By using the configurator you can use GGA and ZDA not more than two NMEA codes. The code main.h also will only allow 4800 baud on port 2 - not too serious. The simplest way to fix the code would be to change the GPSCON.txt to include the number of NMEA sentences required. But this will require an upgrade of the firmware.
You can use more than 2 codes in my experience. You may have to increade the baud rate though or increase the time between refresh.
Steve
You are correct on the RS232 board. On the data logger board only 4800 baud work and only two NMEA sentences. (See code in main.h) Thanks for the configurator though. I could achieve what I wanted by changing the two sentences from the default GGA, VTG to GSA, RMC. That is date, position, speed and signal strength
Dewald