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Ouch! Good news but why don’t I see it as a trainer option in otx2.2.1? It really looks soldered in correctly. What I haven’t done is measure the vcc pad. No idea if it powers up or down when selected if it was to show up? Is it possible some other SMD components are missing not being the S main boa...

It’s been awhile since anything was posted here but I have a question Mike. If I want to use a HK Orange 616 receiver, postage stamp size with cppm out, to bind it one shorts the cppm pin to ground. To add a bind button and use it, I’ll also be shorting pin 2 heartbeat pin to ground. Would I want to...

I can’t ever thank you enough Mike for all you’ve contributed to the diy crowd since coming onboard! The educational part alone is priceless in my case!


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I’m putting the 4in1 on hold Mike now that I know what happened. This would be better time spent since it’s a question no one has answered to date on how well does the Frsky Bt module work in a Qx7, if added as a diy upgrade. Since I bought these 3ea ( I can send you my spare) as Horus upgrades, and...

Yes, I’ve been following your progress.
What do you do about the bind button? My thinking on a readymade internal knockoff, is to parallel the button and run this into the battery compartment?


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That Mike is a busy guy! Without you wanting a tx to talk and MikeB coming onboard early on, we’ed still be in the dark ages! The BT option was more to test Frsky’s than having it. My goal was trainer compatibility between the retail Frsky transmitters offering Bt. Most Frsky “appliance operator” RC...

Thank you for this info. I was hoping it was easier than that but even bad news is helpful for what’s going on. Sadly this Horus flashing isn’t going to happen as I don’t own or know of anyone that has a Horus. If I do find one, the soldering in and removing of the board isn’t going to be popular wi...

I haven’t been able to use/turn on, my addition of the Frsky version bluetooth module to my Qx7. The otx menu doesn’t offer a trainer Bluetooth option? I’ve installed it via a qx7s board picture and it should be correct. More going on then I’m aware of it seems. Here’s pictures of my spare Frsky Bt ...

From what I know, the power switch is more of a logic sw that supplies power to a circuit called “magic power switch” or something like that. The magic sw purpose is to actually control the time it takes to power on and off the main circuit boards tx battery voltage to a 5 or 3.3v regulator. This bu...

Have you been inside the case for any reason recently? Is so, please push on all the connectors. It’s possible that one may not be seated all the way.
This is easy to try.



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Family issues came up and I’ll be away most of the day. I’ll give this usb option a try first chance tonight. It would seem that if IRangeX shared the source code this would be a simple situation and we could move on. I’m accepting the fact that this may be taking more time than we should spend on i...

Bootloader question Mike. If the usb or flash from tx bootloader provided in the GitHub multiprotocol zip file were loaded, would they work. The videos out there show flashing this module (bootloader only) to activate the USB port option. They show using IDE but I do like the flash loader way better...

Not changing, changes every time I look at the menu.
0019 now.
Sw pos0, Multi, green led on.
Telemetry Frsky imp
Com1 invert none.
No numbers to the right of bind.


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Making more sense every time you post Mike. I’m not really dependent on the original and was more interested in the ppm mode for my pcm10 TAER tx as a test and learning module reprogramming. If I were to buy a new one or if you had a new one, could the code be extracted and used as a master? Would i...

I’m open to anything as it’s now a learning project.
From what you’re saying it seems like this the GitHub multi fw is not the one for this module but another one with a dial?




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weird? I'm posting the module docs that say dsmx-22 is pos 8, so something's different with this fw right off I missed? This HK R615x receiver can also do dsm2-22 and from your info that's position 7. Trying it no luck. I've got to stop for a few hours and it'll give you a rest. I'll review this aga...

LED action in my JRpcm10 PPM mode at power on Switch in pos0 the red led flashed about 5 times and then goes out and the green one light solid. This is where if working, holding in the button for 3 seconds at pos0, one can change the protocol selection mode from 0-15 to 16-3. Holding the button in d...

Wow, that’s great! So what’s going on is a mystery still? My pro tx battery went low 8.8v (nimh) so I’m charging it for awhile. That wasn’t the case when all the flashing and prior testing was going on. So to repeat myself again and why I’m frustrated, is when I received the module, I was able to ho...

Here's a start. I believe I've read my module with Flash Loader correctly. No complaints from it while doing it. I can't remember now if the loaded one had the ch order changed to TAER or was as a test, the original AETR? I'm also posting the _config.h file I want to use with the ch order TAER. I ad...

Will do as soon as the coffee kicks in. Can I assume that because the flash from the pro sd card worked after invert com set to yes, that your bootloader or some bootloader attempt, is loaded now? If so I can focus on why my fw flash attempts are not happening. Then redo it all once progress is made...

Thanks, I did that in the _config.h file before compiling the Multiprotocol.ino in the IDE pgm. My concern is that since no one else actually reprogramming this new 4in1 plus module that’s posted success, bootloader included, maybe something’s different? Is should be so easy I know. Install the stm3...

Changing to invert comm to yes flashed ok but... I can’t bind in pos 0 or seem to put the module in a ppm or serial mode via the rear button at turn on as it was designed to do. I may still have messed up the multi fw build? I’ll go thru the steps again. At lest this time I see the green led lite up...

Got closer? Using flash loader demo and selecting the .bin file option, I was able to see and load your latest boot fw. I was missing the selecting file type before, so simple now that I did it. I also verified that the lines were NOT commented out as suggested in the _config.h multi file. I then lo...

Ok, sleep didn't help. One more time ( I/we hope) how do I flash your latest M4in1.bin into the 4in1 module? I'm hoping if this works to just use the Pro tx for fw updating. Arduino.ide and notepad++ to edit and compile and export the file, the Pro to flash it. Your dual bootloader however would all...

I’m ready. To be sure, could you please provide the link and any instructions you think would help to avoid messing it up.
Couldn’t spend any time on it today, but will have in about 9hrs from now.
I’d like to try a multi fw flash from the 9xr pro.



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Thanks Mike.
I’m sure you’re help in streamlining this whole operation is going to be appreciated as more give this a try.



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Looking at the _comfig.h file in the Multiprotocol folder, with notepad++ I do see the reference to ppm as well as the dial position protocols. That I’m thinking should be good to go. I’m still going to try and download the fw I flashed from the module to look at it, but I think I’ll try a flash fro...

What’s going on is I have been using this module in my x9d plus and Qx7 and the latest multi otx 2.2fw. Same for my 9xr pro with ersky9x multi fw. No issues. Yes I can change the ch order in either tx to match the ch order I need to fly my umx Pitts without issues. Same for the HK orange module afte...

[attachment=0]Maple Com15 this is interesting? Yes, with the yellow know at 12:00 and the module in my 9xr pro v -pe3r221, I'm able to bind to a orange dsmx receiver, yea! However, I can't in opentx2.2 on my Qx7 that does bind if I use the serial only version of the 4in1, no yellow knob? I also can ...

Thanks guys for your help. Yes Mike a did load the maple drivers and when I plug in the usb I see Maple DFU show up in on my Windows lower right corner as loading. For now I’m open to using any means that lets me load a working multi fw again. Knowing I’ve only done fw damage and no actual hardware ...