Monitoring power status

1. An appliance comprising:

an electrical plug housing, the electrical plug housing further comprising:

a radio transmitter;

a sensor configured to (i) detect the power status of the appliance, wherein the sensor is configured to detect an existence of an electrical current flowing through at least a portion of the appliance and, (ii) responsive to a detection of an existence of an electrical current flowing through at least a portion of the appliance, generate information that is indicative of whether the appliance is powered on or off;

one or more processors; and

one or more data storage devices storing (i) an appliance identifier associated with the appliance, (ii) information describing a particular appliance classification type, wherein the particular appliance classification type indicates whether the appliance is either an appliance that should be left powered on or is an appliance that should be left powered off, and (iii) instructions that are operable, when executed by the one or more processors, to cause the one or more processors to perform operations comprising:

periodically obtaining, by the one or more processors and from the sensor, the information generated by the sensor that is indicative of whether the appliance is powered on or off;

receiving, using the radio transmitter, a request, that originates from a mobile application of a user device, for the power status of the appliance; and

in response to receiving the request for the power status of the appliance that originates from the mobile application of the user device, transmitting, using the radio transmitter, (i) the appliance identifier associated with the appliance, (ii) the information describing the particular appliance classification type, and (iii) the power status associated with the appliance as indicated by at least a portion of the information that was generated by the sensor and obtained by the one or more processors.

2. The appliance of claim 1 ,

wherein the sensor is configured to detect the existence of current flowing through at least a portion of the appliance by detecting the existence of a magnetic field.

3. The appliance of claim 1 , further comprising a battery that is housed in the electrical plug.

4. The appliance of claim 3 , further comprising recharging circuitry in the plug that is configured to recharge the battery using inductive coupling with a conductor carrying alternating current through the plug.

5. The appliance of claim 1 , wherein the (i) the appliance identifier associated with the appliance, (ii) the information describing the particular appliance classification type, and (iii) the power status associated with the appliance as indicated by the information that was generated by the sensor and obtained by the one or more processors are transmitted in a single message.

6. The appliance of claim 1 , wherein the operations further comprise:

determining an average amount of power used by the appliance over a period of time; and,

transmitting the determined average amount of power using the radio transmitter.

7. The appliance of claim 1 , wherein the appliance is a hair dryer, a clothes iron, a curling iron, a television, an electric space heater or a refrigerator.

8. The appliance of claim 1 , wherein the transmitted information describing the device classification type, when received and processed by a user device, is configured to cause the user device to generate a graphical power indicator for output on a display of the user device.

9. The device of claim 1 , wherein the appliance that should be left powered on includes an appliance that should be left powered on when not in use.

10. The device of claim 1 , wherein the appliance that should be left powered off includes an appliance that should be left powered off when not in use.

11. A method comprising:

detecting the power status of an appliance using a sensor, wherein detecting the power status of the appliance includes, determining, by the sensor, whether an electrical current flowing through at least a portion of the appliance has been detected;

responsive to the detection of an electrical current flowing through at least a portion of the appliance, generating, by the sensor, information that is indicative of whether the appliance is powered on or off;

storing, on one or more storage devices, (i) an appliance identifier associated with the appliance, (ii) information describing a particular appliance classification type, wherein the particular appliance classification type indicates whether the appliance is either an appliance that should be left powered on or is an appliance that should be left powered off;

receiving, using a radio transmitter, a request, that originates from a mobile application of a user device, for the power status of the appliance;

in response to receiving the request for the power status of the appliance that originates from the mobile application of the user device, accessing, using one or more processors, the storage device to retrieve (i) the appliance identifier associated with the appliance, (ii) the information describing the particular appliance classification type, and (iii) the power status associated with the appliance as indicated by the information that was generated by the sensor and obtained by the one or more processors; and

transmitting, using the radio transmitter, (i) the appliance identifier associated with the appliance, (ii) the information describing the particular appliance classification type, and (iii) the power status associated with the appliance as indicated by at least a portion of the information that was generated by the sensor and obtained by the one or more processors,

wherein the radio transmitter, the sensor, the one or more storage devices, and the one or more processors are each housed within an electrical plug of the appliance.

12. The method of claim 11 , wherein determining whether an electrical current is flowing through the appliance comprises:

determining that the electrical current is flowing through at least a portion of the device appliance comprises detecting an existence of a magnetic field.

13. The method of claim 11 , comprising:

recharging a battery using recharging circuitry that is (i) housed in the electrical plug and (ii) configured to charge the battery using inductive coupling with a conductor carrying alternating current through the plug.

14. The method of claim 11 , wherein transmitting, using a radio transmitter, (i) the appliance identifier associated with the appliance, (ii) the information describing the particular appliance classification type, and (iii) the power status associated with the appliance comprises:

transmitting, using a radio transmitter, (i) the appliance identifier associated with the appliance, (ii) the information describing the particular appliance classification type, and (iii) the power status associated with the appliance in a single message.

15. The method of claim 11 , comprising:

determining an average amount of power used by the appliance over a period of time; and,

transmitting the determined average amount of power using the radio transmitter.

16. The method of claim 11 , wherein the appliance is a hair dryer, a clothes iron, a curling iron, a television, an electric space heater or a refrigerator.

17. The method of claim 11 , wherein the transmitted information describing the appliance classification type, when received and processed by a user device, is configured to cause the user device to generate a graphical power indicator for output on a display of the user device.