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Sending ESP to deep sleep from another MCU

PostPosted: Sun Sep 10, 2017 11:06 am
by Mohamed Elhariry
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)

Re: Sending ESP to deep sleep from another MCU

PostPosted: Mon Sep 11, 2017 4:39 pm
by Barnabybear
Hi, get the main unit to take CHPD low on the ESP.

Re: Sending ESP to deep sleep from another MCU

PostPosted: Wed Sep 13, 2017 6:32 pm
by Mohamed Elhariry
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