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With asterisk I can set the volume of TX and RX. But what are those options? I've already googled this but can't find anything.
Whats is the difference between TX and RX?
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TX and RX are abbreviations for Transmit and Receive, respectively.
Rx means Receive, and Tx means Transmit. They are relative to the device you're on. What's Tx to you is Rx to somewhere else, and vice versa. The only difference is the wires they hit.
RX is receive, incoming. TX is transmitting, outgoing.
As such, serial devices should have two serial pins: the receiver, RX, and the transmitter, TX. It's important to note that those RX and TX labels are with respect to the device itself. So the RX from one device should go to the TX of the other, and vice-versa.
RX is receive, incoming. TX is transmitting, outgoing.
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