ESP8266 Community Forum

- Tue Jul 31, 2018 7:54 am #77502 Hi all,

I manage to get the esp8266 to go to a modem_sleep state (By using delay(1);) so that power consumption drops from ~70mA to ~15am (except during the beacons).

However, it seems, that there is a ~10 seconds timeout before esp8266 goes to the modem_sleep -state after WIFI connection.

Is there a way to get the esp8266 to modem_sleep state any faster? For example, right after getting the IP?

- Tue Jul 31, 2018 11:52 am #77507 if you are using dhcp then it could just be the time between the "connect" (authentication) and successful end of the following dhcp negotiation.
you could also try WiFi.forceSleepBegin()

- Wed Aug 01, 2018 7:00 am #77525 Thank you Schulti.

I need to debug more, but it seems that there is some some kind of timeout before the esp goes to modem_sleep. Does anyone know about that or is it documented somewhere?

Also, to my understanding, WiFi.forceSleepBegin() will not work, since it will close the WiFi connection, right?

- Wed Aug 01, 2018 7:56 am #77527 Thanks schufti for your response,

based on my short set of tests, it seems that the time to go to modem_sleep seems to happen after the timeout. Not because the delay in dhcp negotiation. I will test more.

Does anyone know about the timeout or if it's documented somewhere?

If I have understood right, i cannot use WiFi.forceSleepBegin() because that will close the wifi connection. Right?