8266 12E will flash & show its loading to 100%, but doesn't work after reboot and disconnecting GPIO0 and GPIO15 (and every combination there of). I've had no problem with Nodemcu module and wemos, but this is my first time with just the chip (using FTDI but also tried using Arduino). I even tested the ports and some are HIGH (ie GPIO2 and 12 and 13). After researching many configurations, some showing using Nodemcu 1.0 as board others showing using generic 8266. What seemed odd to me is it showed it would load in either board setting. But still no blinking light on 2 or 13 (my test pins).