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Good day.
I am new in Arduino so please bear with me. I need to know if Pins other than Pin 0 and 1 can be used as a serial connection. I have 3 devices that needs to be connected to Arduino via USB, but when I saw the specification of Arduino, it only implicate that only pins 0 and 1 is used for serial rx/tx. So is it possible to connect the other 2 usb connector via pin 2 to pin 5
Thank you very much for your answer
pins 0,1 are rx/tx for the hardware UART peripheral. Arduino (I assume UNO/Nano) have just one hardware UART.
there is a software library which makes use of any 2 pin to simulate hardware UART pin behavior for additional software UARTs (this is called bit banging). these "software" UARTs are not as fast as hardware ones and can't be relied on for fast baudrates (speeds). but for 9600kbps, they're good. keep in mind, that despite they are easy to implement and versatile, they use CPU time when communicating and if you are using interrupts in your code, data flow will be affected.
If you need your Arduino to be a USB slave for additional serial interfaces, then you can connect FTDI Basics to hardware serial ports (such as on Mega) or to software serial ports (such as on Mega).
Try to avoid the SoftwareSerial library, it’s very unreliable, that I can tell you from experience. In exchange try AltSoftSerial or NeoSWSerial, far better.
