At 3/24/2005 06:54 AM, you wrote:
>Well, for things like this, I have built myself a serial snooper. Its
>basically a serial cable that has the output split so that you can plug it
>in as usual to whatever you are hooking together and then the 3rd port
>goes to another computer running Telix or some terminal. Then you can
>operate the device as usual and see the control commands come out in the
>terminal. After some playing around you can figure out their scheme and
>what you need to send it to do what. I have used this to figure out
>proprietary formats for lots of things and it works well. Most reecently
>there was a telephone call box that used a computer with the companys own
>software to control it. I wanted to control it with a PIC instead of a PC
>so I asked the company for their commands and formats etc. which they
>would not give. So, I snooped and in less than a day I had thrown their
>software in the trash and my PIC was working great. If I were you I would
>snoop on Doug Halls two serial lines going into the Kenwood radio. I am
>sure you can figure out what you need to send that way. Sounds like a
>great problem, if I had one of those radios I would try it myself. Hope
>this helps.
>
Only problem is I don't think the controller-to-RBI communications is a
regular serial protocol. I don't know much about it (though I'm about to -
just ordered some synthesizers for a project at work that use it). I
believe it's SPI, using 3 lines to transfer data (data, clock &
ground). In that case you wouldn't be able to read it using a standard
serial port. Sounds like you'd need some sort of logic analyzer. One
possibility might be to use a PC's parallel port & some VB programming to
sample & record the data line on every clock pulse.
Regarding use of remote bases as alternate inputs: I just hope you choose
your frequencies well. I've lost track of how many times a 147.435
"remote" camped on or near an input or link frequency to my system,
effectively shutting it down.
Bob NO6B
>Larry Rowe, N8RDT
>[EMAIL PROTECTED] wrote:
>
>To overcome Jack Gerritsen and his constant jamming of our repeater I
>have placed two Kenwood radios on the hill. I interrupted my main UHF
>repeaters receiver to the controller with a C.A.T. RLS-1000 3 port
>mixer and placed the Kenwood radios on the other two ports. The
>Kenwood radios (TM-241 144MHz and TM-331 220MHz) are each splitting
>their discriminator audio out of the mic connectors on the radios into
>both a TP-3200 Tone panel and a RCL-MOT squelch module. The audio from
>the RLC-MOT feeds the RLS-1000 mixer and all works very well. The
>repeater users know that when Jack starts in with his [EMAIL PROTECTED] I can
>send a close command to the RLS-1000 to mute the audio coming from
>the UHF port and Jack is gone.
>
>Jack has been quit frustrated and so he scans around the bands now
>looking for our users on the inputs and finds them and starts back in
>on them again. Once the Kenwood radios have been compromised I have to
>make another trip to the hill and change the Kenwood radio
>frequencies. I want to do this remotely and I don't want to have to
>buy another Doug Hall RBI-1.
>
>I think I can use a serial output from my controller (a Linkcomm
>RLC-3) to a basic stamp and making the controller think it is
>commanding a RBI-1. My problem is that I don't know anything about how
>to communicate to the Kenwood radios. Obviously Doug Hall figured it
>out but he does not want to share this info with me. I don't blame him
>as he would rather sell me another RBI-1 and I don't have the patents
>or the equipment to try and decrypt the stream that he is sending from
>the RBI-1 to the radios. The folks from C.A.T. also figured it out and
>tried to put it into their CAT-700 repeater controller but found a big
>conflict with their implementation so the had to abandon it. They
>don't want to share any detail either.
>
>Has anyone out here got the answers I am looking for? I have learned
>that the Kenwood radio is a typical single band radio with the mic
>plugged into it and it works accordingly but when the Kenwood RC-10 or
>RC-20 was plugged in the mic connector it supplied a voltage to pin 6
>of the mic connector changing the function of the up/down pins in the
>mic connector to serial in/out. I need to know what baud rate I need
>to send the radio data. I need to know the format that the radio is
>expecting. I need to know the parameters that the radio is expecting.
>
>I believe that someone out here has experimented with this
>functionality it is way too cool.
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