> Running at 2mhz: > While waiting for a keypress: 18.3ma @ 5.07v > While writing to sdcard: 33-38ma @ 5.07v
That's not bad by itself. This is roughly 1/3 of the current draw of the M102 itself, so maybe ~33% impact on battery life with no optimization. > This is with no special tricks to go idle and draw low power. I think there > are lowpower libraries that can do some things, and definitely there are > purely eltronics ways to cut power and restore power based on serial > activity. But my test code right now is just sitting in a loop reading the > serial port. I'm pretty sure the serial port can be used to wake from deep sleep, so the idle current can probably go to single-digit mA or lower depending on how the SD card handles sleep. Nice! -Josh
