Use RS232 on a Forecr carrier board with Jetpack 6.0

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin NX
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Hi,

I have this carrier board https://www.forecr.io/products/jetson-orin-nx-industrial-fanless-pc-dsbox-ornx?variant=52325581357405 whose datasheet is here which says that RS232 is UART0.

I am trying to use RS232 on it and test using a loopback test (connect TX to RX using a cable). This is the tutorial that I found on their website to test it but I receive gibberish in loopback test when I do so. It doesn’t specify to set any particular pins to low/ high. I however tried the loopback test on their AGX board, set PM.04 and PN.01as per this to low using libgpiod and I receive the sent message fine.

Could someone please explain what’s happening here? Do I need to dig deeper into pinmux mapping to make RS232 work with Orin NX? FYI, I haven’t done it before. So, a bit noobish guide could help.

Thanks a lot in advance.

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I just figured it out. The correct port should be/dev/ttyTHS3 instead of /dev/ttyTHS1 as mentioned in the documentation.

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