ESP8266 Community Forum

Posted: **Sun Sep 10, 2017 11:06 am**

What's the best way to save power on the ESP8266? I have a configuration where the ESP is connected to another MCU and will be used just to report data to a remote server.

I have 2 options here:
1) Let main MCU cut power to the ESP
2) Let main MCU ask ESP to go in deep sleep until main MCU wakes up the ESP

I am considering the fact in which the ESP hangs and doesn't listen to MCU commands anymore (they communicate via serial port)

Posted: **Mon Sep 11, 2017 4:39 pm**

Hi, get the main unit to take CHPD low on the ESP.

Posted: **Wed Sep 13, 2017 6:32 pm**

Barnabybear wrote:Hi, get the main unit to take CHPD low on the ESP.

Would that shut down the ESP8266 safely? How does that compare to making the other MCU cutting power directly to VCC?

This cycle is going to happen for hundreds of times a day

ESP8266 Community Forum

Sending ESP to deep sleep from another MCU

Sending ESP to deep sleep from another MCU

Re: Sending ESP to deep sleep from another MCU

Re: Sending ESP to deep sleep from another MCU