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By shw19791031
#77924 ## Environment

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!