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50mA draw in SLEEP_MODE_PWR_DOWN  XML
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nickthecook



Joined: 28/09/2014 21:23:47
Messages: 3
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Hi all,

I'm trying to get an Anarduino Mini to sleep to prolong battery life. I'm using this code in a function called by loop(), which I put together based on an article at arduino.cc:



The chip seems to go to sleep until pin 2 goes LOW, as desired. However, my multimeter says the anarduino is drawing 50mA in sleep, and closer to 60 when awake and playing a short tune on an attached speaker. Both these numbers seem high.

I've tried a number of other sleep code examples online with no luck. Do I need to do something different with the anarduino to get low current draw during sleep?

Thanks,

Nick
stevech



Joined: 07/07/2014 18:07:27
Messages: 91
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No radio on the board? It has to be configured to sleep.
nickthecook



Joined: 28/09/2014 21:23:47
Messages: 3
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No, no radio on board. I'll keep that in mind though for when I add the RFM73.
nickthecook



Joined: 28/09/2014 21:23:47
Messages: 3
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FYI, it was a damaged board. On further testing A few pins were acting funny on that board, so I soldered pins onto a new one, and current draw in sleep is in the uA range.
Rick



Joined: 30/05/2014 22:08:56
Messages: 93
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Hi Nick,
Thanks for posting.
How was the board damaged?
We do 100% QA and test of these boards prior to shipping, and we guarantee all of our products against DOA.
Please send me email if this was damaged in transit, I'd like to hear about it and get you a replacement.
Best Regards,
-Rick
obelix662000



Joined: 13/07/2014 10:46:23
Messages: 3
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Be sure that Tx and Rx are not connected. To get sub microamps sleep current I'm using FETs to disconnect serial port in my project. Otherwise current drain through serial port is in mA range.
 
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