Light- or Modem Sleep

Ok, good to hear :) I will do a pull in the next days first adding deepsleep and modemsleep. However it seems to be possible to implement what you have done for the STM boards by using lightsleep. I found the following code (using light sleep and a timer):

//sleep over.
void fpm_wakup_cb_func1(void)
{
   wifi_fpm_close();   //disable sleep function
   wifi_set_opmode(STATION_MODE);      //set wifi mode to station mode
   wifi_station_connect();         //connect ap
}

void user_func(...)
{  
wifi_station_disconnect();
wifi_set_opmode(NULL_MODE);      //set wifi mode to null mode.
wifi_fpm_set_sleep_type(LIGHT_SLEEP_T);      //set force sleep type, clsoe rf&cpu
wifi_fpm_open();            //enable force sleep fucntion
wifi_fpm_set_wakeup_cb(fpm_wakup_cb_func­1)；   //Set fpm wakeup callback function 
wifi_fpm_do_sleep(10*1000);         // do sleep
...
}

Source

I think that would be the next step then...