How is the strategy to test UART ( auto test, if error show on led )

I think you need to define what you mean by 'test'. It may be possible to put the UART into a loopback mode, in which case you will test Server---UART

However it doesn't test anything beyond the UART (e.g. level translators, cables etc.)

You could also test for the state of (I'm going to get this wrong) DTS,CTS lines but only if you know the status expected.

Can't think of anything else

Hi All, Simple question for you. : )

I am going to test a UART, I have a embedded CPU, so I can control it.

but the clinet still sleeping at that time I testing UART.

Server Clinet

Do I have to make sure clinet OK first ?

Does Only send and receive data can make sure UART OK?

Thank you very much for your help. Best regards, Boki.

Got the ideal, I will try. Thanks!

Best regards, Boki.

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