Updating the firmware for the Furious FPV True-D diversity receiver depends largely on which hardware revision you own. While newer versions feature an integrated USB port for direct flashing, older units require an external FTDI adapter. Oscar Liang Core Update Guides and "Papers"
The most comprehensive technical documentation for this process can be found in the official user manuals and reputable community guides: Official V3.7/V3.8 Manual User Manual for True-D V3.7
provides a complete overview of features and calibration requirements. Legacy Hardware (V1/V2) Update Paper : For users with older modules, Oscar Liang's guide
is the gold standard for detailing the pinout connections (DTR, TX, RX, VCC, CTS, GND) needed for an FTDI adapter. XLoader Configuration : Most updates utilize the utility. Standard settings include: Uno(ATMega328) Firmware Version Highlights
Different firmware versions introduced specific functional improvements:
: Featured an optimized RSSI algorithm and improved user interface. : Introduced a dedicated True-D 4.0 uploader tool and required virtual COM port drivers.
: The only model that supports wireless firmware updates via a smartphone app and Critical Post-Update Step: Calibration
After flashing any new firmware, you must recalibrate the RSSI to ensure the diversity switching works correctly: Remove Antennas : Both antennas must be removed from the module. Position VTX
: Place a quad or video transmitter (VTX) at a distance—typically 2 meters (6-8 feet) : Set the VTX to if possible for the most accurate calibration. : Navigate to the menu on the module and select Oscar Liang pinout diagram for an FTDI adapter or a link to the latest How To Update True-D V3 Firmware to v3.2
The firmware for Furious FPV True-D modules has evolved significantly across different hardware versions (V1 through True-D X), improving signal stability and adding features like Bluetooth connectivity and OSD support. Firmware Comparison by Module Version Module Version Notable Firmware Features Primary Update Method True-D X
Advanced analog processing, OSD display, Follow Mode (VTX control), Find Mode [14, 16]. Bluetooth via TrueDX Smartphone App [14, 16]. True-D V3.9 furious fpv true-d firmware
Improved Smooth Switch technology, 40 channels, multi-button navigation [12]. Built-in USB Port [12, 19]. True-D V3.5-3.8
Higher RSSI resolution, manual/auto/working modes, and "Filter" settings for antenna switching [11, 19]. USB or FTDI depending on specific revision [12, 19]. True-D V1 / V2 Basic diversity switching, 40 channels [1]. External FTDI Adapter required (TX/RX/VCC/GND pins) [1]. Key Performance Improvements
Smooth Switch Technology: Newer firmware versions (V3.5+) use an updated diversity algorithm that actively searches for the strongest signal to provide smoother transitions between antennas, often compared to Clear View performance [2, 12, 13].
RSSI Resolution: Firmware updates increased the resolution of Received Signal Strength Indicators (RSSI), allowing the module to make faster and more accurate switching decisions [2, 11, 19]. Operational Modes: Auto Mode: Scans all bands to lock on the strongest signal.
Manual Mode: Allows users to scroll through all 48 channels manually.
Working Mode: Restricts scrolling to 8 user-saved favorite channels [11]. Critical Hardware/Firmware Issues
FatShark Damage Risk: Early True-D V3 units (approx. March 2017) had a hardware flaw where an external force could cause a short circuit, damaging the FatShark goggle's LDO component [7, 15].
Solution: Ensure your V3 module has the plastic isolation spacers installed between the boards [15].
Power On Issues: Some users report "Red LED on" but no display; this often relates to firmware corruption or incompatible power levels during a flash [1, 23]. Updating Your Firmware
For True-D X: Power on your goggles with the module, open the TrueDX App on your phone, put the module in "Bootloader Mode" (hold bottom button during power-up), and flash via Bluetooth [4, 16]. Updating the firmware for the Furious FPV True-D
For V3/V3.5/V3.8: Use a micro-USB cable. Download the latest .hex files and flashing tools like XLoader from Furious FPV's support pages [1, 12].
For V1/V2: Connect an FTDI module to the internal 6-pin header (DTR, TX, RX, VCC, CTS, GND). Set XLoader to ATmega328 at 57600 baud rate [1].
You're looking for a review of the "Furious FPV True-D Firmware". Here's what I found:
What is Furious FPV True-D Firmware?
Furious FPV is a popular brand in the FPV (First-Person View) drone community, known for their high-quality video transmitters, receivers, and other FPV gear. The True-D Firmware is a software update designed for their True-D series of video receivers.
Key Features of True-D Firmware:
The True-D Firmware is designed to provide a more stable and reliable video signal, with improved performance and features. Some key features include:
Review:
Here's a summary of reviews and feedback from FPV enthusiasts:
Ratings:
Conclusion:
The Furious FPV True-D Firmware is a solid choice for FPV enthusiasts looking to improve their video receiver performance. It offers reliable and stable video signal, improved noise reduction, and easy configuration. While some users reported issues with updating the firmware, overall, it's well-regarded in the FPV community.
Keep in mind that firmware updates can sometimes be specific to individual hardware configurations, so be sure to check compatibility and follow the update instructions carefully.
If you're considering upgrading to the True-D Firmware, I'd recommend checking out the Furious FPV website, Reddit, or FPV forums for more detailed reviews, tutorials, and support resources.
Flashing Pirx is exactly the same process as flashing official firmware (Serial UART method above). You simply download the .hex or .bin file from the Pirx GitHub repository instead of the Furious FPV one.
Note: Once you flash Pirx, you cannot go back to official firmware without repeating the UART flashing process.
Furious FPV released several official firmware versions (v1.0 to v2.5). These were stable and included basics like Raceband, band scanning, and auto-search.
However, the module gained legendary status thanks to Rotor Riot and the open-source community. A developer named "Schwee" (and later contributions from "Skaman" and others) created an unofficial, feature-packed firmware often referred to as the "True-D V3" or "Rotor Riot Edition."
Most pilots today are referring to this community firmware when they talk about the True-D.
Modern FPV goggles like the FatShark HDO2 have slightly different input voltage tolerances. Official v2.0 and v2.5 firmware include patches to reduce input lag when used in analog bays next to digital modules (like the Shark Byte VRX). Diversity receiver : The True-D firmware enables the
Updating the True-D firmware required a specific process that was more cumbersome than modern standards (which often use OTA or simple USB).
.bin firmware file.