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Mobula 7 binding issues + Betaflight issue
#1
Hey there,

Having some issues binding the Mobula 7 to a x9 Lite (I know is quite a common issue).

I can get the Mobula into bind mode using CLI but cannot successfully bind to my transmitter.  Im thinking I might have to switch to a different version firmware version  (my x9 lite is on 2.3.0 as of now) but unsure which version to use to support the SPI Rx.  
In Betaflight (another issue) under the configuration tab, I attempt to change receiver mode to "SPI RX Support" and SRP to "FRSKY_X", but when I save in the bottom right hand corner, I get a "Failed to close serial port" message at the top before it reboots, and the settings dont save, which I think is an issue as well.  What would cause this?  The majority of "fixed" forums with this topic seems like they changed these 2 settings which im unable to so that might help for starters.

Ill start with this info, and can provide much more.  The alternative to getting this to work would be getting a DSMX/DSM2 transmitter that could bind easier, and that would be my main transmitter for my mini quads, while using the X9 Lite for my main quads/woops.  So if someone can recommend a good transmitter that works with Spektrum/DSMX would be great as well.

Thanks in advance for any help!
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#2
Assuming you have a Mobula 7 with the built in FrSky SPI receiver, it uses ACCST 1.x.x FCC firmware on the receiver.

What version of the ISRM firmware do you have on your X9 Lite? If you have ISRM firmware version 2.x.x on it then that will be the reason why you can't bind. You will need to downgrade the ISRM firmware to version 1.x.x.
[-] The following 1 user Likes SnowLeopardFPV's post:
  • Bolognabrain
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#3
(11-Jan-2021, 11:14 PM)SnowLeopardFPV Wrote: Assuming you have a Mobula 7 with the built in FrSky SPI receiver, it uses ACCST 1.x.x FCC firmware on the receiver.

What version of the ISRM firmware do you have on your X9 Lite? If you have ISRM firmware version 2.x.x on it then that will be the reason why you can't bind. You will need to downgrade the ISRM firmware to version 1.x.x.

Running version 2.3.0.  I will downgrade to 1.x.x to see if that corrects it.  Thanks!
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#4
2.3.0 is the OpenTX version. I'm talking about the ISRM RF Module firmware for the internal RF module. The firmware for that is available from the following link. The latest version is 2.1.0 (which isn't compatible the Mobula 7) and the previous version is 1.1.3.

https://www.frsky-rc.com/taranis-x9-lite
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#5
(12-Jan-2021, 01:13 AM)SnowLeopardFPV Wrote: 2.3.0 is the OpenTX version. I'm talking about the ISRM RF Module firmware for the internal RF module. The firmware for that is available from the following link. The latest version is 2.1.0 (which isn't compatible the Mobula 7) and the previous version is 1.1.3.

https://www.frsky-rc.com/taranis-x9-lite
Makes sense, I checked and im on 2.1.0.
Thank you for the link
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