ESP8266 Community Forum

- Fri Jul 22, 2016 6:36 pm #51302

no need for an extra ATtiny just to power on/off your device, this is exactly what the deep sleep is for.

As I wrote for my case c): it is doing more than your dht and running for over a month now w/o remarkable discharge of the LiIon battery.

You mentioned about deep sleep but this would not turn the volatge regulator off would it ?

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- Sat Jul 23, 2016 8:23 am #51337 no, but the low dropout low power regulator I'm using has a quiescent current of max.10µA, add 10µA for esp, max.15µA for flashrom and max. 1µA for BME280. Thats less than 40µA, less than the self discharge of most batteries ... >50000h standby on a 2000mAh battery (if the self discharge wouldn't be mauch higher...)
(ok, admittedly I left out pull-up's but you get the figures)

Your problem will not be the deep sleep, your enemy is the active phase!

P.S.: beware of the simple crap 3.3V regulators they throw at you in the internet, a decent (and non fake) ldo regulator costs ... but less than a decent mosfet + ATtiny !

- Sat Jul 23, 2016 9:10 am #51341

beware of the simple crap 3.3V regulators

Effectively, some regulators, such AMS1117 has a quiescent current of 10mA without any load.

- Sat Jul 23, 2016 12:16 pm #51348

beware of the simple crap 3.3V regulators

Effectively, some regulators, such AMS1117 has a quiescent current of 10mA without any load.

I have an AMS1117 put it isn't step up, I am getting this one:

http://www.eu.diigiit.com/pololu-step-u ... 3v-ncp1402

And I am getting this mosfet and the Attiny are 1.60 as well:

http://www.mouser.es/Search/ProductDeta ... RL2203NPBF

Amazing selection of ESP8266 and ESP32 modules can be found here.