Serial Communication with Attinys

hallo,

i hope there easy anwer question:

how send commands attiny84?

i bought 1 run gsm modul it... tested arduino nano v3, no problem.. next step build "programming shield" sockets nano , tiny(also working fine).

the problem there no rx, tx pins on arduino.. searched in internet , found things didnt work or did wong... hope can me...

i'm beginner pls don't call me idiot or smth 

and sry english know it's not best...

quote

the problem there no rx, tx pins on arduino

that's why softwareserial invented. well, 1 of reasons, anyway.

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