NEO 9 not communicating via UART

GPS/GNSS Development Boards
1

Is there any trick to getting the NEO-M9N to communicate on the RX/TX data lines? I have the same MEGA 2560 board loaded with the same software I’ve used on various NEO M6 derivatives and all I did was add a level shifter on the RX/TX lines. I’m powering the board with the 3.3V supply from the MEGA. Same data wires other than the level shifter. I plug in the NEO 6 and all is well. I plug in the NEO 9 and I get no data. I’ve tried reversing the TX/RX wires but no change. I see that the UART shares the SPI lines but the documentation says, if I short the SPI jumper it disables the UART. Is this correct. The jumpers are open as shipped from SparkFun.

I would post pics of the setup but I don’t have a camera right now available.

2

OK, seems like I’ve discovered my initial problem. Seems like the module is transmitting at 38400 baud rate instead of the 9600 baud rate of all the other modules I tested. I switched over to 38400 and I now have proper communications.

Is 38400 baud rate the normal default baud rate for these modules?

3

Page 15 of the [datasheet indicates a default baud rate of 38400 Baud, 8 bits, no parity bit, 1 stop bit.](https://cdn.sparkfun.com/assets/b/f/b/a/7/NEO-M9N_DataSheet__UBX-19014285_.pdf)