[SOLVED] Multiple devices at a single serial port of 89C51 (8051)

[raowakeel]

yes you can do that.. use CD4052, this is an analog multiplexer..

you can select which input/output you want to receive without mixing the data.

hello
i am using 74hc157 for multiplexing my tx data ..but problem is after running my hardware i get perfect data..but after 2 to 3 minut it get mixed..i mean the data that i send to my gsm also shows on hyperteminal