What's the power draw in shallow sleep?

General
1

Hi, What’s the power draw in shallow sleep? Is it the same as imp.setpowersave(true);

Apologies if it’s in the doco? I’ve looked and can’t find any specific for shallow sleep.

Thanks for the great product,

David.

2

We have system-tests that draw little graphs of these values, so I can just read them off for you (this is for imp001, but '002 and '003 aren’t much different):

Imp busy (tight loop), wifi off, blinkup off: 44mA
Shallow sleep, wifi off, blinkup off: 4mA
Shallow sleep, wifi on (powersave), blinkup off: 8mA
Shallow sleep, wifi off, blinkup on: 20mA
Shallow sleep, wifi on (no powersave), blinkup off: 62mA

Peter

3

If I read this right, just turning off Blinkup saves 16mA? That seems huge, surely that is not just for the phototransistor?

4

The figure includes an averaged LED current for showing BlinkUp codes.

5

It will also include the LEDs, and the additional CPU power taken up reading the phototransistor samples and hunting for blink-up activity among them.

Peter

6

(plus, it locks some of the internal SoC buses at higher speeds, which accounts for some of the power use)

7

Just to clarify; “blinkup on” power consumption is by default only applicable during the first 60 seconds after cold power-up while the LED is flashing.

8

…you can also turn it off (or, force it on) with imp.enableblinkup().