ESP8266 Community Forum

- Thu Feb 25, 2016 12:11 pm #41874 Hey,

So I'm building a system for measuring temperature and humidity. For that purpose I'm using ESP12-E and DHT21. I got the whole thing working perfectly. Then I tried the deep_sleep mode. I succeeded in getting the ESP12-E waking up again and taking measurements. However, when measuring current consumed during deep sleep (using two methods : Digilent's Analog Discovery and a multimeter VC130), the value I got was higher than what I expected.

According to the datasheet, the current consumption should be 10µA during deep sleep; I'm getting 6mA.

Have anyone encountered this before. Is the current consumption during deep sleep for ESP12-E that much different from ESP8266?

- Wed Mar 09, 2016 10:07 am #42757 We're having a similar problem on our design. We're getting 140uA in deep sleep on a WROOM-02 module, which is also listed as 10uA in deep sleep. We even see this current when we turn off the enable pin; in that state it is only supposed to be using 5uA. We're concerned that the default pin state in the power-down mode might have them sinking small currents from the our LEDs or some other component on our board (normally our LED pins are active-low outputs and the LEDs are pulled high to 3.3v). Unfortunately, I can't find any solid information about how these pins behave when in deep sleep or chip disabled states.

Did you ever figure out where your current was going?

--Sid

- Wed Mar 16, 2016 11:48 pm #43372

Hey,

So I'm building a system for measuring temperature and humidity. For that purpose I'm using ESP12-E and DHT21. I got the whole thing working perfectly. Then I tried the deep_sleep mode. I succeeded in getting the ESP12-E waking up again and taking measurements. However, when measuring current consumed during deep sleep (using two methods : Digilent's Analog Discovery and a multimeter VC130), the value I got was higher than what I expected.

According to the datasheet, the current consumption should be 10µA during deep sleep; I'm getting 6mA.

Have anyone encountered this before. Is the current consumption during deep sleep for ESP12-E that much different from ESP8266?

how are you able to get it off deep sleep mode with external sensor? did you use the sensor input directly?

- Wed Mar 23, 2016 11:14 am #43888

how are you able to get it off deep sleep mode with external sensor? did you use the sensor input directly?

The sensor did not take part in the wake-up process. The data wire was on GPIO14. So I just got the chip off deep sleep mode by wiring GPIO16 and RST.

I tried powering it from the chip, but the error rate was high, since GPIO are at 3.3V and the sensor works tipically at 5V. So I powered the sensor externally.