nmea to / from RT550-AIS

[gildas declercq]

Hi all,

In case some could share experience.
I have a VHF Navicom RT550-AIS.

I am trying to send GPS data from MacArthur HAT
and get the AIS data to MacArthur HAT.

I followed the instructions of the HAT and nmea0183 TX is blinking but VHF still shows "no GPS information".

I did some tests like switching TX- and TX+.

but in fact I wonder if my cabling on the VHF is correct.

does anyone avec this VHF to confirm I am using the correct wire colors ?

thanks a lot

Gildas

[Adrian]

Hi all,

In case some could share experience.
I have a VHF Navicom RT550-AIS.

I am trying to send GPS data from MacArthur HAT
and get the AIS data to MacArthur HAT.

I followed the instructions of the HAT and nmea0183 TX is blinking but VHF still shows "no GPS information".

I did some tests like switching TX- and TX+.

but in fact I wonder if my cabling on the VHF is correct.

does anyone avec this VHF to confirm I am using the correct wire colors ?

thanks a lot

Gildas

Based on what I found online, NMEA TX+/- connects to the yellow and green wires of the RT-550.
https://www.manualslib.com/manual/126751...e=6#manual

Make sure that you configured the correct speed for the serial port. It is likely 4800 bps which is the standard speed for NMEA 0183, but as the RT-550 also is an AIS receiver, it may run at 38400.

[gildas declercq]

Hi Adrian

I aggree, this is what I tried so far
I will try to use lower baud rate

---

additional question,
how can I test that some data transit on the cable ?
can I mesure volts for example ?

[Adrian]

Hi Adrian

I aggree, this is what I tried so far
I will try to use lower baud rate

---

additional question,
how can I test that some data transit on the cable ?
can I mesure volts for example ?

Measuring voltages will not be helpful as we're trying to debug data transmission. An oscilloscope trace would be more useful.

Besides data transfer speed, another possible cause is, that OpenPlotter is not configured to send GPS data to that NMEA output.