I bought a multimeter , i set the red wire to 10 A and choose 200ma (Dc)
i grounded to com. Then i pluged battery 6v , red to red (multimeter) to vin and black to black (grnd)
The batteries went hot like hell and the reading was wrong ! and the core led shutdown .
Note : Without even pluging the core the multimeter reads 30 ma
what am i doing wrong ???
Thanks all ( i need to know the code current draw)
I just did another way now .
I pluged usb there
and i put
Vin —> red multimiter (red)
grd --> com multimeter (black)
When i put multimeter to Voltage it read 4.5 v (which is right)
When i put the multimeter to 200 ma to read current the multimeter gives me 2.12
but the spark core stops led and restart itself
I meant when i plug the multimeter to the battery .
But the battery isnt connected to the core . So the current must be 0 in my mind because the battery isnt attached to any device . thats what i meant
Now i understood it . i watched this video i ll paste the link so a noob like me can learn
So the idea is The red of multimeter goes to red
then the black continue the circuit by also connect to red .
watch the video guys (in case you need help like me)
yeah, generally when unconnected multimeters read >0 current, they've blown their fuse. i had one that read 200mA when the leads weren't even plugged in!
anyway did you get it working after watching the video? the spark should use 35mA when asleep and 350mA when awake. i never managed to get an accurate reading in deep sleep, it still said 35mA which isn't right, it should be a lot less.
I got it working yes .
wifi is on 186 ma
sleep is 35 ma
I ll try deep sleep now and tell you the current
LOL , i made a sleep in the loop , and then i said i ll reset to check it out . seems im stuck and im trying to reset to factory with no help . i ll retry in a hour or se
We did a bunch of testing over here and using a very precise multimeter I found the current during WiFi communitcations to be 145mA, and in deep sleep it was 187uA.
Sounds fair, but what kind of current measurement accuracy does your meter have? Unless it’s a really expensive one, it’s probably not going to measure microamps very well and will show up as more than a milliamp.
Can you please share the code you used to check the core current consumption in deep sleep mode. I need to be sure i am not doing something wrong . 2.2 ma is huge comparing to 187uA my project depends a lot on consumption of current
I tried with usb power , and i tried with 6v battery connected to vin and grd same results