Introduction
Hello, everyone!Have you ever looked confused in the face of the ESC negotiation options when assembling your love machine?What are DShot300, DShot600, and two-way DShot?Don't worry, today, in a professional but humorous way, I will take you to thoroughly understand the connotation of these agreements and make your drone fly more steadily and smarter!
Details
You know, the ESC protocol is the language in which the flight control (brain) issues instructions to the ESC (hands and feet).Its evolutionary history is simply a leap from "primitive shouting" to "WeChat chat"! Simulation protocol (outdated, but it doesn't hurt to understand) Representative: PWM, Oneshot, Multishot Meaning: Relying on the pulse width to transmit instructions is like a leader shouting at you: "Hurry up------!""(Turn quickly), "Slow!""(Turn slowly). Disadvantages: easy to be disturbed, manual calibration is required, high delay, and low accuracy. Conclusion: Don't choose! It's the digital age now!😉 Digital Protocol (DShot-the only true god now!） Connotation: Flight control directly sends digital data packets, just like sending WeChat: "The speed is set to 1856".Accurate and anti-interference! The data package contains： 油门 Throttle command (11 bits, 0-2047 precision)✅ return request bit (support two-way dialogue) CRC CRC check bit (error prevention, maximum anti-interference power!） Advantages: No calibration is required, low latency, strong anti-interference, and advanced functions are also supported! Conclusion: Choose DShot without a brain! The question is just which sub-version to choose~ 😎
DShot300 vs. DShot600: Is it a "provincial highway" or a "high-speed"?
Both of them are DShot, and there is only one core difference: communication rate (bandwidth).Features DShot300DShot600 connotation interpretation signal rate 300 kbit/s600 kbit/sDShot600 speed doubled!The delay performance is low, extremely low, and humans can hardly perceive the difference. The hardware requirements are lower and slightly higher, and the flight control and ESC performance are better. Applicable scenarios Entry/mid-level racing/ Huafei 600 is the favorite of the performance party. ️ Vivid metaphor： DShot300: Like a two-lane provincial highway-completely usable, smooth and stable! DShot600: Like a four-lane highway-lower latency and more responsive! 选择 Selection suggestion： If you are a novice or a budget party, DShot300 is definitely enough~ If your flight control ESC supports it, go directly to DShot600! If the motor is abnormal after turning on 600 (for example, it is difficult to start), return to 300 and try~ (It may be due to hardware compatibility issues)
Two-way DShot: the sublimation from "command" to "dialogue"!
This is the top priority of this article!It turns the protocol from a one-way instruction to a two-way intelligent dialogue! What is a two-way DShot? Traditional one-way: flight control is the "boss", only giving orders, regardless of the "life or death" of the ESC. Two-way DShot: The flight control is the "brain", and the ESC will reply: "The command has been received, what is the current speed, what is the body temperature, everything is normal, etc." What can you bring by turning it on? RPM filter (core function!） The electric adjustment is back to the actual motor speed, and the flight control generates a precise filter based on this to filter out vibration and noise! Effect: PID parameter adjustment is simpler, the flight is more stable, and the noise is less! (You can choose whether to turn it on according to the flight control's computing power resource test) ESC error telemetry The ESC will report errors in real time: over-temperature, over-current, desoldering... all are displayed in the OSD, and the machine will change color in seconds after the explosion!🕵️♂️ Automatic throttle calibration Say goodbye to manual calibration!The system is automatically done, super worry-free~ Do you want to open it?Answer: As long as your ESC supports (BLHeli_32/AM32 is basically supported), the flight control computing power is sufficient, and you choose F722, you must open it! Disadvantages? It just accounts for a loss of flight control computing power (modern F4/F7/H7 flight control ignores this overhead~). How to turn on (Betaflight as an example) Select any DShot protocol on the configuration page; turn on the two-way DSHOT switch directly below; make sure the debugging mode is turned on (it's that simple!😄） Hasn't your drone turned on two-way DShot yet?Go and check it out!After opening, come to the comment area to talk about your feelings~～
