Dobrica Pavlinušić's random unstructured stuff
ESP8266: Revision 8
  
links
pinout

- all IO is 3.3V (3.6V max)
 
- CH_PD i chip-enable and has to be connected to VCC (3.3V)
 
- RST, GPIO0, GPIO2 should be pulled up to VCC for normal operation
 
- GPIO0 pull to ground for firmware update
 
- make sure that 3.3V VCC power supply can support 300-400mA or there WILL be problems!
 
serial port