get more UART from Arduino

Forum 2005-2010 (read only) Hardware Interfacing
1

hi Guys:
Is there any hardware solution to increase the UART port number on Arduino? I want to control a serial LCD, a ultra sonic sensor and still keep connected with processing on PC. It seems resource consuming using a soft UART.

Thanks~

2

You could use a MUX like the 74HC157 to switch between two serial links. Use one of the digital outs of the Arduino to select the position of the switch, the mux in/outs should go to the Txd/Rxd's of the Arduino and devices.

PS, you have an email with diagrams

3

Thank you so much Eric :wink: So that's the best option I have... I have sourced for some UART mux chips... but too much for some simple controlling.

I'll try it out and post here.