Full duplex softserial-1 for Matek F411-WSE

[Target0815]

Current Behavior

Softserial-1 is currently only a TX.

Desired Behavior

Softserial-1 should be fullduplex RX/TX

Suggested Solution

Fullduplex Softwareserial-1 as this is also generated by default as a target for Matek F411-Wing. Only a small change is necessary:

So far:
#define USE_SOFTSERIAL1
#define SOFTSERIAL_1_TX_PIN PB9 // ST1 pad
#define SOFTSERIAL_1_RX_PIN PB9

New:
#define USE_SOFTSERIAL1
#define SOFTSERIAL_1_TX_PIN PB9 // ST1 pad
#define SOFTSERIAL_1_RX_PIN PB10 // LED pad

This would give us 2 full UARTS (GPS, CRSF) and 1 Softserial e.g. for the DJI FPV System (OSD).

Who does this impact? Who is this for?

All users with DJI FPV system on copters and plane. Or of course all users who need a 3rd serial port.

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[satsepp]

would be nice to Control camera device although.

Sepp

[fchansa]

Full ack!
For use of gps/crossfire/dji air unit it's neccessary to have a softserial with fullduplex RX/TX!

[gregm412]

Does anyone have a build with this enabled? I found one at https://fpv-community.de/threads/matek-f411-wse-softserial.85747/ but I'm unable to download.

[Target0815]

Download from this post: https://fpv-community.de/threads/matek-f411-wse-softserial.85747/post-1051752 (may be, that you have to be registered at the forum).

[Feldsalat]

Here: 2.5.1

[tobiasbischoff]

Please do it!

[dl1bg]

My F411WSE is also waiting to be used with GPS + Smartport + Caddx Vista. Would highly appreciate this feature!

[dl1bg]

@Feldsalat
Tested, works fine.
I do not have enough knowledge to make a pull request by my own. But if anyone does, I will be happy to test it, brew the coffee or spend a beer.

[alexvazquez]

Is this a new firmware that I can flash in INAV? I need to use my Caddx vista

[alexvazquez]

My F411WSE is also waiting to be used with GPS + Smartport + Caddx Vista. Would highly appreciate this feature!

Did you make it work? Appreciate it

[chr0mcom]

i need this for dji vtx

[dl1bg]

My EFX Racer plane works very nice with INAV; automatic flaps, RTH on failsafe and OSD is really usefull.
Unfortunately, there is no space for a bigger flight controller than the F411, so I can use this one or nothing.

UART1: GPS (RTH, speed measurement)
UART2: Receiver (FPORT in my case)
SOFTSERIAL1: DJI FPV system
I do not really think that someone would buy full color LED for the price of DJI OSD or ESC telemetry.

Still using the build from @Feldsalat, but it would be really kind if someone could spend the time to make a pull request. As stated above, I would be happy to brew him the coffee or spend a beer.

[alexvazquez]

My EFX Racer plane works very nice with INAV; automatic flaps, RTH on failsafe and OSD is really usefull.
Unfortunately, there is no space for a bigger flight controller than the F411, so I can use this one or nothing.

UART1: GPS (RTH, speed measurement)
UART2: Receiver (FPORT in my case)
SOFTSERIAL1: DJI FPV system
I do not really think that someone would buy full color LED for the price of DJI OSD or ESC telemetry.

Still using the build from @Feldsalat, but it would be really kind if someone could spend the time to make a pull request. As stated above, I would be happy to brew him the coffee or spend a beer.

Nice, basically same build I need, where did you connected the DJI FPV RX and TX? Led pin and what other?

[dl1bg]

@alexvazquez
RX from DJI (Caddx Vista in this case): ST1
RT from DJI (Caddx Vista in this case): LED

[alexvazquez]

@alexvazquez
RX from DJI (Caddx Vista in this case): ST1
RT from DJI (Caddx Vista in this case): LED

@dl1bg Does the firmware is available to flash via INAV or I have to download from someplace the HEX file? Appreciate it

[thedoble]

I would like this too! This board is great for small builds with gps/xfire/dji

[jstoeffler]

This seems fixed, isn’t it?

#6353

[alexvazquez]

Does anyone know where to get the firmware MATEKF411SE_FD_SFTSRL1 ? Appreciate so much

[alexvazquez]

This seems fixed, isn’t it?

#6353

Hi, did you get the HEX in order to test that OSD works on ST1 and LED pins?

Firmware 2.5.1 works great, based on the #6353 it was merged into master but I flashed firmware 2.6.1 and I can confirm that is not working. Only 2.5.1

[jstoeffler]

I've tried with the V3.0-rc1: https://github.com/iNavFlight/inav/releases/tag/3.0.0 – inav_3.0.0_MATEKF411SE_FD_SFTSRL1.hex

And I can confirm it works

[baddb1]

I've tried with the V3.0-rc1: https://github.com/iNavFlight/inav/releases/tag/3.0.0 – inav_3.0.0_MATEKF411SE_FD_SFTSRL1.hex

And I can confirm it works

I just flashed with V3.0. What pin is for Tx and what is Rx? Thanks

[jstoeffler]

I've tried with the V3.0-rc1: https://github.com/iNavFlight/inav/releases/tag/3.0.0 – inav_3.0.0_MATEKF411SE_FD_SFTSRL1.hex
And I can confirm it works

I just flashed with V3.0. What pin is for Tx and what is Rx? Thanks

@baddb1 If you read this thread you will find this information:

RX from DJI (Caddx Vista in this case): ST1
RT from DJI (Caddx Vista in this case): LED

[bnmoore]

Does this work for HDZero? I can't seem to get it to work.

[MrD-RC]

Does this work for HDZero? I can't seem to get it to work.

No, HDZero needs an actual UART, not SoftSerial.

[bnmoore]

Confirmed. HDZero worked on an actual UART. Is this a hard limit or just something that iNav or HDZero enforces due to performance?