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Stuck after flashing an ESP-12

I followed the instructions from
to flash my EPS-12. I used the Flash’n’Chips tool in the version of the 24th of Sep with the included firmware.

After a successful flash progress nothing happened. I don't see the device as serial device anymore.
Not in flashing mode neither in normal mode (GPIO 0 up).  So I cant flash it again. 
I dont see any SMARTJS_* Wifi.
The esp8266's led only flashes once on power.

What can I do next? Any other wiring for normal use (I only have VVC and CH_PD on high and GRD and GPIO15 on down)?  

(I use Mac OS)


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