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 Robotics / RCX / 2243
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Subject: 
 Re: IR Sensitivity - Was: 1.5/2.0 infrared problem
Newsgroups: 
 lugnet.robotics.rcx, lugnet.robotics.rcx.legos, lugnet.robotics.spybotics
Date: 
 Tue, 4 Nov 2003 00:02:54 GMT
Viewed: 
 12124 times
  
In lugnet.robotics.rcx, Mark Riley wrote:
> So, here's a brief summary of the Spybot remote packets (AFAIK):
> 
> Operating Mode
> 
> 01CCRRRR LLLLSSSS Motor drive buttons (repeats when buttons held down)
> 10010CCC 0010SSSS Fire button (once when button pressed)
> 00CC0001 0001SSSS Fire button (repeats when button held down)
> 
> Setup Mode
> 
> 10010CCC 1111SSSS Channel assignment (lower right button)
> 
> Ping Mode
> 
> 10010CCC 0000SSSS Ping (repeats continuously)
> 10010CCC 0001SSSS Upper left button (once when button pressed)
> 10010CCC 0010SSSS Fire button (once when button pressed)
> 10010CCC 0011SSSS Upper right button (once when button pressed)
> 10010CCC 0100SSSS Lower left button (once when button pressed)
> 10010CCC 0101SSSS Lower right button (once when button pressed)
> 
> Legend
> 
>     CC = Channel number (1 to 3)
>    CCC = Channel number (1 to 6)
>   SSSS = Checksum (chosen so sum of all nibbles is zero)
>   RRRR = Right motor buttons
>            0000 - No button pressed
>            0111 - Foward pressed
>            1111 - Reverse pressed
>   LLLL = Left motor buttons
>            0000 - No button pressed
>            0111 - Foward pressed
>            1111 - Reverse pressed

Thanks a lot for posting this very useful information, Mark!  I don't know how
long I've been beating my head against the brick trying to make heads or tails
out of the values I calculated for the various possible combinations of button
presses.  The Spybot remotes can also transmit on channel zero, I believe.
Also, it seems to me that it would be better to document the Spybot remote by
button number rather than RRRR/LLLL either forward or reverse.

Here's the table of hex numbers I've been using:

              CHANNEL
Btn     0      1      2      3
1    0x4075 0x5074 0x6073 0x7072
2    0x9025 0x9124 0x9223 0x9322
3    0x4705 0x5704 0x6703 0x7702
4    0x40fd 0x50fc 0x60fb 0x70fa
5    0x5f0d 0x5f0c 0x6f0b 0x7f0a
3/4  0x47f6 0x57f5 0x67f4 0x77f3
1/5  0x4f76 0x5f75 0x6f74 0x7f73
1/3  0x477e 0x577d 0x677c 0x777b
4/5  0x4ffe 0x5ffd 0x6ffc 0x7ffb

Probably not very helpful.  On second thought, maybe it's better to not think
about button numbers. :-)  How on earth did you figure this all out?

John Hansen



Message has 1 Reply:
  Re: IR Sensitivity - Was: 1.5/2.0 infrared problem
 
(...) [snippage] (...) [more snippage] (...) Glad you like the chart. Trying to find a way to present the information in a useful manner was the trick for me, too. :-) I'll have to throw up a web page or something. As to figuring it out, credit has (...) (21 years ago, 4-Nov-03, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos, lugnet.robotics.spybotics)

Message is in Reply To:
  Re: IR Sensitivity - Was: 1.5/2.0 infrared problem
 
(...) You're welcome! (...) Well, I did try it out and it does work... somewhat. For example, when you set the channel to 5 using the technique mentioned above, only some of the remote packets reflect 5 as the channel number, while others still (...) (21 years ago, 3-Nov-03, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos, lugnet.robotics.spybotics)

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