Giants wrote:the power supply is 3,4V i miss something ?
Most people with similar problems state that their power supply is good, but the ESP is sensitive and very picky.
Your power supply must be able to deliver 3.3V (+- 10%) at (at least) 500mA (yes half an Ampere).
The power delivered by, for instance, a used USB -> TTL convertor just isn't good enough.
That's why I always state the you should start off with a real development board, see my signature, and move on to a separate ESP module once you've got a solid working design.