This is working when using USB power, but not battery power. Setup:
5V Arduino's TX -> logic level shifter -> OpenLog's RX
OpenLog's TX -> resistor -> Arduino RX
Arduino's reset pin -> logic level shifter -> OpenLog's reset pin
The result is that, when the Arduino is powered off of USB, this logs fine. When it's powered off of a 11.1V LiPo battery (full charge) via the Arduino's barrel jack, the logger resets somewhat randomly about four times per second.
Can anyone see why this would happen?
For reference, the logic level shifter is the SparkFun BOB-08745.