esp8266ex (ESP-12S)
## Application
- Waiting for incoming MQTT packet to boot the master device, use battery.
- So deep-sleep is useless, I have to use light-sleep keeping MQTT connection.
## Problem Description
- forced light sleep: ok!, 0.7~0.8mA current, but WIFI have to be disconnected. It is worse than deep-sleep.
- automatic light sleep: never success!, because I cannot manually halt (control) the CPU while DTIM period.
### Dear Espressif!
Please help me!