Hi guys, I got my sample yesterday and have it soldered now. I have 3v3, GND connect to a 3.3v power supply and RX/TX connected to the USB to Serial adapter. Unfortunately it keeps crashing: ets Jul 5 2015,rst cause:1, boot mode:(13) _stack_sentry: 0x3fffe1d0, __stack: 0x40000000, _bss_start: 0x3fff...