[TowerTalk] RS-232 control of M2 Rotator

[TexasRF at aol.com]

Hi Codrut, do you know the send and receive data format for the M2  rotator?
 
73,
Gerald K5GW
 
 
In a message dated 9/27/2010 3:06:58 P.M. Central Daylight Time,  
yo3dmu at yahoo.com writes:

Hi,

You can try this  software:
http://www.qsl.net/yo3dmu/index_Page346.htm

73,  Codrut - YO3DMU

--- On Mon, 9/27/10, TexasRF at aol.com  <TexasRF at aol.com> wrote:


From: TexasRF at aol.com  <TexasRF at aol.com>
Subject: Re: [TowerTalk] RS-232 control of M2  Rotator
To: n6kj.kelly at gmail.com, guy_molinari at hotmail.com
Cc:  towertalk at contesting.com
Date: Monday, September 27, 2010, 2:39  PM


Would those unprintable characters perhaps be the data you are  looking 
for? 
Many devices like this return ascii values that require  further 
manipulation to  derive actual position data.

US  Digital encoders for example return three characters, first is device   
address, second is most significant byte and finally the least significant  
byte.  The address is discarded or used for verification, the ascii  value 
of 
the second  character is multiplied by 256 and added to the  ascii value of 
the third  character to give position data. That  number is further 
manipulated 
to allow for  the resolution of the  sending device.

I don't have first hand experience with the M2 unit so  all of this may 
well 
be irrelevant.

73,
Gerald  K5GW




In a message dated 9/27/2010 2:29:45 P.M. Central  Daylight Time,  
n6kj.kelly at gmail.com writes:

As I   mentioned in the original e-mail: this port was known to work
properly  with  other applications in the past.  I will double-check
when I  get home  to make sure that is still the case.

I am not using a  null modem  cable.  If I were, then I'd get no data
from the  rotator controller  rather than a response that appears to be
sent at  a different baud  rate.  Everytime I power cycle the  rotator
controller, it outputs data  that I can see in  hyperterm.
Unfortunately, the data is just a few  unprintable  characters; the kind
of thing I usually expect to see when the  port  configurations are not
correct.



On Mon, Sep 27, 2010  at  12:05 PM, Guy Molinari <guy_molinari at hotmail.com> 
 
wrote:
> Have  you verified that the port on the computer works  when connected  to
> another device?
>
> Also, another  problem is proper  cabling.    Are you using a "null  
modem"
> cable  (pins 2 and 3 reversed at each  end)?   Or is it a straight  
through
> cable (not  reversed).
>
>
>> Date: Mon,  27 Sep 2010 12:02:41  -0700
>> From: n6kj.kelly at gmail.com
>>  To:  guy_molinari at hotmail.com
>> CC:   towertalk at contesting.com
>> Subject: Re: [TowerTalk] RS-232  control  of M2 Rotator
>>
>> Yes, I'm aware of that. I  have hyperterm  set up for 8-N-1. I've
>> tried that combination  with nearly every  baud rate possible, but still
>>  nothing.
>>
>> On  Mon, Sep 27, 2010 at 11:49 AM, Guy  Molinari  
<guy_molinari at hotmail.com>
>>  wrote:
>>  >
>> > There are 3 parameters for  RS-232  communication.
>> >
>> > 1)   Baud  rate
>> > 2)  Parity bit (0 or 1)
>> >  3)  Number of stop bits  (0, 1 or 2).
>> >
>>  >  I believe the M2 rotator is expecting none for the parity bits (0)  
and  1
>> > stop bit.
>> >
>> >  73,
>>  > Guy, N7ZG
>> >
>> >>  Date: Mon, 27 Sep 2010  11:31:04 -0700
>> >> From:  n6kj.kelly at gmail.com
>>  >> To:  towertalk at contesting.com
>> >> Subject:  [TowerTalk]  RS-232 control of M2 Rotator
>> >>
>>  >>  I'm trying to remote my home station. The last piece of the   puzzle
>> >> for (non-QRO) operation is the rotator. I've  tried  several things to
>> >> get RS-232 control of my  M-Squared  rotator to work, but so far no
>> >> luck. The  rotator control  box seems to be trying to communicate. I'm
>>  >> using the  standard M-Squared control box. I see data coming  back 
from
>>  >> the rotator, but it appears to be the  wrong baud rate. I've  tried
>> >> every baud rate  (including the one that the manual  claims should 
work)
>>  >> so far with no luck. I've tried  controlling it with Hyperterm  and
>> >> with DX4WIN. Neither  works. This serial port  works fine for other
>> >> purposes.  This is a real  RS-232 port; not a USB-to-serial converter.
>>  >> Anyone  got any tips before I call M-Squared?
>> >>   _______________________________________________
>>   >>
>> >>
>> >>
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>>  >
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