Systems and methods for a weapon detector

1. A method performed by a detector for detecting at least one of removal and insertion of a firearm into and from a holster, the method comprising:

responsive to detecting a first activation of a control, entering a test mode;

responsive to detecting a third activation of the control, entering a reset mode;

while in the test mode:

detecting a first characteristic of a signal provided by a sensor that indicates insertion of the firearm in the holster;

detecting a second characteristic of the signal provided by the sensor that indicates removal of the firearm from the holster; and

responsive to detecting a second activation of the control, entering a field mode;

while in the field mode:

responsive to detecting the second characteristic of the signal provided by the sensor, transmitting a message; and

while in the reset mode:

resetting an operation of the detector; and

entering the test mode.

2. The method of claim 1 further comprising:

while in the test mode: responsive to detecting the second characteristic, activating an indicator.

3. The method of claim 1 further comprising:

while in the test mode: responsive to detecting the first characteristic, activating an indicator.

4. The method of claim 1 wherein the first activation comprises a single press activation.

5. The method of claim 1 wherein the second activation comprises a long press activation.

6. The method of claim 1 wherein:

the second activation comprises a long press activation;

the third activation comprises a longer press activation; and

the control is operated for a longer period of time during the longer press activation than the long press activation.

7. The method of claim 1 further comprising:

while in the test mode: responsive to detecting a fourth activation of the control, entering a calibration mode; and

while in the calibration mode:

determining the first characteristic of the signal provided by he sensor that indicates insertion of the firearm in the holster;

determining the second characteristic of the signal provided by the sensor that indicates removal of the firearm from the holster; and

entering the test mode.

8. The method of claim 7 wherein the fourth activation comprises a double press activation.

9. The method of claim 7 wherein determining the first characteristic comprises determining a magnitude of at least one of an inductance and an impedance that indicates that the firearm is positioned in the holster.

10. The method of claim 7 wherein determining the second characteristic comprises determining a magnitude of at least one of an inductance and an impedance that indicates that the firearm is positioned out of the holster.

11. The method of claim 1 further comprising:

responsive to detecting a fifth activation of the control, entering a rollback mode; and

while in the rollback mode:

selecting for execution a previous version of software of the detector; and

entering the reset mode.

12. The method of claim 11 wherein the fifth activation comprises a very long press activation.

13. A method performed by a detector for detecting removal of a firearm from a holster, the detector includes a communication circuit, a sensor circuit, and a control, the method comprising:

while operating in a field mode:

responsive to detecting a first signal, transmitting a message, the message having a mute bit set to a first value of zero, the sensor circuit provides the first signal in response to detecting removal of the firearm from the holster, the communication circuit transmits the message; and

responsive to detecting activation of the control, entering a mute mode, the control manually operated by a user; and

while operating in the mute mode:

responsive to detecting the first signal, transmitting all the message, the message having the mute bit set to a second value of one, the communication circuit transmits the message; and

responsive to detecting expiration of a duration of time, entering the field mode.

14. The method of claim 13 wherein detecting removal of the firearm comprises detecting a change in a magnitude of an impedance of a circuit.

15. The method of claim 13 wherein detecting activation of the control comprises detecting operation of a button.

16. The method of claim 13 wherein detecting expiration of the duration of time comprises counting down a timer.

17. The method of claim 13 wherein transmitting the message comprises transmitting the message wirelessly.

18. The method of claim 13 wherein:

while in the field mode: transmitting the message comprises transmitting one or more messages, each message has the mute bit set to the first value; and

while in the mute mode: transmitting the message comprises transmitting one or more messages, each message has the mute bit set to the second value.