6 Full UARTs<\/li>\n<\/ul>\n\n\n\nWith 6 UARTs, you have more than enough ports for your GPS, ELRS\/CRSF receivers, SmartAudio, VTX, and even external modules like Bluetooth\/GPS trackers or HD OSD.<\/p>\n\n\n\n<\/span>Why Choose the SpeedyBee F405 V4?<\/span><\/h2>\n\n\n\n<\/span>Worth for the Money<\/span><\/h3>\n\n\n\nThe SpeedyBee F405 stack’s unparalleled value has always been its most notable feature. A feature-rich flight controller and a respectable 4-in-1 ESC that can compete with more expensive options are yours for $65.99. With the release of the V4, the ESC is upgraded from 50A to 55A, and the FC receives a number of improvements.<\/p>\n\n\n\n
<\/span>Quality of Design and Construction<\/span><\/h3>\n\n\n\nThe V4 and the V3 may initially appear to be similar because of their dark PCB color and the recognizable yellow rubber gummy for gentle attachment. With sizable solder pads that are convenient to work with, the board layouts are quite comparable.<\/p>\n\n\n\n
<\/span>Setting Up Wireless<\/span><\/h3>\n\n\n\nNearly all of SpeedyBee’s flight controllers, regardless of price, come with built-in Bluetooth modules. With the “SpeedyBee” app on their phones, customers can wirelessly configure their ESC and flight controller thanks to this capability. This feature removes the need for a computer and makes PID tuning in the field simple and rapid.<\/p>\n\n\n\n
<\/span>FPV System Compatibility<\/span><\/h3>\n\n\n\nThis stack’s adaptability is ensured by its compatibility with both digital and analog OSD. All of the DJI video transmitters, including the DJI O3, Full Size Air Unit, and Runcam Link (Caddx Vista), may be used with the V4 flight controller. Cables for each of these VTXs are included in the kit.<\/p>\n\n\n\n
Additionally, this FC works with all other HD systems, including HDZero and the Walksnail Avatar. However, some systems do not come with cords, so you may need to solder additional wires yourself.<\/p>\n\n\n\n<\/span>What is the difference between SpeedyBee F405 V3 and V4?<\/span><\/h2>\n\n\n\nThe SpeedyBee F405 V4 is more than just an incremental upgrade over the V3. Here\u2019s a side-by-side comparison to show you exactly what\u2019s new:<\/p>\n\n\n\nFeature<\/strong><\/strong><\/td>F405 V3<\/strong><\/strong><\/td>F405 V4<\/strong><\/strong><\/td><\/tr>USB Port<\/td> Micro-USB<\/td> USB-C<\/td><\/tr> Bluetooth<\/td> Basic<\/td> More stable and seamless pairing<\/td><\/tr> Blackbox Storage<\/td> 16MB\u2013128MB<\/td> 500MB onboard flash<\/td><\/tr> Barometer<\/td> No<\/td> Yes<\/td><\/tr> ESC Support<\/td> Up to 6S<\/td> Up to 8S (with 55A ESC stack)<\/td><\/tr> App Control<\/td> Yes<\/td> Improved compatibility & speed<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nThe V4 improves on nearly every aspect, especially in connectivity, logging, and stack performance.<\/p>\n\n\n\n
<\/span>How to Update SpeedyBee F405 V4<\/span><\/h2>\n\n\n\nKeeping your firmware up-to-date is important for bug fixes and new features. Here are two ways to update the F405 V4:<\/p>\n\n\n\n
<\/span>Method 1: Betaflight Configurator (Wired)<\/span><\/h3>\n\n\n\n\nConnect the board via USB-C to your computer<\/li>\n\n\n\n Open Betaflight Configurator and select the correct COM port<\/li>\n\n\n\n Go to the Firmware Flasher tab, choose STM32F405<\/li>\n\n\n\n Load the latest firmware and click \u201cFlash Firmware.\u201d<\/li>\n<\/ul>\n\n\n\n<\/span>Method 2: SpeedyBee App (Wireless)<\/span><\/h3>\n\n\n\n\nPower up your quad with a LiPo battery<\/li>\n\n\n\n Open the SpeedyBee App and connect via Bluetooth<\/li>\n\n\n\n Tap \u201cFC Firmware Update.\u201d<\/li>\n\n\n\n Select your board and firmware version<\/li>\n\n\n\n Start the wireless update<\/li>\n<\/ul>\n\n\n\n<\/span>Does SpeedyBee F405 V4 support bidirectional DShot?<\/span><\/h2>\n\n\n\nYes, the F405 V4 fully supports Bidirectional DShot, which is essential for enabling RPM filtering in Betaflight. This results in:<\/p>\n\n\n\n