Using Ublox M8N GPS module with Jetson Nano

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

I connected the GPS module to Jetson.
but when i run the command cat /dev/ttyTHS1, it returns nothing.
what should i do? why is like that?

regards

3

Hi mastermetric096,

Are you using the devkit or custom board for Jetson Nano?
What’s your Jetpack version in use?

How did you connect the GPS module?
Are you using UART interface?

4

@KevinFFF tnx for reply.
i’m using Jetson Nano devkit.
and my jetpack version is as follows:

cat /etc/nv_tegra_release
# R32 (release), REVISION: 6.1, GCID: 27863751, BOARD: t210ref, EABI: aarch64, DATE: Mon Jul 26 19:20:30 UTC 2021

I connected the GPS module through UART. pins connections are as follows:
TX of GPS to RX of jetson
RX of GPS to TX of jetson
and also VCC and GND to Jetson’s.

i followed many tutorials. in the end, running sudo gpsd /dev/ttyTHS1 -n -N -D 3 doesn’t show anything useful.

5

Which UART interface are you using?
Do you use HW flow control(RTS/CTS) in your case?

Does your GPS module send messages automatically by itself if you don’t give any command to it?

7

“Which UART interface are you using?” - I’m using the UART pins on the J41.
“Do you use HW flow control(RTS/CTS) in your case?” - No, I’m not using anything special.
“Does your GPS module send messages automatically by itself if you don’t give any command to it?” - yes, Ublox M8N sends NMEA data some seconds after startup automatically.

In fact, i tested it using Arduino and it was sending the NMEA data / payload and i could see it on the Serial Monitor.

8

Could you short PIN8(UART1_TXD) and PIN10(UART1_RXD) on J41 to verify UART loopback test before connecting to your GPS module?

Please refer to the following commands to perform loopback test:

$ sudo su
# stty -F /dev/ttyTHS1 115200 raw -echo
# cat /dev/ttyTHS1 &
# echo "test" > /dev/ttyTHS1
10

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