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Embodiments of systems and methods include a sensor subsystem (e.g., within a container-mounted device) that produces a sensor output, and a processing system that implements a state machine. Upon entry into a first state, the processing system starts a timer, and while in a second state, the proces

Embodiments of systems and methods include a sensor subsystem (e.g., within a container-mounted device) that produces a sensor output, and a processing system that implements a state machine. Upon entry into a first state, the processing system starts a timer, and while in a second state, the processing system waits for a specific sensor output value to be received. The processing system transitions from the first state to the second state upon expiration of the timer, and the processing system transitions from the second state to the first state when the sensor output corresponds to the specific sensor output value. When the state machine is in the second state, the output device produces a human-perceptible indicia configured to prompt a human user to perform an action that is likely to cause the sensor to produce the sensor output that corresponds to the specific sensor output value.

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1. A system comprising: a sensor subsystem configured to produce a sensor output indicating a value of a variable sensed condition selected from a motion, an orientation, a change in orientation, an acceleration, shock, a vibration, a magnetic field, a pressure, a temperature, a presence of a chemic

1. A system comprising: a sensor subsystem configured to produce a sensor output indicating a value of a variable sensed condition selected from a motion, an orientation, a change in orientation, an acceleration, shock, a vibration, a magnetic field, a pressure, a temperature, a presence of a chemical, an absence of a chemical, and a humidity level;a processing system that receives the sensor output and implements a state machine having a first state and a second state, wherein upon entry into the first state, the processing system starts a timer, and while in the second state, the processing system waits for a specific sensor output value to be received, and wherein the processing system transitions from the first state to the second state upon expiration of the timer, and the processing system transitions from the second state to the first state when the sensor output corresponds to the specific sensor output value; andan output device which, when the state machine is in the second state, produces a human-perceptible indicia configured to prompt a human user to perform an action that is likely to cause the sensor to produce the sensor output that corresponds to the specific sensor output value. 2. The system of claim 1, further comprising: a portable container;a container mounted device that includes the sensor subsystem and a first wireless communication interface, wherein the container mounted device is affixed to the portable container; anda user interface device that includes the processing system, the output device, and a second wireless communication interface,wherein the first wireless interface of the container mounted device communicates the sensor output to the second wireless interface of the user interface device via an air interface. 3. The system of claim 1, further comprising: a portable container; anda container mounted device that includes the sensor subsystem, the processing system, and the output device, wherein the container mounted device is affixed to the portable container. 4. The system of claim 1, further comprising: a container with a receptacle configured to hold items, wherein the container is configured to allow a liquid to enter the receptacle and contact the items when the receptacle is immersed in the liquid, and to allow the liquid to drain from the receptacle when the receptacle is removed from the liquid; anda container mounted device that includes the sensor subsystem, wherein the container mounted device is affixed to the portable container. 5. The system of claim 1, further comprising: a portable container configured to hold items, wherein the portable container is selected from a basket, a rack, a tray, a pan, and a pot; anda container mounted device that includes the sensor subsystem, wherein the container mounted device is affixed to the portable container. 6. The system of claim 1, wherein the output device includes one or more devices selected from a speaker, a light, a light emitting diode, a vibration-producing device, a display device, a computing device, a headset, display glasses, a pager, a telephone, and a radio. 7. The system of claim 1, wherein the output device is configured to produce a human-perceptible indicia selected from an audible tone, a spoken statement, a light, a vibration, and a displayed indicia. 8. A system comprising: a sensor subsystem configured to produce a sensor output indicating acceleration in at least one direction;a processing system that receives the sensor output and implements a state machine having a first state and a second state, wherein upon entry into the first state, the processing system starts a timer, and while in the second state, the processing system waits for a specific acceleration value to be received, and wherein the processing system transitions from the first state to the second state upon expiration of the timer, and the processing system transitions from the second state to the first state when the sensor output corresponds to the specific acceleration value; andan output device which, when the state machine is in the second state, produces a human-perceptible indicia configured to prompt a human user to perform an action that is likely to cause the sensor to produce the sensor output that corresponds to the specific acceleration value. 9. The system of claim 8, further comprising: a portable container configured to hold items, wherein the portable container is selected from a basket, a rack, a tray, a pan, and a pot; anda container mounted device that includes the sensor subsystem, wherein the container mounted device is affixed to the portable container, andwherein the human-perceptible indicia is configured to prompt the human user to move the portable container. 10. The system of claim 9, wherein the portable container is a basket configured to hold food and to allow the food to be immersed in a liquid. 11. The system of claim 8, further comprising: a portable container;a container mounted device that includes the sensor subsystem and a first wireless communication interface, wherein the container mounted device is affixed to the portable container; anda user interface device that includes the processing system, the output device, and a second wireless communication interface,wherein the first wireless interface of the container mounted device communicates the sensor output to the second wireless interface of the user interface device via an air interface. 12. The system of claim 8, further comprising: a portable container; anda container mounted device that includes the sensor subsystem, the processing system, and the output device, wherein the container mounted device is affixed to the portable container. 13. The system of claim 8, wherein the output device includes one or more devices selected from a speaker, a light, a light emitting diode, a vibration-producing device, a display device, a computing devices, headsets, display glasses, a pager, a telephone, and a radio. 14. The system of claim 8, wherein the output device is configured to produce a human-perceptible indicia selected from an audible tone, a spoken statement, a light, a vibration, and a displayed indicia. 15. A method comprising: producing, by a sensor, a sensor output indicating a value of a variable sensed condition selected from a motion, an orientation, a change in orientation, an acceleration, a shock, a vibration, a magnetic field, a pressure, a temperature, a presence of a chemical, an absence of a chemical, and a humidity level;transitioning into a first state of a state machine, wherein operation in the first state includes starting a timer and monitoring whether the timer has expired;upon expiration of the timer, transitioning into a second state, wherein operation in the second state includes monitoring the sensor output, determining whether a specific sensor output value has been received, and producing a human-perceptible indicia configured to prompt a human user to perform an action that is likely to cause the sensor to produce the sensor output that corresponds to the specific sensor output value. 16. The method of claim 15, further comprising: wirelessly communicating the sensor output to a remote user interface device, wherein the remote user interface device is configured to produce the human-perceptible indicia. 17. The method of claim 15, wherein producing the human-perceptible indicia comprises producing a human-perceptible indicia selected from an audible tone, a spoken statement, a light, a vibration, and a displayed indicia. 18. The method of claim 15, wherein the sensor is an accelerometer, and wherein: producing the sensor output comprises producing a sensor output indicating acceleration in at least one direction; andtransitioning into the first state comprises transitioning into the first state when the sensor output corresponds to a specific acceleration value. 19. The method of claim 18, wherein the accelerometer is affixed to a portable container, and wherein: producing the human-perceptible indicia comprises producing an indicia configured to prompt the human user to move the portable container. 20. The method of claim 15, further comprising: when the specific sensor output value has been received, transitioning from the second state to the first state.