Connect multiple devices on raspberry pi

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Do GPIO ports (on raspberry pi) can be used for serial communication? or, how we can connect multiple devices for simultaneous communication on single RX and TX of raspberry pi?

Edit: I have two devices, a GPS module and a GPRS/GSM module to connect, both uses RX and TX to communicate with Pi. GPRS module has SDA SCL pins that I can connect to Pi, but I am not getting the device address (using command i2cdetect -y 1). GPS module has TX and RX pins only which I have to connect to Pi's RX and TX.

Posted 18-Jul-15 22:19pm

ttddssg

Updated 18-Jul-15 23:23pm

Wendelius

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Sergey Alexandrovich Kryukov 19-Jul-15 14:51pm

Why?
—SA

barneyman 19-Jul-15 23:14pm

can't you just use multiple FTDI usb boards?

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Sergey Alexandrovich Kryukov · Answer 1 · 2015-07-19T08:58:00

Theoretically speaking, yes, but you won't want to get into so much trouble — they are not designed for this purpose. It would be quite difficult to organize such communication. You will understand it if you understand what GPIO is: https://en.wikipedia.org/wiki/General-purpose_input/output[^].

For communications, USB or Ethernet is used. In you have some other device (GSP, modem, anything) which still uses something line RS-232, you can use one of the adapter products.

—SA