From Trammell Hudson's Projects

Esp8266 battery run down test

For the module to work with arduino:

  • REST pull up 10k
  • CH_PD pull up 10k
  • GPIO2 pull up 10k
  • GPIO15 pull down 10k

To enter programming mode:

  • Pull GPIO0 down
  • Pull REST down
  • Release REST
  • Release GPIO0

At 1 Hz updates on a WPA2 network it draws about 150 mA. Ran for an hour on a LIR2450 battery.