kevin.dolan on 11 Jun, 2015 11:04 PM
If using the orange wire the baud rate should be set to 4800 or
use the green wire which is already set to 4800, if the green port
is not used with another 0183 feed. However this I expect will not
correct the issue. It may be that the T122 is giving bad data or
that their is a ground loop. I recommend moving one of the black or
white wires to the NMEA (-) of the T-122. If is possible to power
the unit then I would recommend moving both wires the NMEA (-). If
the unit does not power on with both wires then just move one.
Try moving NMEA ports and the ground wires and hopefully you
come to a combination that makes the data transfer correctly. I am
sorry I cannot be more specific but I have not seen this issue
before and do not have a T-122 to test with myself.
Output looks like this:
received message: $GPGSV,3,2,12,20,28,259,32,19,17,028,24,40,17,146,35,18,16,329,35*79
received message: $IIMWV,344,T,02.0,N,A*14
received message: $IIVHW,,,,,00.0,N,,*19
received message: $IIVLW,01372,N,000.0,N*54
received message: $GPGSV,3,3,12,07,12,091,19,05,11,214,19,17,07,149,30,11,07,073,20*7B
received message: $GPRMC,065457.000,A,6009.1656,N,02456.9818,E,0.04,196.07,230615,7.6,E,D*0C
received message: $GPVTG,196.07,T,,M,0.04,N,0.08,K,D*3D
received message: $GPZDA,065457.000,23,06,2015,,*52
received message: $IIVWR,002,L,01.6,N,,,,*7A
received message: $IIDPT,005.6,+0.0,*44
received message: $IIMTW,+11.0,C*38
Yes, the water is pretty darn cold for end-of-June.
kevin.dolan on 23 Jun, 2015 08:44 PM
Thank you for the log files and for the code. It will hopefully
help customers in the future. Looking at your information it seems
that the T122 is giving good data and I'm not sure what issue our
app has with it. I would suggest trying to use it with iRegatta
with "Ignore NMEA checksums" set to "On." It should work. Please
let me know how this goes.