Re: TTL/USB converter usage question

[Ramiro Aceves <ea1abz%gmail.com@localhost>]

El 14/10/24 a las 16:46, Robert Swindells escribió:
> Ramiro Aceves <ea1abz%gmail.com@localhost> wrote:
> > I have a Jupiter-T GPS timing module board that is connected to a home
> > made board with a Microchip PIC 12F629 microcontroller. They form a
> > simple amateur radio GPSDO unit(GPS disciplined Oscillator for my
> > radio lab) They communicate eachother using serial TX and RX 5 volt
> > signals. Recently it has problems to get the fix and want to debug it
> > (antenna problem or module problem, who knows).
> Maybe try running comms/minicom on the RPi to debug your setup.
Thanks, that is another software that I should learn to play. For now, I 
am ok with "cu -l /dev/ttyU0 -s 9600|hexdump -C" command. It works fine 
and I can see all bytes returned by the GPS module when asked with the 
@@Ea command by the PIC microcontroller.:


00000000  43 6f 6e 6e 65 63 74 65  64 0d 0a 0a 40 40 45 61 
|Connected...@@Ea|
00000010  0a 0e 07 e8 12 04 1a 00  00 00 00 08 b1 54 9b ff 
|.............T..|
00000020  35 f4 65 00 01 35 e4 00  00 00 00 00 00 00 00 00 
|5.e..5..........|
00000030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00 
|................|
*
00000050  00 00 00 00 4a 74 0d 0a  40 40 45 61 0a 0e 07 e8 
|....Jt..@@Ea....|
00000060  12 04 1c 00 00 00 00 08  b1 54 9b ff 35 f4 65 00 
|.........T..5.e.|
00000070  01 35 e4 00 00 00 00 00  00 00 00 00 00 00 00 00 
|.5..............|
00000080  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00 
|................|
*
000000a0  4a 72 0d 0a 40 40 45 61  0a 0e 07 e8 12 04 1e 00 
|Jr..@@Ea........|
000000b0  00 00 00 08 b1 54 9b ff  35 f4 65 00 01 35 e4 00 
|.....T..5.e..5..|
000000c0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00 
|................|
*
000000e0  00 00 00 00 00 00 00 00  00 00 00 00 4a 70 0d 0a 
|............Jp..|
000000f0  40 40 45 61 0a 0e 07 e8  12 04 20 00 00 00 00 08 |@@Ea...... 
.....|
00000100  b1 54 9b ff 35 f4 65 00  01 35 e4 00 00 00 00 00 
|.T..5.e..5......|
00000110  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00 
|................|
*
00000130  00 00 00 00 00 00 00 00  4a 4e 0d 0a 40 40 45 61 
|........JN..@@Ea|
00000140  0a 0e 07 e8 12 04 22 00  00 00 00 08 b1 54 9b ff 
|......"......T..|
00000150  35 f4 65 00 01 35 e4 00  00 00 00 00 00 00 00 00 
|5.e..5..........|
00000160  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00 
|................|

I am going to try another spare antenna I have lying around.

Regards.

Ramiro.