# ESP8266 Power Consumption on each sleep mode

**URL:** https://forum.ficusonline.com/t/esp8266-power-consumption-on-each-sleep-mode/171
**Category:** ESP
**Created:** [2018 年 3 月 17 日午前 8:44 UTC](https://forum.ficusonline.com/t/esp8266-power-consumption-on-each-sleep-mode/171 "2018-03-17T08:44:46Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![tk-fuse](https://forum.ficusonline.com/user_avatar/forum.ficusonline.com/tk-fuse/32/255_2.png) [@tk-fuse](https://forum.ficusonline.com/u/tk-fuse)
#### Post date: [2018 年 3 月 17 日午前 8:44 UTC](https://forum.ficusonline.com/t/esp8266-power-consumption-on-each-sleep-mode/171/1 "2018-03-17T08:44:46Z")

</div>

**ESP8266 Power Consumption**  
Modem-Sleepがデフォルト。

 ![esp8266_power_consumption](https://forum.ficusonline.com/uploads/default/original/1X/468fa4251a2281199bc86b319f66d8a435956470.jpg)  
[https://bbs.espressif.com/viewtopic.php?f=6&t=133&p=485&hilit=sleep+modem#p485](https://bbs.espressif.com/viewtopic.php?f=6&t=133&p=485&hilit=sleep+modem#p485)

①：Modem-Sleep requires the CPU to be working, as in PWM or I2S applications. According to 802.11 standards (like U-APSD), it saves power to shut down the Wi-Fi Modem circuit while maintaining a Wi-Fi connection with no data transmission.  
E.g. in DTIM3, to maintain a sleep 300ms-wake 3ms cycle to receive AP’s Beacon packages, the current is about 15mA.

②：During Light-Sleep, the CPU may be suspended in applications like Wi-Fi switch. Without data transmission, the Wi-Fi Modem circuit can be turned off and CPU suspended to save power according to the 802.11 standard (U-APSD).  
E.g. in DTIM3, to maintain a sleep 300ms-wake 3ms cycle to receive AP’s Beacon packages, the current is about 0.9mA.

③：Deep-Sleep does not require Wi-Fi connection to be maintained. For application with long time lags between data transmission, e.g. a temperature sensor that checks the temperature every 100s.  
E.g. sleep 300s and waking up to connect to the AP (taking about 0.3~1s), the overall average current is less than 1mA.

**Features:light-sleep and deep-sleep under sdkV0.9.5**  
[https://bbs.espressif.com/viewtopic.php?f=7&t=171](https://bbs.espressif.com/viewtopic.php?f=7&t=171)

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