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Is it possible to directly communicate USB D+ D- to Arduino Mega serial port TX RX?

Nafis Abdullah Khan
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No, D+/- are high frequency USB signals. TX/RX is 5V UART protocol, i.e. compeletely different. But you can e.g. use AT90USB128x processor to avoid 16u2 bridge. The prosessor is not so mighty as 2560 but it's cheaper and simplifies design.

TMa
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