Jetson B01 Serial Data Packet Loss in Custom Carrier

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hi,
We have a custom carrier board working with the B01 Nano module. We are facing data packet loss issue on UART1_RXD pin 205.
Test Set up: Serial port 1 connected to serial port 2
Serial Console: Minicom
Ser 1 TX → Ser 2 RX ==> Successful
Ser 2 TX → Ser 1 RX ==> Fail

3

hello roshan.dsouza,

could you please try stopping and disabling the nvgetty service.
for example,

$ systemctl stop nvgetty
$ systemctl disable nvgetty
4

My test set up is looping back from serial port 1 to serial port 2, ie ttyTHS1 connected to ttyTHS2. When I issue the above commands, I am unable to open both the serial ports at once on 2 different minicom terminals which I was able to prior to the issue of these commands.

5

hello roshan.dsouza,

could you please share more details of those two serial ports you’re used,
for example, which pin you’re used for serial-1, and serial-2.
thanks

6

once I pass these commands, I am unable to open the serial ports with Minicom simultaneously which I was able to prior to issuing these commands

7

Serial Port 1 → UART0 from Nano → Level Translator → Multi protocol transceiver → Connector
Serial Port 2 → UART 1 from Nano → Level Translator → Multi protocol transceiver → Connector

8

hello roshan.dsouza,

suggest you should narrow down the issue by excluding multi-protocol transceiver, thanks