timyboyb
New Member
Is this multiplexer capable to multiplex AIS, GPS, (38400) and downsample GPS to my 4800 VHF?
NMEA 0183 Multiplexer and logger
- Thread starter rgarside
- Start date
rgarside
Well-Known Member
I haven't done that on my one, as I found other solutions to those issues.
In principle there's no reason why it shouldn't do that. The Mega 2560 has 4 hardware UARTs. Each UART [port] gives a listener and a talker operating at the baud rate set for that port. One UART is used for the programming communication channel, so it's easier to leave that uncommitted to other uses if possible.
At the moment I just use two listeners to pick up the data from the two NMEA data streams I have [both 4800 baud], and I have set it up to be able to send selected data to one of the talkers so that if I ever get a more intellectual tiller pilot it would be able to steer using the wind vane data.
Hence one UART is free and could operate at the AIS data rate, it would have to be tried to make sure it had sufficient capacity to handle the additional data, and had the right buffer sizes to cope.
rgarside
Well-Known Member
The current code, and some description, can be found here:-
https://www.dropbox.com/sh/ka1kx4m6j21fzgh/AADd2Dh4y0ieY_wnH_VS0O-2a?dl=0
https://www.dropbox.com/sh/ka1kx4m6j21fzgh/AADd2Dh4y0ieY_wnH_VS0O-2a?dl=0
