I wanted to start with FPV, so after careful consideration I purchased a trio of - Transmitter: Jumper T12, Goggles: EV800D & Drone: Eachine Qx 65 (DSM2/DSMX) receiver version.

What follows is a Mini-HOWTO, followed by me stuck at the Last (?) binding Step.

Background

The instructions with the Qx 65 Drone were barely helpful https://www.eachine.com/downfile.html?path=/eachine/20180411//5acda4cccac02-QX65%20DSMX%20manual.pdf .
Nevertheless, I was able to make some progress by following them and this YouTube Video.

Steps Taken:

Beta Flight Connection:
1) Unlike the Video the Drone doesn't have a physical bind button. So I had to connect it via Beta Flight to send in commands to start the Radio Binding process.
2) Beta Flight would just not connect. Turns out I had to have the right USB cable! to connect.
3) Beta Flight needs 3 drivers to be installed (Zadig and 2 more) before it is detected. This video and this video (For Windows) and a couple of related ones helped.
4) I was able to get Beta Flight connected to the Drone and the CLI started showing up.

CLI instructions to start binding mode
Based on other posts online, I used the following CLI commands to set the Drone into the Radio Binding mode after connecting it to Beta Flight.

set spektrum_sat_bind=5
save

While the drone would go into Radio Binding mode (white lights flashing continuously) and then stop flashing indicating a bind. The binding with the Jumper T12 Transmitter just wouldn't click, and the transmitter commands were not being received by the drone/Rx.

I also tried setting the following value, but that made no difference -

set spektrum_sat_bind_autoreset=OFF

When it once appeared that the white lights had stopped flashing. I also piped in the CLI commands to disable binding mode via the following -

set spektrum_sat_bind=0
save

And tried using the transmitter but the drone would not take any commands.
Connecting the EV800D Goggles with the Micro-USB unplugged and the Batteries connected showed "DISARMED" in the OSD (On-Screen Display).
So I tried to set up an Arm switch (Ch. 5), but that didn't seem to help either.

Jumper T12 Transmitter Setup
In order to set up the transmitter, I did the following -
1) Created a new model with the Radio set up as following -

External RF:
Mode: MULT DSM
Subtype 2 11ms
Status V1.2.0.0
Ch. Range CH1-8
RxNum 1
Autodetect On

I also tried a couple of other options including DSM-X at both 11ms & 22ms Frame rates, as well as DSM-2 at 22ms and it didn't look like they worked.
In order to use DSMX I had made sure to use the Beta Flight CLI to pass the right 'sat' commands as well. i.e. set spektrum_sat_bind=9

Additionally in the configuration I set the Serial Receiver Provider to SPEKTRUM1024 as per this guide.
And changed it to SPEKTRUM2048 when trying out DSMX modes.

But none of this seems to be helping.

Prior Posts
I also searched online to see, if anyone had successfully solved this.
And it appeared that user Bigdz had made a post about this exact issue back in 2018 -
https://www.rcgroups.com/forums/show...&postcount=415 but the post is now archived and PMs to user Bigdz didn't get any replies. The YouTube video that was posted in the forum post has been deleted too.


Problem

I have the Qx65 connected to my Betaflight on my computer and I can issue CLI commands to put it in bind mode, but my Jumper T12 just does not bind even after trying a bunch of (DSM2 / DSMX) protocols.

I've tried both External RF modes (1) MULT DSM & (2) DSM2 DSM2/DSMX and they both don't seem to be binding. The white flashing lights stop but nothing happens afterwards when I connect to BetaFlight.

The receiver tabs show some initial movement, but don't show any movement regardless of how much I move the sticks.
Some times it shows any movement on the Throttle as a partial movement in the Roll/Pitch axis.

At one point, it seemed like the drone did respond to a command from the transmitter, but it got stuck and the throttle wouldn't respond. It seemed like the Throttle was acting as a the Roll up to half its travel and as something else above the center-stick position.
Once I disconnected and tried to re-connect the drone I was back to the binding issue.

Any help will be greatly appreciated.
Thanks

Try 9 instead of 5 in the bind command, and you have to adjust the channel mapping in Betaflight get it to work properly.

Thanks for the reply, Serge. I assume with the 9 in the CLI Bind command, I should also (1) Update the Beta Flight configuration to set the Serial Receiver Provider to SPEKTRUM2048
and (2) Update the Tx protocol to DSMX i.e.

Internal RF:
Mode     OFF
External RF:
Mode: MULT DSM
Subtype X 22ms
Status V1.2.0.0
Ch. Range CH1-12
RxNum 1
Autodetect On

Regarding the Channel mapping thanks for the tip, I've found this Guide from Oscar Liang that looks promising.

Will post back with the results, when I'm off work.

Sorry i cant be of too much help with your bind problem, but i am curious why you chose a brushed QX65 as your first quad, specifically DSMX when that has such a painful bind process compared to Frsky and Flysky, which the T12 also supports.

You certainly jumped into the deep end with complexity for your first experience :-/

I see the issue, I have this EXACT setup. On the T12, choose internal RF. Don't choose external unless your antenna comes out of the rear removable module. Bind as DSMX 11ms, it will automatically downgrade to 22ms I think. Use the spektrum_sat_bind = 9 command, save, reboot, unplug, replug, bind using the T12, after bind, check receiver tab ( first configuration needs to serial RX and spek 2048) for inputs. Set to AETR or TAER depending on the radio setup. Then finally, go to cli and type spektrum_sat_bind = 0, save, unplug and that's it.

Originally Posted by Tokyo_Dom

Sorry i cant be of too much help with your bind problem, but i am curious why you chose a brushed QX65 as your first quad, specifically DSMX when that has such a painful bind process compared to Frsky and Flysky, which the T12 also supports.

You certainly jumped into the deep end with complexity for your first experience :-/

Dude, stop. Brushed whoops rule, they are actually really good for first time pilots . Have you used spektrum? It's actually a little easier (no failsafe setup, no telemetry setup, no receiver id's).

Originally Posted by BrandonB

Dude, stop. Brushed whoops rule, they are actually really good for first time pilots . Have you used spektrum? It's actually a little easier (no failsafe setup, no telemetry setup, no receiver id's).

I have only used it on the Inductrix FPV+. That did binding automatically though so i didnt have to deal with cryptic commands through my PC. I much prefer being able to bind with a button.

And as for brushed, not knocking it, i still mainly fly brushed (NFE 716). I was just curious because the OP said he made the choice after careful consideration. Yet the QX65 is still $60 or so, and is far from the best brushed choice. For $20 more he could have had a Mob6 or NBD hummingbird brushless, for $15 less he could have gotten a Beta65s Lite, or NBD Hummingbird brushed.

I wasnt trying to mock him, It will be fine to learn on, but was just curious why he chose it now, considering I agree fully with his goggle and transmitter choices. I do like hearing other opinions to my own, especially if they challenge me to change my thinking. Right now i steer clear of DSMX because of the weird bind process and no discernable benefits (i never did failsafe setup or telemetry setup or receiver IDs on my other whoops)

Originally Posted by Serge Roth

Try 9 instead of 5 in the bind command, and you have to adjust the channel mapping in Betaflight get it to work properly.

Serge, I tried both 9 & 5 with DSM2 & DSMX Protocols and it did not bind.

Originally Posted by BrandonB

I see the issue, I have this EXACT setup. On the T12, choose internal RF. Don't choose external unless your antenna comes out of the rear removable module. Bind as DSMX 11ms, it will automatically downgrade to 22ms I think. Use the spektrum_sat_bind = 9 command, save, reboot, unplug, replug, bind using the T12, after bind, check receiver tab ( first configuration needs to serial RX and spek 2048) for inputs. Set to AETR or TAER depending on the radio setup. Then finally, go to cli and type spektrum_sat_bind = 0, save, unplug and that's it.

Brandon,

Thanks for the help. But Alas!

My Jumper T12 does have the external antenna i.e. it has the JP-4-in-1 module.
The Internal RF does not bring up DSM2/DSMX or MULT as Options.

I tried following the exact steps you stated, and it still wouldn't bind. The white lights kept flashing regardless of what I tried with the Tx & on Beta Flight.

I also tried the following to see if they help -
1) Tried binding with Tx far away from the Drone.
2) Tried binding while
(a) Drone was connected to MicroUSB but not connected to Beta Flight also tried while
(b) Drone was connected to a battery
3) Tried setting the Receiver configuration values - SERIAL , SPEKTRUM2048, and doing a "Save & Reboot" before setting the CLI bind commands.
4) Tried both the DSM2/DSMX options that show up in Jumper T12 Tx within the top-level menu in External RF and also the type MULT with Sub-type of DSM - 2/X & 11ms/22ms

So far no luck.
Thanks for your suggestions, perhaps I just go unlucky with this drone.

Originally Posted by Tokyo_Dom

I have only used it on the Inductrix FPV+. That did binding automatically though so i didnt have to deal with cryptic commands through my PC. I much prefer being able to bind with a button.

And as for brushed, not knocking it, i still mainly fly brushed (NFE 716). I was just curious because the OP said he made the choice after careful consideration. Yet the QX65 is still $60 or so, and is far from the best brushed choice. For $20 more he could have had a Mob6 or NBD hummingbird brushless, for $15 less he could have gotten a Beta65s Lite, or NBD Hummingbird brushed.

I wasnt trying to mock him, It will be fine to learn on, but was just curious why he chose it now, considering I agree fully with his goggle and transmitter choices. I do like hearing other opinions to my own, especially if they challenge me to change my thinking. Right now i steer clear of DSMX because of the weird bind process and no discernable benefits (i never did failsafe setup or telemetry setup or receiver IDs on my other whoops)

Tokyo_Dom,
My "careful consideration" was just watching a few YouTube videos and searching online for the cheapest equipment.
Also I chose the DSMX because I had used the receiver in a non-FPV RC plane (E-Flite convergence) and the Jumper T12 bound quite easily with it.

What would you recommend I buy as a beginner FPV. I'm hoping not to spend too much money, given my poor luck and since I'm just starting out.
Is this a drone you'd recommend -
https://www.banggood.com/Only-20g-Ha...r_warehouse=CN

Yeah that is considered one of the best value micros right now. Flies great, plenty of power etc. Not sure for a beginner though. Until now I had recommended the Betafpv Beta65s Lite but I see a couple of people really struggle with it as it has fairly aggressive angle mode performance. The newbeedrone brushed quads are cheap now, and you have local support so maybe I'd say that's a better choice now.

Btw careful consideration and then just looking for the cheapest option sounds like me.

It's not the end of the world though, the qx65 was popular for a bit. hopefully you can get it bound soon so you can start enjoying oy

Originally Posted by nausher

Brandon,

Thanks for the help. But Alas!

My Jumper T12 does have the external antenna i.e. it has the JP-4-in-1 module.
The Internal RF does not bring up DSM2/DSMX or MULT as Options.

I tried following the exact steps you stated, and it still wouldn't bind. The white lights kept flashing regardless of what I tried with the Tx & on Beta Flight.

I also tried the following to see if they help -
1) Tried binding with Tx far away from the Drone.
2) Tried binding while
(a) Drone was connected to MicroUSB but not connected to Beta Flight also tried while
(b) Drone was connected to a battery
3) Tried setting the Receiver configuration values - SERIAL , SPEKTRUM2048, and doing a "Save & Reboot" before setting the CLI bind commands.
4) Tried both the DSM2/DSMX options that show up in Jumper T12 Tx within the top-level menu in External RF and also the type MULT with Sub-type of DSM - 2/X & 11ms/22ms

So far no luck.
Thanks for your suggestions, perhaps I just go unlucky with this drone.

Take a look at the model name on the board and make sure its the DSM model. It will say Beecore v (something) then the protocol. I'm starting to be suspicious.
Also, I have had wifi interfere with binding before. My fix is to move to a different room or spot. Seriously.

Originally Posted by BrandonB

Take a look at the model name on the board and make sure its the DSM model. It will say Beecore v (something) then the protocol. I'm starting to be suspicious.
Also, I have had wifi interfere with binding before. My fix is to move to a different room or spot. Seriously.

I checked the board and it does say DSMX on it. I'll try binding in FrSky mode & FlySky mode just to be sure.
Good point regarding Wi-Fi signal interference will try in a different room or perhaps on the patio.

Though, I am also pretty close to the fires in the area, so I may have to (hoping not) evacuate in which case the troubleshooting may have to wait a bit.

Thanks for all your suggestions Brandon, they've been very helpful.

Originally Posted by Tokyo_Dom

Yeah that is considered one of the best value micros right now. Flies great, plenty of power etc. Not sure for a beginner though. Until now I had recommended the Betafpv Beta65s Lite but I see a couple of people really struggle with it as it has fairly aggressive angle mode performance. The newbeedrone brushed quads are cheap now, and you have local support so maybe I'd say that's a better choice now.

Btw careful consideration and then just looking for the cheapest option sounds like me.

It's not the end of the world though, the qx65 was popular for a bit. hopefully you can get it bound soon so you can start enjoying oy

Tokyo Dom,
I'm trying to purchase an FPV, since I returned the other one. What would you recommend between the 2 you suggested for a beginner with basic quad flying skills. I'm looking at the following 2 items to choose from -
(1)
Happymodel Mobula6 - https://www.getfpv.com/happymodel-mo...one-frsky.html
(2)
NewBeeDrone Hummingbird F4 - https://newbeedrone.com/products/hum...-brushless-bnf

Also for binding with the Jumper T12, would FrSky or the FlySky receiver be easier to bind with?

Originally Posted by nausher

Tokyo Dom,
I'm trying to purchase an FPV, since I returned the other one. What would you recommend between the 2 you suggested for a beginner with basic quad flying skills. I'm looking at the following 2 items to choose from -
(1)
Happymodel Mobula6 - https://www.getfpv.com/happymodel-mo...one-frsky.html
(2)
NewBeeDrone Hummingbird F4 - https://newbeedrone.com/products/hum...-brushless-bnf

Also for binding with the Jumper T12, would FrSky or the FlySky receiver be easier to bind with?

If I were you, I'd get the new hummingbird f4. Newbeedrone is very good with support... Any problems and you'll be able to get them on the phone to help. Frsky is easy to bind with the T12, I've never done flysky.