DSM2 work

[sporez]

Yes. I have mine configured like this.

There is a dirty way (like mine) and a clean way.

Dirty way is to wire it all in and have both modules transmit at once.

Clean way is to install a switch to allow you to choose a module. At a minimum this is a spdt switch to move the PPM stream from one module to another.

Awesome! So do you have two separate antennas for each tx? If so, don't they interfere?

[Rob Thomson]

I have two separate antennas.

External is frsky long range
Internal is dsm2 park fly. (it goes more than far enough through the plastic of the case)

[Kiro]

With the AMTX11 Modul, how many channels are useable ? Is it possible to use a 9 Channel Receiver with all channels ?

[cre8tiveleo]

6, only six channels. Unless it's from a dx7, i haven't seen what is inside a dx7

Ar9000 does funky things. Ar8000 is okay, but only 6 channels. Ar6000 series all work flawlessly.

[pmackenzie]

I tried several ways to get more than 6 channels with the DX4e module, but nothing worked.

11msec works fine with the AR8000, both in DSM2 and DSMX mode. MCPx also worked fine in 11msec mode.
Ar61xx don't work at 11msec because they output the servo signals sequentially. 11msec is just not enough time to get them all out before the next set is ready.

I tried something mentioned on RCG, putting out alternating data sets with different model match numbers every 11 msec. If it worked you would be able to do 12 channels by using two recievers
I was sending ch1-6 in one data stream with the base model match code, and then channels 11-16 along with a different model match code 11 msec later.
There were 4 different modes, 11 msec, 22msec, hip hop and model2. The last mode was there so you could bind the second receiver with the offset model match.
Had all the menus worked out, checked the data streams and everything looked good, but it was all a waste of time

The poster on RCG said it worked, but I could not get it to work at all. As soon as I switched to the "hip hop" mode the receivers lost connection. Tried in DSM2, DSMX, different receivers, nothing.
The only thing that I could see was that he was using the HK "orange" receivers. perhaps there is something about them that is different?

I will post the modified files that allows 11/22 msec selection a bit later.

Pat MacKenzie

[Mechcondrid]

hey just got my hands on a dm8 module and inside it looks like the standard hp module pinout the only difference is that the module model number is x1txn
if you want to try for 8 or 9 channels send me the code and i'll try hooking this one up

[pmackenzie]

Pretty sure the DM8 module is expecting to see regular PPM signals as the input.

Somewhere online I found a site where they opened up one of the Spektrum modules and there was an added processor inside to do the PPM to "whatever" the RF portion required.
The only external components were for the 3.3 volt regulator circuit.

So try it first in PPM and DSM modes to see which, if any, works at all.


Pat MacKenzie

[cre8tiveleo]

I've the c1 in mine. Amtx10 even. The dx4e comes with amtx11 B revision i do believe.

It will work. Yours may have the firmware to do 8channels.




---
I am here: http://maps.google.com/maps?ll=44.003067,-79.457256

[Mechcondrid]

Pretty sure the DM8 module is expecting to see regular PPM signals as the input.

Somewhere online I found a site where they opened up one of the Spektrum modules and there was an added processor inside to do the PPM to "whatever" the RF portion required.
The only external components were for the 3.3 volt regulator circuit.

So try it first in PPM and DSM modes to see which, if any, works at all.


Pat MacKenzie

ya theres a microcontroller on another pcb board where it grabs power and the ppm i took the rf module off that board

[uphiearl]

Can someone post a diagram on how to hook up the Spektrum DX4e DSMX 4 Channel Transmitter Mode 2 SPMR4400 in an old snap in rear case for the er9x ? Do you need an atmel chip and programming also to decode PPM signals and make the DSM2 serial data or does the er9x gen the signal the DX4e module wants?
Thanks, Earl

[pmackenzie]

ER9X generates the serial data, no ATMEL chip required.
Here is the schematic

You could substitute a 3,3 Ubec for the linear regulator.
:
http://www.hobbyking.com/hobbyking/stor ... _23v_.html

Pat MacKenzie

[cre8tiveleo]

viewtopic.php?f=26&t=163

So much info on this forum on this topic.

Guess i'd better do that how to index sooner than later...

[uphiearl]

Thanks Pat. I have lots of 1A 3.3v regs laying around. Now waiting for 4e from ebay.
Earl

[uphiearl]

Is there a special compile for the DSM2 for the er9x ? Got a DX4e coming from ebay.
Earl

[cre8tiveleo]

Just use er9x, no special compile.
You set the protocol on the model menu. And away you go.

[uphiearl]

Great. I just got a dsm quad today. the Blade mQX. The TX that comes with it is such a TOY. Can't wait to get the 4i to rob the module.
Also, is there enough oomph in the er9x 3.3v regulator to run the 4i tx module. If so then we just need the diode and one resistor. I have a broken FlySky module case I am gonna use.
A SPDT switch would choose the 3.3v or the normal volts for the module pin.
Earl

[cre8tiveleo]

It's been said, many times, many ways... with a high power module, you will have brownouts if you don't use a separate power source. with a lp module, you can drive it off the tx power. (as in the lp module in the toy tx you have.) (you can use the dsm tx module from the blade controller too, for all indoor stuff, it will still give you six channels.)

[uphiearl]

I will open the TOY controller and see what kind of module it has..I'll take pics also.
Earl

[cre8tiveleo]

[uphiearl]

Man is the tx module SMALL. It is an X1OEMTX printed on board. I thought it would be bigger. Only 3 pins on it. + - and signal ? Oh, and ufl antenna connector with antenna.
Darn, gotta charge Rebel camera battery ! Then I gotta see how to upload pics to here.
Earl

[cre8tiveleo]

That's the one mostly used.

[uphiearl]

Is it 6 ch ?
Earl

[Rob Thomson]

Yes!!!

[uphiearl]

cool !!! Can't wait to solder it into the er9x....Do you need to switch the +3.3v line or the sig line or both if I put the module inside the er9x ?
Earl

[Rob Thomson]

I personally do not.

I simply leave both modules connected and it works simply by changing the protocol.

Good practice would say that one should however put on a switch. I have not simply because my long term aim is to put in a software style switch so that I don't need to mess with my putting a hole in my case!

Antenna wise.. I have taken the antenna that comes with the unit out the black plastic; and simply secured it inside the transmitters case with some hot glue. It seems to work well - and with the park fly models I use with DSM2; range is not an issue!

[uphiearl]

I wonder if there is a command to put the tx module in the standby mode or something. Then we would not have to worry about a switch. The only thing I worry about with both hooked up is transmitting 2 independent 2.4g signals. Of course only one is bound to the aircraft or heli at a time I guess.
Earl

[KayCee_V4]

Does anyone know if the rf module from a Dx6i will work with the 9X

Regards,
KayCee

[cre8tiveleo]

Yes, its been done as well.

[cre8tiveleo]

here is the dx6i module.. and the pin outs to make it work.

[Mechcondrid]

ok i dont know why but revision B of the hp modules do NOT work for this mod!
the module i got from a DM8 futaba module doesnt bind at all
the ppm gets to the module and power goes through it but no RF signal is generated (or at least no binding rf signal)
can anyone else confirm this if they have a dm8 or similar module? if not i might have bought a dud module