Colleagues,
What "network topology" is NMEA 0183 typically used in? Is it intended only for point-to-point wiring?
In the standard.
Any suggestion, insight or reference is really appreciated!
Cheers,
- Nick
P.S. There is NMEA 2000, which runns on a multidrop CAN bus. There are also NMEA 0183 to Ethernet bridges. I'm aware of them.
What "network topology" is NMEA 0183 typically used in? Is it intended only for point-to-point wiring?
In the standard.
- Communication is asynchronous. Talkers (remote devices) can transmit whenever they wish. NMEA 0183 protocol doesn't define collision resolution.
- There are predefined Talker IDs. But what to do if there are 2x identical depth sounders? The sentences don't have fields for numeric addressing.
- Standard suggests RS-422 and RS-232 for electrical interface. These are intended for point-to-point communication.
Any suggestion, insight or reference is really appreciated!
Cheers,
- Nick
P.S. There is NMEA 2000, which runns on a multidrop CAN bus. There are also NMEA 0183 to Ethernet bridges. I'm aware of them.