It is correct, to communicate with the phone you only need RX, TX and GND.
But the Data cable has some embedded logic that is powered from the DB9 connector DTR and/or RTS pin.
regards
Ralph
It is correct, to communicate with the phone you only need RX, TX and GND.
But the Data cable has some embedded logic that is powered from the DB9 connector DTR and/or RTS pin.
regards
Ralph
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