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Transmitting and receiving data from UART0 interface

Francis Kumar
Expert 1330 points
Other Parts Discussed in Thread: AM1808

Hi,

 

I am using AM1808, I am trying to use UART0 for my GSM interface. I have modified in kernel for UART0. I am getting data on UART ‘RX’ line

 

With the help of “cat /dev/ttyS0” from console.

 

But I am not able to send any data on to the TX line(echo “AT” > /dev/ttyS0). What could be the reason. Please help me.

 

Thanks & Regards,

Kumar