PC streaming serial to Multiple Arduinos

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i working on project stream video frames arduino controlled led display. display made of multiple arduino modules.

i able have them listening same serial stream pc. possible connect them this:    (wires = rx-rx , tx-tx)
pc <=usb=>arduino<=wires=>arduino<=wires=>arduino<=wires=>arduino

i tried 2 arduinos gnd's tied didn't work. first 1 plugged usb had rx light flashing , there no activity on second board. , there nothing displaying on led displays. if disconnected serial wires between 2 boards first display show correct information.

i sure saw post (i can't find now) saying should possible!

is there way of doing or need have usb connection each arduino pc? (and therefore 4 separate serial connections)

you can rs485 connections. it's similare serial communication, not point-to-point rs232 does.

many modules can share same 2 wires bus. need implement good/right protocol each module communicate others.



Arduino Forum > Using Arduino > Networking, Protocols, and Devices (Moderator: fabioc84) > PC streaming serial to Multiple Arduinos


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