ESP8266 Community Forum

- Tue Jul 21, 2015 12:03 am #23784 The specs say deep sleep current consumption is only 10uA. Has anyone made actual measurements? Is it really as low as 10uA?

http://www.adafruit.com/datasheets/ESP8 ... nglish.pdf

- Tue Jul 21, 2015 1:26 am #23790 From what i can tell it can be about that, but its very dependent on the supply voltage. A while back someone here did a post with a table of sleep current with different supply voltages, (can't find the link to that post now, can anyone else?) so i did a similar test to see if i got the same. Here it is:

Code: Select all      DeepSleep
Vcc             Current (microamps)
2.3              5
2.4              6
2.5              6
2.6              6
2.7              7
2.8              8
2.9              9
3.0             10
3.1             11
3.2             15
3.3             37
3.4             70
3.5             73
3.6             130
3.7             215
3.8             264
3.9             363
4.0             435
4.1             570
4.2             730


- Tue Jul 21, 2015 1:31 am #23791

From what i can tell it can be about that, but its very dependent on the supply voltage. A while back someone here did a post with a table of sleep current with different supply voltages, (can't find the link to that post now, can anyone else?) so i did a similar test to see if i got the same. Here it is:

Code: Select all      DeepSleep
Vcc             Current (microamps)
2.3              5
2.4              6
2.5              6
2.6              6
2.7              7
2.8              8
2.9              9
3.0             10
3.1             11
3.2             15
3.3             37
3.4             70
3.5             73
3.6             130
3.7             215
3.8             264
3.9             363
4.0             435
4.1             570
4.2             730


I thought ESP8266 operates only at 3.3V. At 3.1V, there were reports that the SPI flash would get corrupted.

- Tue Jul 21, 2015 1:43 am #23793

I thought ESP8266 operates only at 3.3V. At 3.1V, there were reports that the SPI flash would get corrupted.

Thats not been my experience, and have battery powered ones running fine with lower voltage than that. eg here.

In the SDK doc it says "The range of operating voltage of ESP8266 is 1.8V~3.6V".

I keep meaning to but haven't got around to doing some tests of the WiFi functionality like speed and range to see how that changes with different supply voltages.