Bidirectional DShot

[heikobischoff]

Current Behavior

To use RPM filter, the ESC telemetry must be connected to the flight controller.

Desired Behavior

Most ESCs with BLHeli_32 and BLHeli_S are supporting bidirectional DShot. The ESC telemetry will be delivered to the flight controller by the motor wire.

Suggested Solution

Betaflight is supporting bidirectional DShot since version 4.0/4.1.
It would be great to implement/adapt this feature in iNav.

Who does this impact? Who is this for?

Mostly all multirotor builds which want to take advantage of RPM filter without wiring an additonal line from the ESC to the flight controller.

Additional context

Link to the Betaflight RPM Filter page:
https://github.com/betaflight/betaflight/wiki/Bidirectional-DSHOT-and-RPM-Filter

[denisiussion]

Any chance to have it on nearest release?

[harryjph]

I'm not able to work on this right now, but unless anyone else is working on this, I'm planning to tackle this next.

[DzikuVx]

Be our guest mate! pt., 23 kwi 2021, 18:48 użytkownik Harry Phillips ***@***.***> napisał:

…

I'm not able to work on this right now, but unless anyone else is working on this, I'm planning to tackle this next. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#5549 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAHMBG6PHPTNYYV3EAHQZCLTKGQHVANCNFSM4LV6V4IQ> .

[padcom]

Any plans (near or far) to implement it?

[harryjph]

@padcom I plan to do it, but it's quite complex and I don't understand the STM32's DMA architecture well enough at the moment. I've written an implementation for ESP32 so that I understand what goes on on the wire, I'm just fighting with DMA. Consider it a far plan, not a near one.

[AADDZZ]

@harry1453 Hi bro ! Any News about this feature ? Are you still working on it ?

Lot of people like me are waiting this to switch from Betaflight to Inav.

[RipperGOT]

Please, implement this option, it would be very useful. Even for esc like the Hobbywing rotor 60a blheli_32 which has no telemetry output.

Thanks guys!

[krizw]

Any news on this feature being added?

[r1000ru]

Since now the blheli s esc with bluejay firmware and the blheli32 esc have begun to give not only RPM, but also temperature via bidirection dshot, performing this issue would be very useful.

[Alex-TV]

There is a clone of the repository where this has already been done. Any chance to include it here?

[lida2003]

2023, still don't have bdshot supported yet?

There is a clone of the repository where this has already been done. Any chance to include it here?

[fritzrichter]

Hey guys, it's my first comment here. I just switched from Betaflight to iNav as especially as a beginner I love to have the position fix feature to pause or even land easily, quite nice and Betaflight guys seem not to want to invest into this as they "mainly focus on performance" - oh man. Anyway, the bdshot is something which seems you want to have and I was quite sad that this is not supported yet, quite old request though. Any update or plans? Quick question, as Betaflight has integrated it and it's open source as well, isn't it easy to get the underlaying idea from their source code? Why is it so hard to get the best out of these two worlds and let each other inspire a bit?

[danarrib]

Hey guys, (...) I just switched from Betaflight to iNav (...) Quick question, as Betaflight has integrated it and it's open source as well, isn't it easy to get the underlaying idea from their source code?

Check this out: https://github.com/iNavFlight/inav/wiki/INAV-for-BetaFlight-users