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Sensor device with persistent low power beacon

  • US 8,264,328 B2
  • Filed: 07/12/2010
  • Issued: 09/11/2012
  • Est. Priority Date: 09/28/2006
  • Status: Active Grant
First Claim
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1. A method comprising:

  • (a) operating a first device in a first operational mode in which a sensor and a transmitter are used at least occasionally to obtain and transmit sensor data to a second device, the sensor data being a measurement of athletic performance;

    (b) determining, by the first device, that a battery has reached a low power threshold that is a function of power consumed by the transmitter to transmit a beacon signal for a predetermined number of times; and

    (c) in response to determining that the battery has reached the low power threshold,operating the first device in a second operational mode wherein the sensor is not used, but wherein the first device at least occasionally causes the transmitter to transmit the beacon signal to the second device;

    wherein the transmission of the beacon signal occurs periodically for a period of time subsequent to detection of a stimulus by a transducer or to detection of user input.

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