1802Re: [tracker2] T2-135 lessons being learned
- Jun 4, 2007Well it would seem that there is something wrong with the "GPS"
serial port that is connected to the front of the DR-135.
I can hook up a GPS to the console (back) serial port and get the
tracker to work.
Any suggestions for what to check?
Scott, can you post a schematic and/or board layouts to assist
troubleshooting this problem?
On May 24, 2007, at 9:35 AM, Bruce W. Martin, KQ4TV wrote:
> Ok I confirmed that the T2-135 will transmit if you tell it a
> specific location and to transmit with out a good gps lock. but it
> never seems to get a GPS lock. I have used the Deluo GPS direct to
> the laptop using the USB adapter and it seems o get lock just fine.
> It is acting like the T2-135 is never seeing any GPS data. Is there
> documentation for where the test points are to test for continuity
> from the front GPS port to the T2-135?
> On May 16, 2007, at 10:25 AM, Scott Miller wrote:
>> The noise is apparently a design flaw in the DR-135 - it gets
>> crosstalk from the data input to the speaker, regardless of the
>> volume setting. You can stop it by installing a 3.5mm plug in the
>> speaker jack to disable the internal speaker entirely.
>> From: email@example.com [mailto:firstname.lastname@example.org] On
>> Behalf Of Bruce W. Martin
>> Sent: Wednesday, May 16, 2007 7:43 AM
>> To: email@example.com
>> Subject: Re: [tracker2] T2-135 lessons being learned
>> I finally got around and put the radio back in the truck to test it
>> It powers up and I know the GPS is working and getting lock but the
>> tracker never transmits. It seems to be receiving.
>> Also, I notice that when the GPS is connected to the front GPS port
>> that there is a rhythmic noise coming from the speaker. If I disable
>> data or unplug the GPS it goes away. A different GPS plugged into the
>> DB9 on the back does not produce the noise.
>> I am heading for Dayton tomorrow morning and will bring it along.
>> On May 2, 2007, at 6:04 PM, Bruce W. Martin wrote:
>>> When I start it up I get both the red and green LEDs alternately
>>> flashing. If I start the config program and restart the radio/T2
>>> the Green LED is constant on and the program says:
>>> "Unsupported firmware version. Please upgrade configuration program.
>>> (ver 255 build 65535 target AP64-H)"
>>> I ran the downloaded the OT2.s19 firmware and ran the config
>>> program again replacing the firmware and it came right up.
>>> Mostly just reporting this so others can benefit from what I
>>> thanks for your assistance.
>>> See you in Dayton.
>>> Bruce, KQ4TV
>>> On May 2, 2007, at 3:11 PM, scott@... wrote:
>>>> If you open it up, you should see the LEDs blink at power-up.
>>>> They may be blinking constantly if the firmware is corrupted. As
>>>> long as it's still blinking, the config program should be able to
>>>> catch the bootloader and let you reload the firmware. You could
>>>> probably do it without the config program, too, but you'd probably
>>>> need to come up with a way to send the right byte sequence to
>>>> start the XMODEM download mode.
>>>> If it's not blinking at all, then it's possible the firmware got
>>>> wiped out completely. As far as I can remember, I've only had
>>>> that happen with overvoltage conditions, like 9 volts on the IRQ
>>>> pin. If it is totally blank, then you'll need to send it back for
>>>> I'll see if I can duplicate the problem myself. I might need to
>>>> set up the low-voltage inhibit on the processor.
>>>> From: Bruce W. Martin [mailto:yahoo@...]
>>>> To: OT2 [mailto:firstname.lastname@example.org]
>>>> Sent: Wed, 02 May 2007 12:52:15 -0700
>>>> Subject: [tracker2] T2-135 lessons being learned
>>>> So, I got my T2-135 and installed it. Easy.
>>>> After a few hours of trying different serial cables and different
>>>> computers realized I needed to put the DR-135 in data mode to
>> talk to
>>>> the T2.
>>>> Great! I can make changes with my Mac using Zterm or use the
>>>> latest OT
>>>> configuration program on Windows. I need to find something other
>>>> minicom for Linux.
>>>> Hooked up the GPS and an antenna and it tracked great.
>>>> Wanted to see how long the tracker would last on low power with a
>>>> 3 year
>>>> old UPS 7AH battery. Not as long as I hoped. Set it up in the
>>>> truck as I
>>>> went to work. Left it running with smart beaconing at about 90
>>>> while moving slow. After work I found the radio power cycling.
>>>> under load the battery would drop below some voltage threshold and
>>>> radio would turn off. Immediately the voltage would go up some now
>>>> there was no load and the radio would turn on. This cycle went
>> on for
>>>> who knows how long. Probably a few hours.
>>>> Now I can't communicate with the T2-135. Have I killed it? Is
>> there a
>>>> way I can get it back to default condition?
>>>> Bruce, KQ4TV
Bruce W. Martin, KQ4TV
8749 Lebanon Rd.
Mt. Juliet, TN 37122
36 13.990N 086 28.220W
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