Here is the catch that drives most pilots crazy: Furious FPV has taken down most of their official firmware repositories.
If you go to their website today, finding the original True-D_v3.8.hex (or similar) file is nearly impossible. The module has been discontinued, and the support pages are ghosts.
But don't throw your module away.
The community has stepped up. The most stable, battle-tested firmware still floating around in Discord channels and Google Drives is version 3.8. Here is what it fixes:
Updating is straightforward, but requires patience. Do not interrupt the power during flashing.
The Furious FPV True-D is a piece of FPV history. Its longevity is a testament to open-source collaboration. While the original company has moved on to other products (like the True-D X and digital systems), the community firmware keeps this module relevant.
Bottom line: If you own a True-D, stop reading and go update it. You are not flying at its full potential yet.
Disclaimer: Flashing firmware carries inherent risk. Ensure you have the correct files for your specific hardware revision. The author is not responsible for bricked modules.
The Furious FPV True-D firmware is widely regarded as a benchmark for user-friendly FPV receiver software, particularly for its intuitive Easy View interface and deep integration with FatShark goggles.
While it has evolved through several versions (the most common being V3.x, V4.0, and the True-D X firmware), the core experience remains focused on balancing feature-rich performance with operational simplicity. Key Features & Capabilities
Intuitive OSD Integration: Recent versions (V4.0 and True-D X) allow you to access the full menu within your goggles, so you can change channels or settings without removing them.
Smart Search & Band Scanning: The firmware excels at quickly identifying active frequencies and displaying them on a high-resolution LCD or OLED screen.
Smooth Switch Technology: The diversity algorithm actively compares RSSI signals to switch between antennas seamlessly, reducing video dropouts.
Lap Timer & Find Mode: Specialized modes allow for lap timing based on RSSI strength and a "Find Mode" that uses signal strength to help locate lost drones.
Mobile App Support: For the True-D X model, firmware updates and configuration can be handled via Bluetooth and a mobile app, removing the need for a USB cable in the field. Performance vs. Competition True-D Firmware Competition (e.g., RapidFire) Interface Highly intuitive with graphics and animated icons. Functional but often described as less user-friendly. Diversity Traditional high-speed diversity switching. Advanced image fusion/splicing for better clarity. Price Point Generally more affordable for 75-80% of the performance. Premium pricing for the absolute best signal processing. Technical Considerations FuriousFPV True-D X - Module Overview
To update and calibrate your Furious FPV True-D firmware, follow the steps below based on your module version. 1. Identify Your Module Hardware furious fpv true-d firmware
The update method depends on whether your module has a built-in USB port:
V3, V3.5, V3.7, V4, and True-D X: Feature a built-in micro USB port for direct connection to a PC.
V1 and V2: Lack a USB port and require an FTDI adapter (set to 5V) connected to the 6-pin header on the module. 2. Firmware Update Procedure
Download Files: Get the latest firmware (.hex file) and the XLoader utility from the official Furious FPV Download Page. Prepare XLoader: Unzip the files and run XLoader.exe as an administrator. Select your downloaded .hex file in the "File" field.
Device Settings: Set "Device" to Uno(ATmega328) or ATmega328. Baud Rate: Set to 57600. Connect and Flash:
Plug the module into your PC. Identify the correct COM Port assigned to it in XLoader.
Click Upload. The module screen will go blank during the process.
Once complete, XLoader will display "done" or the total bytes uploaded. 3. Essential Calibration
Calibration is mandatory after any firmware update to ensure both internal receivers are balanced for signal strength. Preparation: Remove all antennas from the True-D module.
Power On: Turn on a video transmitter (VTX) at 25mW power and place it approximately 2 meters (6–8 feet) away. Run Calibration: Enter the module menu by pressing the center button. Navigate to Settings > Calibrate.
Follow the on-screen prompts; the module will scan and calibrate itself to the VTX signal. Save: Once finished, select Save and Exit.
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.
This comprehensive guide details the firmware landscape for the Furious FPV True-D
series, covering version histories, key features, and update procedures for various hardware revisions. Firmware Version History & Features
The True-D firmware has evolved through several major iterations to improve diversity algorithms and user interface.
V3.9 (Latest for V3.5/V3.8 hardware): Features an improved algorithm, a new menu layout, and shared firmware compatibility between the goggle module and the Furious FPV Dock-King.
V3.8: Introduced significant changes to the diversity algorithm, reported to provide smoother video switching and performance comparable to high-end systems like ClearView.
V4.0 & True-D X: Represents a hardware and firmware shift. These versions include an integrated OSD menu (allowing channel selection without removing goggles), a built-in lap timer, and a "Find Mode" for lost drones. Updating Firmware by Hardware Version
The update process varies significantly depending on the age of your module. True-D V1 & V2 (Legacy) These modules lack a USB port and require an FTDI adapter. Here is the catch that drives most pilots
Preparation: Remove the module cover to access the 6-pin header (DTR, TX, RX, VCC, CTS, GND).
Connection: Connect the FTDI adapter (set to 5V) to the module. Ensure TX on the adapter goes to RX on the module and vice versa.
Flashing: Use XLoader software. Select the .hex firmware file, set the device to "ATmega328," and baud rate to 57600. True-D V3.x & V4.0
These versions feature a built-in micro USB port for easier flashing.
Connection: Connect the module directly to a PC via micro USB.
Software: Run XLoader as an administrator. Select the firmware file and the correct COM port.
Upload: Set the device to "Uno(ATMega328)" and click upload. True-D X (Bluetooth) The True-D X updates wirelessly.
Bootloader Mode: Hold the bottom button while powering on the goggles to enter bootloader mode.
App Update: Open the TrueDX App on a smartphone, select the module via Bluetooth, and initiate the flash. Critical Step: Post-Update Calibration
Every firmware update requires a full recalibration to ensure the diversity algorithm accurately compares signals from both antennas. Setup: Remove all antennas from the module.
Distance: Place a 25mW video transmitter (VTX) approximately 1–2 meters away.
Process: Navigate to the "Settings" menu on the module and select Calibrate. Once complete, select "Save & Exit".
⚠️ Warning: Flashing community firmware voids any support from Furious FPV. Some versions break diversity switching.
Status: Discontinued / Unsupported
| Version | Notes | |---------|-------| | v1.5 | Last stable official build | | v1.6 beta | Added RSSI out but buggy | | Community v2 (unoff.) | Fixes band scan hangs, better OLED handling | Disclaimer: Flashing firmware carries inherent risk
Early versions of the True-D firmware had issues with Pit Mode (low-power transmission for race pits). Pilots reported the receiver locking onto the wrong frequency or failing to exit Pit Mode cleanly. Newer firmware refines the pit mode handshake.