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UART communication - Can't type anything in PuTTY.

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Putty displays ONLY that what comes back from the remote end, so if the remote and is not doing echo (printing back anything you type), you will not see it, but it is sent.

In the configuration of your current session, under "Terminal" you can force Putty to do local echoing, which will show things you type. If both local echoing is on, and the remote end does echo, you'll see every character you type displayed double.

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