A system includes a microcontroller, one or more sensors affixed to an object, and memory storing one or more programs including instructions for receiving and storing first sensor data from the one or more sensors in response to motion of the object, determining whether the first sensor data meets a first threshold, in accordance with a determination that the first sensor data meets the first threshold: receiving and storing second sensor data from the one or more sensors in response to subsequent motion of the object for as long as the second sensor data meets a second threshold, performing pattern recognition on the second sensor data, and identifying a first position of the object based on the pattern recognition of the second sensor data.