openrcforums

Btw. interesting information from Pascal regarding V2 firmware: https://www.rcgroups.com/forums/showpost.php?p=43654839&postcount=8340 I said it many times, and I say it again, the MultiProtocol team and the DIY community in general should forget about the frsky protocol and create their own protoc...

If you do not want to build your own RX, Jumper R8 could be a good alternative to use alternative firmware. https://www.rcgroups.com/forums/showthread.php?3504875-Jumper-R8-Receiver-8-channel-PPM-16-channel-SBUS-D16-LBT-D8-compatible-firmware That Jumper RX, if it is the same as I have been followi...

Mike, here is the link. It runs on an ATMEGA328P. Same as the arduino. It can also use the one wire bootloader, so it is really easy to flash.. I built many. The RF module can still be bought from Banggood, and it seems to be reliable. The trickiest part is the Antenna switcher if you want to build ...

That is cool, thanks

João

How are you reading the card? With an adapter? I think some adapters might have a little tab that you can move to "write Protect" them? Please check if it is not the case..

João

I love Linux. Prefer it to windows for my music work, but I wish it was way easier to work with most of the times.
I use Ubuntu Studio by the way

João

No you wouldn't drive me crazy with questions :) The only difficult thing about building the rx is to solder the 48 pin processor in place, and also its resonator.. It is the same used on the multiprotocol module.. The other components, even if small, aren't that difficult to solder. But there is al...

I use the MultiProtocol module internally in all my radios, except one that has an old DHT module. if I depended on buying Frsky receivers, sooner or later I would have to get a new XJT module if they and their matching receivers couldn't be downgraded to old firmware. But I don't depend on them, th...

Thanks Michel..

João

Try this software to format them.. perhaps you get lucky

https://www.sdcard.org/downloads/formatter/

João

Bob, the new board should not need that mod, as the original 9xtreme reverse polarity protection problem, as well as other issues, have been fixed on this new board.

João

MikeB wrote: ↑

Fri Jan 17, 2020 12:08 am

I would expect the multi-protocol module to support D16 V2 quite soon. I already have some dumps of the protocol and I think I can see what is needed.

Mike

That is great Mike thanks

João

I think I might be able to use some components I have here, if they are pin and size compatible. For example the mosfets and other transistors. For the mosfet I normally use the AO3407A. According to the specs it should work. :) for the speaker I have a nice 3W /4 Ohm speaker for it, but need to fin...

Thank you Mike..

João

Well then you need to try either Kilrah's idea and the transistor inverter.
For the transistor circuit try something like 10K for R1 and 2.2K for R2.
The transistor itself can be any general use NPN transistor. For example BC546, BC547, 548, 549..

João

No, it is not a voltage problem. the rx outputs exactly the same voltage as the Taranis. I think you still didn't say what 35Mhz system that is. I still think it might be a polarity problem, but it could be also be that the receiver is not outputting any PPM signal. Are you sure you are not trying t...

solution If you power the receiver from its own supply, separate from the target transmitter, the you may invert the trainer signal from the Rx by connecting the ground from the Rx to the signal and the signal from the Rx to the ground of the target Tx to see if that works. Mike I didn't read this ...

The problem is not the voltage.. As far as I understand it is the signal polarity..

João

1 transistor inverter. Perhaps something like this??

If the radio PPM input has already a Pullup resistor on it's PPM input, you might be able to just leave R2 out. And the signal should now also be at the right voltage level..

João

The Taranis trainer output is 3.3V, so is the same as the receiver. Possibly, the receiver output is inverted compared to the Taranis. With erskyTx firmware on the Taranis, you have an option to invert the trainer output signal, maybe openTx can do the same, so you might be able to see if it only w...

Probably just the signal level being too low, the RX puts out a 3.3V signal but old 35MHz radios expected more like 9-12 (battery voltage). Well, doesn't the Taranis also output 3.3V level PPM? [emoji14] My guess is that the receiver inverts it, and that is probably causing the problem. But yes, 3....

Do you have bluetooth installed in your radio?

João

Thanks Mike..

João

Please download your models that give problems and post them here.. Or even better, the complete eeprom.

João

Mike, something like this? https://www.aliexpress.com/item/32952003293.html?spm=a2g0o.productlist.0.0.7688514eFFOfzO&algo_pvid=06205055-d774-4f76-b53e-2f09b98fa413&algo_expid=06205055-d774-4f76-b53e-2f09b98fa413-0&btsid=c60181df-4943-4544-9be9-915967927869&ws_ab_test=searchweb0_0,searchweb201602_10,...

Great that you've fixed it.. Congratulations..

João

Mike, it would be cool if it also worked with the same serial as the BT. But my question is, could the encoder be operated while trainer is also being used? Or telemetry data transfer over BT? Thanks @Rad, It would be way easier. you would need a cheap and small arduino board and a FTDI adapter to b...

Well, you will have to solder to the CPU pins, ouch :O :D But, I think Mike developed another simpler way to do it using i2c serial and a small arduino board. Mike please kick me if I am wrong :) But, if it is the case, there is one problem, do you have bluetooth? is it using COM 3? If that is the c...

Yes, but now we know that all connectors can be pulled out

João

See this video.. At around 15 minutes he shows the other side of the RF board. You must disconnect the connectors to remove it from the radio.
https://www.youtube.com/watch?v=zoE5oGDsgug

João