ESP8266 & Arduino Nano problem

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hi there,
i received few of cheap modules, i'm having troubles them work. i'm using nano clone.
i attached pins in picture

with difference that, since read serial pins work @ 3.3v, used trimmer/potentiometer between arduino tx , esp rx.
i read module should powered external source, because arduino's 3v3 can supply around 50 ma.
what strange when measuring current drawn esp, it's around 20/30ma. there no transmission @ all.
any help? thank you!

ps: module on black pcb, in case help.

quote
i attached pins in picture
no picture.

do know can use arduino ide program esp (stand alone).

https://github.com/esp8266/arduino


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