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Mechcondrid wrote:

pmackenzie wrote: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

Dear guys,
dont you have any picture of DM8 wiring in the removable module? If I understand, I need only to add the 3,3 stabiliser? Thanks a lot!! Ondrej

You don't need any compenent for a DM8. Simply wire the +, - and PPM.
You'll easily find Futaba and JR module pinouts on the web to see what to connect where.

Hello all together
Should we try to use the TX-Modul that "hammer22" on RCgroups is using to built his own.
http://www.rcgroups.com/forums/showthread.php?t=1669239
voila 12 Channels DSM2 and DSMX .
The Module hammer22 has made uses PPM and convert it to serial.
For 9x Users it would be better to use direkt serial.(binding, model match,DSM2/DSMX select via Software)
Eventually would erazz PM to hammer22 an talk a little bit about serial control of this tx Board, to get the best out of it
Cheers Werner

My thoughts - the main reason IMO for using DSM2 is for the BNF planes.
And none of them need more than 6 channels, so a DX4e module is the best solution in this case.

Electric helis are fine with 6 channels, and so are most aerobatic planes.

If you want better RF link than the stock FlySky, then FrSky is likely a better option. DSMx receivers are quite expensive.

If you really need 12 channels then you are possibly doing FPV? And in that case UHF is better I think.

Pat MacKenzie

Can anyone confirm the AMTX11 module will work on 8 channels with following pulses.cpp modification:

// DSM2 protocol pulled from th9x - Thanks thus!!!

//http://www.rclineforum.de/forum/board49 ... ost3897736
//(dsm2( LP4DSM aus den RTF ( Ready To Fly ) Sendern von Spektrum.
//http://www.rcgroups.com/forums/showpost ... tcount=237
// /home/thus/txt/flieger/PPMtoDSM.c
/*
125000 Baud 8n1 _ xxxx xxxx - ---
#define DSM2_CHANNELS 8 // Max number of DSM2 Channels transmitted
#define DSM2_BIT (8*2)
bind:
DSM2_Header = 0x80,0
static byte DSM2_Channel[DSM2_CHANNELS*2] = {
ch
0x00,0xAA, 0 0aa
0x05,0xFF, 1 1ff
0x09,0xFF, 2 1ff
0x0D,0xFF, 3 1ff
0x13,0x54, 4 354
0x14,0xAA 5 0aa
0x19,0xAA 6 0aa
0x1d,0xAA 7 0aa
};

AFAIK the DX4/5/6 modules will not take anything beyond CH6.

Back when we were working on this I tried various things to get more than 6 channels, nothing ever worked.

Pat MacKenzie

pmackenzie wrote:Back when we were working on this I tried various things to get more than 6 channels, nothing ever worked.

Pat MacKenzie

That`s sad...