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Hi, this is my first post.

I've been tinkering with a Fio/XBee combo for measuring the environment of my beehives. I've been successfully collecting test data in my basement using a few sensors. So far so good.

The next step is to lower the power consumption so it can be put outside with a solar charger. According to my meter my setup is drawing around 60mA. I first tried following these instructions

http://semifluid.com/2012/09/07/arduino-fio-low-power-setup/

But when the Fio is allegedly in sleep mode it's still drawing about 53mA. After that didn't work I tried this very minimal code but the power consumption is the same.

Code:

#include <avr/sleep.h>

void setup ()
{
  set_sleep_mode (SLEEP_MODE_PWR_DOWN); 
  sleep_enable();
  sleep_cpu (); 
}  // end of setup

void loop () { }

I'm measuring the current by placing my meter in series with the power line coming from the battery. It's a radio shack meter and I've got the dial set to the 32/320 mA setting.

I would appreciate any tips to troubleshoot this. I feel like I've exhausted google for alternatives.