Investigate Deep Sleep

[garthvh]

The real dash button turns on, connects to wifi and then sends the request to save power.

Look into using ESP.deepSleep to provide similar functionality

[chaeplin]

This is my version of Button using deepsleep to control lamp using mqtt.
https://github.com/chaeplin/esp8266_and_arduino/tree/master/_15-esp8266-dash-deepsleep-reset

1. static ip + reset button / deepsleep
2. NPN TR is used to cut off reset line while device is running(no bounce, no double click)
3. WiFi.disconnect() is used for consistent operation( under 5sec)
   --> when device wake up, sometimes it takes more than 10 sec to connect wifi without WiFi.disconnect()

[teopost]

+1