SparkFun Forums

[Helder]

Hello,
I´m having some problems in conecting the logomatic with a GPS HAICOM 204-III. Instead of a normal NMEA sentence in the logfile, I get this stranges characters:

§N>>>>V"æ)Önâù%—V}Nú9“暦æšg—N::N62N6.N6>N:NNNNNN:F&N:F>N:F2V2æ)Önâùe¥–

or

ᨶ♆㺧Ṇ㹎㸾◹㧺Ꚛ㩎⸺㙎㙎㹆㩎㩆㩎♆㉖⧲㉎㩎㩎㨺≎⸾⸺㙎Ḧ㙎ᨮ㩎个㨾㉎∲㩎ᨶ㩎⸮㉎◹㙎∦㙎∺㙎㨲

I conect the TX (GPS) to RX (Logomatic) and Ground with Ground.
The GPS works in 4800 8-N-1
The Logcon file is like this:

MODE = 0
ASCII = N
Baud = 3
Frequency = 100
Trigger Character = $
Text Frame = 100
AD1.5 = N
AD1.4 = N
AD1.3 = N
AD0.3 = N
AD0.2 = N
AD0.1 = N
AD1.2 = N
AD0.4 = N
AD1.7 = N
AD1.6 = N
Safty On = Y

Does anyone know what could be wrong?

Thank you

[bluearcus]

Hi Helder,

I have the same problem.

I'm using non-triggered Auto UART mode (Mode 0) at Baud = 3, which should be 4800, 8-N-1.

I've tried two separate sources for my serial in... a GPS and a laptop. Both are communicating fine (with each other) at 4800 8-N-1.

The serial connections are wired correctly, TX/RX correct way around, GND connected up.

The logomatic though just produces files full of junk, highly similar to those you have shown.

Code: Select all

MODE = 0
ASCII = N
Baud = 3
Frequency = 100
Trigger Character = $
Text Frame = 200
AD1.5 = N
AD1.4 = N
AD1.3 = N
AD0.3 = N
AD0.2 = N
AD0.1 = N
AD1.2 = N
AD0.4 = N
AD1.7 = N
AD1.6 = N
Safty On = Y

Gives a file full of junk.

I can log the GPS quite successfully using my PC. Sending data to the logomatic from the PC at 8-n-1 4800 gives the same result as with the GPS, garbage.

Any ideas. I am tearing my hair out at this... no idea what the problem is and no clue how to diagnose it.

Regards,

Mike

[busonerd]

Have you made sure the the polarity of the signals are right? aka:

5V/3.3V: 1, Stop bit, Idle State
0V: 0, Start bit

Cheers,

--David Carne

[anothercyclist]

I know this was an old thread, but I thought it would be useful to post a reply/solution. The Logomatic is TTL. Many GPS units are RS232, so you will need a line converter (eg. MAX232). I just got my Logomatic and it recorded garbage when I connected it to my Garmin GPS. Installed a MAX232 and it works fine now.