[UAT] TNC-Pi on I2C bus

[Janos Tolgyesi]

I tried to find another way to setup a more confortable tracker on RPi.
Becuase in this moment I dont able to swich the TNC-RPi from the serial
line access to the possible I2C bus, I started to examine my gps modul.
This is a small, nice module, with the MTK chipset in it, this is from
MediaTek. The module produced by Quectel, and its name is L10. But it is
not the end of the producer-chain, because this module need some small
additional parts, power unit, level shift/converters, USB and antenna
connectors. This was made buy a small serbian comapany,  on a small
additional PCB, the ready-to-use modul name is GPS Click L10. In the small
dokumantation we can read, the modul is accessible on serial port, on i2c
bus, and on usb. But there is another notes: to use on usb is not
recommended, and the i2c use not supported by the present firmware, if you
want to use, can ask the producer..another note: If you attache it on
Windows on USB, the op system recognizes it, dont need any driver. I tried
it on XP, but it didnot recognized. Finally I found a utility on linux,
support this MediaTek MTK gps chipsets, its name is mtkbabel. If I install
it, come up a usb/serial device, /dev/ttyACM0, and on this can read the
nmea data words.
But it seems, this serial line use the same hardware lines, on the UART: it
dont work together with the TNC-RPi, which is use on RPI the /dev/ttyAMA0.
t.janos


On Wed, Apr 3, 2013 at 11:17 AM, Janos Tolgyesi <hg5apz at gmail.com> wrote:

> Hi Dan,
> thank you for your answer!
> The next stepps, I made:
> I checked the RPi whitout the TNC-RPi board, it produced the same report
> (on all the i2c bus addresses find "devices")
> After this I checked the pull-up resistors on the I2C bus on the RPi,s
> PCB, with a magnifier glass and I measured the resistort to the 3.3V, it
> seems it is OK.
> After this I installed the i2c modules/tools on another SD card on another
> raspbian system, the result is the same.
> Now I would ask my friend, allow me to boot on his RPi with my SD card, to
> check, in the hw or in the sw is the problem?
> thank you, best wishes:
> t.janos
>
>
> On Wed, Apr 3, 2013 at 12:38 AM, Dan Smith <dsmith at danplanet.com> wrote:
>
>> > I see you are active on the yahoo group
>>
>> Hmm, not me, but there are a lot of "Dan Smith" characters out there!
>>
>> > Do you have such a config with success, or this is my problem only? I
>> > havenot too much idea, where can I search the solution.
>> > best:
>>
>> I don't know the answer to your question, but someone here might. It'd
>> definitely be a nice setup for a tracker :)
>>
>> --
>> Dan Smith
>> www.danplanet.com
>> KK7DS
>>
>> _______________________________________________
>> UAT mailing list
>> UAT at lists.danplanet.com
>> http://intrepid.danplanet.com/mailman/listinfo/uat
>>
>>
>
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