5μs/div range).
Interface Overhauls: Third-party enthusiasts sometimes develop custom firmware to simplify the "convoluted" original UI, which users have criticized for being non-intuitive.
Measurement Accuracy: Updates can refine the ESR (Equivalent Series Resistance) detection, which sometimes fails to account for added resistance in earlier factory versions.
Updating your FNIRSI DSO-TC2 firmware requires connecting it to a PC in a specific boot mode to copy over the update file. 🛠️ Update Steps
Download: Get the latest .bin firmware file from the FNIRSI Software Downloads page.
Connect: Use a USB-C data cable to connect the device to your PC while it is powered off. Step 3: Choose Update Method There are two
Boot Mode: Turn the device on and wait approximately 2 seconds.
Verify Drive: Your PC should recognize a new drive named "CH BOOT".
Transfer: Copy your downloaded firmware file into this drive.
Complete: A prompt saying "Update completed" will appear at the bottom of the device screen once finished. 💡 Crucial Tips
Cable Choice: Ensure you use a USB-A to USB-C cable; some users report that USB-C to USB-C cables do not work for this process.
Dedicated Drive: The "CH BOOT" drive is a virtual disk for updates only; do not try to store other files there.
Manuals: If you need the full button layout, you can find the DSO-TC2 User Manual on the official site. If you're having trouble getting the "
" drive to appear, would you like troubleshooting steps for your PC's USB drivers? Format the SD Card: Format a microSD card to FAT32
There are two main ways these devices update:
Method A: SD Card Update (Most Common) If your TC2 has a microSD card slot, this is the standard method.
update.bin or DSOTC2.hex) to the root directory of the SD card (do not put it inside a folder).Method B: USB PC Connection If you do not have an SD slot, or if the update requires a PC tool:
.hex or .bin file, and click "Upgrade" or "Flash."A firmware update will reset all settings to factory defaults and may erase the microSD card. Copy any important videos or photos to your computer before proceeding.
| Problem | Possible Solution | |---------|------------------| | Device not recognized | Check USB drivers (STSW-LINK009 or virtual COM port). | | Update stuck at 0% | Wrong firmware file or corrupted SD card. | | Blank screen after update | Firmware mismatch; try recovery mode or reflash with correct version. | | Buttons unresponsive after update | Perform a factory reset (option in menu or reset jumper). |
dsotc2-flasher --port USB --write firmware_v2.1.4.bin
| Model Variant | Latest Version | Download Link | | :--- | :--- | :--- | | DSOTC2-Pro | 2.1.4 | Download .bin | | DSOTC2-Lite | 2.1.4 | Download .bin | | DSOTC2-Edge | 2.1.4-LTS | Download .bin |
SHA256 checksum available in the /checksums directory of your download.
| Error Message | Likely Cause | Solution | | :--- | :--- | :--- | | "Device not found" | Driver missing | Install the CP210x USB-to-UART driver. | | "Flash verification failed" | Corrupt download | Re-download the .bin file and retry. | | "Timeout during erase" | Power fluctuation | Use a powered USB hub. | | "Invalid hardware revision" | Wrong file for variant | Download the correct firmware for Rev C. |