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Topic: Advice for wireless connectivity (Read 982 times) previous topic - next topic

Jack Christensen


Not sure why you would need an arduino at all.


Depending on the sensors, perhaps not!
MCP79411/12 RTC ... "One Million Ohms" ATtiny kit ... available at http://www.tindie.com/stores/JChristensen/

mjkzz

I agree with others, if you go xbee route, you might not need an Arduino, which has too much other stuff running and drawing power even if you put Arduino into deep sleep. I am new to Arduino, so be kind to me :-)

Actually, not to hijack this thread, anyone knows how much current an deep sleep Arduino Uno draws?
Search for "mjkzz" on eBay :-)

MichaelMeissner


Actually, not to hijack this thread, anyone knows how much current an deep sleep Arduino Uno draws?

You might want to look at the tutorial from Nick Gammon on power saving techniques: http://www.gammon.com.au/forum/?id=11497.

Jack Christensen


Actually, not to hijack this thread, anyone knows how much current an deep sleep Arduino Uno draws?


I measured my Arduino Uno at 42mA when running.
With the MCU in power-down mode (the deepest sleep mode), it still draws 31mA.
The ATmega328P microcontroller alone uses around 0.1µA in power-down mode.
I'm currently designing an Arduino-based data logger using an ATmega328P on a custom PC board. There are one or two other components that draw small idle currents as well, but when it's sleeping the whole board draws < 5µA. A "sleeping" Uno draws 6200 times more current.
MCP79411/12 RTC ... "One Million Ohms" ATtiny kit ... available at http://www.tindie.com/stores/JChristensen/

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