JP2015012423A - Short-range radio communication apparatus, antenna state notification method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a short-range radio communication apparatus that does not impair design and is able to prevent the positional deviation of an antenna as much as possible.SOLUTION: In a short-range radio communication apparatus 50 comprising short-range radio communication means 60, the short-range radio communication means 60 is provided with an antenna voltage measuring unit 62 for measuring voltage generated at an antenna 66 of the short-range radio communication means 60. The short-range radio communication apparatus 50 gives notice of the state of the antenna 66 of the short-range radio communication means 60 on the basis of output from the antenna voltage measuring unit 62 by notification means 72, 73, 75, 76, and thereby makes it easy to maintain the state of the antennas adequately at the time of execution of short-range radio communication.

Description

  The present invention relates to a short-range wireless communication device, an antenna state notification method, and a program.

In recent years, near field communication such as NFC (Near Field Communication) has become widespread. This NFC is an international standard wireless communication technology defined by ISO (International Organization for Standardization) as a standard for contactless IC card interface, and it will be used for various applications in a short communication distance of several centimeters. It is expected to be.
However, when this short-range wireless communication is actually used, it can be seen that it is difficult for the NFC-equipped terminal to recognize the NFC tag. This is because NFC is short-range wireless communication, and the positions of both antennas are not fixed, and the communication environment changes depending on the antenna position, shape, size, sensitivity, and the like.
On the other hand, since it takes time to process data even if it can communicate as RF, the user may shift the position of the NFC-equipped terminal during communication, and the communication may be cut off in the middle. In particular, when performing tunnel communication with a device equipped with an NFC tag LSI, communication of several tens of kilobytes or more may be performed. In this case, the communication time is several minutes, it is difficult to fix the position of the NFC-equipped terminal, and there is a high possibility that the communication is cut off halfway.
Therefore, conventionally, a technique has been proposed in which a locking member that suppresses misalignment with other devices is provided on the surface of the casing near the antenna (for example, Patent Document 1).

JP 2010-28285 A

However, as in the technique of the above-mentioned Patent Document 1, if a locking member that suppresses misalignment with other devices is provided on the surface of the casing in the vicinity of the antenna, the design of the casing may be impaired. There's a problem.
The present invention has been made in view of such problems, and there is provided a short-range wireless communication device, an antenna state notification method, and a program that do not impair the design and can prevent the displacement of the antenna as much as possible. The purpose is to provide.

  The present invention is a short-range wireless communication device including a short-range wireless communication unit, and an antenna voltage measurement unit that measures a voltage generated in an antenna of the short-range wireless communication unit is provided in the short-range wireless communication unit. And a notifying means for notifying the state of the antenna based on the output from the antenna voltage measuring section.

  According to the present invention, when performing short-range wireless communication, the antenna voltage measurement unit of the short-range wireless communication unit measures the voltage generated in the antenna of the short-range wireless communication unit, and the antenna state (for example, Since the notification means notifies whether the antenna is appropriate or not, it is easy to appropriately maintain the antenna state when performing short-range wireless communication.

FIG. 1 is a block diagram illustrating a short-range wireless communication system according to an embodiment. FIG. 2 is a diagram showing a configuration of the logic of FIG. FIG. 3 is a diagram showing the configuration of the host device of FIG. FIG. 4 is a flowchart illustrating an example of the notification process. FIG. 5 is a flowchart illustrating another example of the notification process. FIG. 6 is a flowchart illustrating still another example of the notification process.

[First Embodiment]
The communication system shown in FIG. 1 includes an NFC-equipped device 10 and an NFC-equipped device 50. Among these, the NFC-equipped device 10 is configured to function as a reader / writer. On the other hand, the NFC-equipped device 50 includes an NFC tag 60 and a device main body 70 on which the NFC tag 60 is mounted. The NFC tag 60 includes an RF unit 61, an RSSI unit 62, a logic 63, a RAM 64, and an interface unit 65.

  On the transmitting side, the RF unit 61 modulates the packet data to be transmitted received from the logic 63 into a radio frequency signal in a predetermined frequency band, and causes the antenna 66 to transmit the modulated data. On the receiving side, the RF unit 61 receives the transmitted packet data by the antenna 66, amplifies and demodulates the packet data, and outputs it to the logic 63 or the like.

  The RSSI unit 62 is a circuit (signal strength measuring circuit) that outputs a voltage corresponding to the strength of the input signal to the antenna 66 of the NFC tag 60. That is, the RSSI unit 62 constitutes an antenna voltage measurement unit, and outputs a value corresponding to the strength of the input signal to the antenna 66 to the logic 63.

  As shown in FIG. 2, the logic 63 includes a control circuit 63a and an encryption circuit 63b.

  The device main body 70 includes a host device 71. As shown in FIG. 3, the host device 71 includes a CPU 71a, a system memory 71b, an external memory 71c, and a host controller 71d. The CPU 71a, the system memory 71b, the external memory 71c, and the host controller 71d are connected via a system bus. The host device 71 is connected to a light emitting device 72, a display device 73, an input device 74, a sound output device 75, and a vibration device 76.

  The CPU 71a controls information processing in the host device 71, and executes an antenna state notification processing program stored in the system memory 71b and other programs for realizing essential functions of the device main body 70.

  The system memory 71b is configured by, for example, a RAM (Random Access Memory). The external memory 71c is configured by, for example, a hard disk device or an optical disk device. The external memory may store text data, audio data, moving image data, and the like.

  The host controller 71 d is used for connecting the NFC tag 60 to the host device 71. Then, the host controller 71d outputs a signal or data output from the CPU 71a to the NFC tag 60, and outputs a signal or data output from the NFC tag 60 to the CPU 71a or the system memory 71b.

  The light emitting device 72 is composed of an LED (Light Emitting Diode) or the like, the display device 73 is composed of an LCD (Liquid Crystal Display) or the like, the input device 74 is composed of various keys or the like, and the sound output device 75 includes a speaker or the like. The vibration device 76 is composed of a vibration motor.

  In this embodiment, at least one of the light emitting device 72, the display device 73, the sound output device 75, and the vibration device 76 is used to notify the user of the antenna state (for example, the suitability of the antenna position) during short-range wireless communication. To do. Therefore, the present embodiment is not limited to an NFC-equipped device including all of the light emitting device 72, the display device 73, the sound output device 75, and the vibration device 76, and can be applied to any NFC-equipped device including at least one of them. It is.

  In the NFC-equipped device 50 having such a configuration, since the NFC tag 60 is connected to the host device 71, the RF communication mode, which is communication between the NFC-equipped device 10 and the NFC tag 60, the NFC tag 60 and the host controller. A serial communication mode that is communication with 71d and a tunnel communication mode that is communication between the NFC-equipped device 10 and the host controller 71d can be realized.

  The RF communication mode is realized by an application of the NFC-equipped device 10. In this mode, communication between the NFC-equipped device 10 and the NFC tag 60 is performed, and the NFC-equipped device 10 accesses the RAM 64 built in the NFC tag 60. In this case, an RF communication command is transmitted from the NFC-equipped device 10 to the NFC tag 60, the NFC tag 60 performs command processing, and transmits a processing result to the NFC-equipped device 10 as an RF communication mode response.

  The serial communication mode is realized by software in which the host controller 71d of the host device 71 controls the NFC tag 60. In this mode, communication between the NFC tag 60 and the host controller 71d is performed. In this case, the host controller 71d supplies power to the NFC tag, and transmits a serial communication command from the host controller 71d to the NFC tag 60. The NFC tag 60 performs command processing and sends the processing result to the host controller 71d in the serial communication mode. Send as a response.

  The tunnel communication mode is realized by software that controls the NFC tag 60 by the application of the NFC-equipped device 10 and the host controller 71 d of the host device 71. In this mode, communication between the NFC-equipped device 10 and the host controller 71d is performed. In this case, a tunnel communication mode command is transmitted from the NFC-equipped device 10 to the NFC tag 60, and the NFC tag 60 sends an IRQ (interrupt) notification to the host. The host controller 71 d applies a voltage to the NFC tag 60 when no voltage is applied to the NFC tag 60. Thereafter, the host controller 71d transmits an inquiry command to the NFC tag 60, and the NFC tag 60 transmits an inquiry response to the host controller 71d. The host controller 71d transmits a result notification command to the NFC tag 60. The NFC tag 60 transmits a result notification response to the host controller 71d, and then transmits the content of the result notification command to the NFC-equipped device 10 as a tunnel communication mode response. To do.

  In this embodiment, for example, in the RF communication mode and the tunnel communication mode among the communication modes performed in this way, the output (voltage signal) from the RSSI unit 62 is monitored, and the user is notified of the suitability of the antenna position. It was decided to do. That is, in the RF communication mode and the tunnel communication mode, a voltage is generated in the antenna 66 of the NFC tag 60 as a signal is received from the NFC-equipped device 10. Therefore, this voltage is measured by the RSSI unit 62, the suitability of the antenna position is determined based on the amplitude of the voltage signal, and the result is notified in a form that the user can recognize with the five senses.

  Next, the notification method will be described. The notification method is roughly classified as follows: (1) The notification is continuously performed only during signal reception, and the notification is performed according to the situation of the antenna position. (2) Notification is performed continuously or periodically while receiving a signal regardless of whether it is intermittent or continuous, and at that time, depending on the status of the antenna position (3) Notification is made continuously while receiving a signal regardless of whether it is intermittent or continuous, and at that time, the status of the antenna position is notified numerically. .

FIG. 4 is a flowchart showing the flow of notification processing when the notification (1) is performed. The flow of the notification process will be described based on this flowchart as follows. This notification process is executed only when power is transmitted from the NFC-equipped device 10. In this case, the logic 63 of the NFC tag 60 functions as an antenna state determination unit, and the CPU 71a functions as a notification unit control unit.
First, although the same type of notification is used for the case where the CPU antenna position is appropriate and the case where the CPU antenna position is inappropriate, a setting for changing the notification mode is made.
When the output signal (voltage signal) from the RSSI unit 62 is input to the logic 63, the logic 63 determines whether or not the amplitude of the voltage is greater than or equal to a threshold value (step S1), and the result is sent to the CPU 71a. The CPU 71a performs notification 1 processing (step S2A) if it is equal to or greater than the threshold value (in the case of YES in step S1). Processing is performed (step S2B).

FIG. 5 is a flowchart showing a notification process when the notification (2) is performed. The flow of the notification process will be described based on this flowchart as follows. This notification process is executed by, for example, a timer interrupt. In the case of this timer interruption, the notification process is executed by the CPU 71a. In this case, the CPU 71a functions as an antenna state determination unit and a notification unit control unit.
Also in this case, the monitor interval is set to be equal to or less than the signal width of the polling signal. This is because the polling signal can be reliably monitored even during intermittent reception, such as during reception of a polling signal. In addition, although the same type of notification is used when the antenna position is appropriate and when the antenna position is inappropriate, settings are made so as to change the mode of notification.
When the output signal (voltage signal) from the RSSI unit 62 is input to the CPU 71a (YES in step S11), the CPU 71a determines whether the amplitude of the voltage is equal to or greater than a threshold (step S12). If it is equal to or greater than the threshold (YES in step S12), the notification 3 is processed continuously or periodically (step S13A). If it is less than the threshold, what is the notification 3 continuously or periodically? The notification 4 having a different aspect is processed (step S13B). When the output signal (voltage signal) from the RSSI unit 62 is not input to the CPU 71a (NO in step S11), the CPU 71a determines whether or not the polling period has elapsed (step S14), and the polling period does not elapse. In this case (NO in step S14), an interrupt return is made. On the other hand, if the polling period or more has elapsed in step S14 (YES in step S14), it is determined whether or not already in the notification state (step S15), and if already in the notification state (YES in step S15). Cancels the notification state (step S16) and sets it as an interrupt return. In step S15, if it is not already in the notification state (NO in step S15), an interrupt return is made.

FIG. 6 is a flowchart showing a notification process when the notification (3) is performed. The flow of the notification process will be described based on this flowchart as follows. This notification process is executed by, for example, a timer interrupt. In the case of this timer interruption, the notification process is executed by the CPU 71a. In this case, the CPU 71a functions as an antenna state determination unit and a notification unit control unit.
First, the monitor interval is set to be equal to or smaller than the signal width of the polling signal. In addition, a setting is made so as to sequentially notify the level indicating the state of the antenna.
When the output signal (voltage signal) from the RSSI unit 62 is input to the CPU 71a (YES in step S21), the CPU 71a sequentially notifies the amplitude of the voltage (step S22). When the output signal (voltage signal) from the RSSI unit 62 is not input to the CPU 71a (NO in step S21), the CPU 71a determines whether or not the polling period has elapsed (step S23), and the polling period does not elapse. In this case (NO in step S23), an interrupt return is made. On the other hand, when the polling period or more has elapsed in step S23 (YES in step S23), it is determined whether or not already in the notification state (step S24), and if already in the notification state (YES in step S24). Cancels the notification state (step S25) and sets it as an interrupt return. In step S24, if it is not already in the notification state (NO in step S24), an interrupt return is made.

  Specifically, the above notification is realized by one or a combination of sound output by the sound output device 75, lighting of light by the light emitting device 72, display by the display device 73, and vibration by the vibration device 76. Therefore, the following description is divided into sound notification, light notification, display notification, and vibration notification.

1. Notification by sound (1) Notification by sound level (notification by continuous sound only during signal reception)
According to the flow of the flowchart shown in FIG. 4, a sound is continuously output while receiving any signal, and when there is no signal during a period between polling, the sound is muted and a sound is output. In the meantime, a high tone is output when the amplitude of the signal is equal to or greater than the threshold, and a low tone is output when the signal amplitude is smaller than the threshold.

(Notification by continuous sound)
According to the flow of the flowchart shown in FIG. 5, while receiving any signal, the sound is continuously output regardless of the intermittent reception operation or the continuous reception operation, and the signal amplitude is increased during the sound output. When it is above the threshold, a high tone is output.

(Notification by regular sound)
According to the flow of the flowchart shown in FIG. 5, sound is continuously output regardless of intermittent reception operation or continuous reception operation while receiving any signal. Further, while the sound is being output, a high tone is output if the amplitude of the signal is greater than or equal to the threshold value, and a low tone is output if the signal amplitude is smaller than the threshold value.

(2) Notification by sound level (notification by continuous sound only during signal reception)
According to the flow of the flowchart shown in FIG. 4, a sound is continuously output while any signal is received, and the sound is silenced when there is no signal as in the period between polling. Further, while the sound is being output, a loud sound is output if the amplitude of the signal is greater than or equal to the threshold value, and a small sound is output if the signal amplitude is smaller than the threshold value.

(Notification by continuous sound)
According to the flow of the flowchart shown in FIG. 5, sound is continuously output regardless of intermittent reception operation or continuous reception operation while receiving any signal. Further, while the sound is being output, a loud sound is output if the amplitude of the signal is greater than or equal to the threshold value, and a small sound is output if the signal amplitude is smaller than the threshold value.

(Notification by regular sound)
According to the flow of the flowchart shown in FIG. 5, sound is continuously output regardless of intermittent reception operation or continuous reception operation while receiving any signal. Further, while the sound is being output, a loud sound is output if the amplitude of the signal is greater than or equal to the threshold value, and a small sound is output if the signal amplitude is smaller than the threshold value.

(3) Notification according to the length of the sound output interval According to the flow of the flowchart shown in FIG. 5, while receiving any signal, a sound is output at a predetermined interval regardless of intermittent reception operation or continuous reception operation. Furthermore, while the sound is being output, the sound is output at a short interval if the amplitude of the signal is equal to or greater than the threshold value, and the sound is output at a long interval if it is smaller than the threshold value.

2. Notification by light (1) Notification by blinking light (notification by lighting only during signal reception)
According to the flow of the flowchart shown in FIG. 4, the light is turned on while any signal is received, and the light is turned off when there is no signal as in the period between polling. Further, during light emission, the light color is green when the signal amplitude is greater than or equal to the threshold value, and the light color is red when the signal amplitude is smaller than the threshold value.

(Notification by continuous lighting)
According to the flow of the flowchart shown in FIG. 5, while receiving any signal, the light is continuously lit regardless of the intermittent reception operation or the continuous reception operation. Further, during light emission, the light color is green when the signal amplitude is greater than or equal to the threshold value, and the light color is red when the signal amplitude is smaller than the threshold value.

(Notification by regular lighting)
According to the flow of the flowchart shown in FIG. 5, while receiving any signal, the light is periodically turned on regardless of the intermittent reception operation or the continuous reception operation. Further, during light emission, the light color is green when the signal amplitude is greater than or equal to the threshold value, and the light color is red when the signal amplitude is smaller than the threshold value.

(2) Notification by light intensity (notification by continuous lighting only during signal reception)
According to the flow of the flowchart shown in FIG. 4, the light is turned on while any signal is received, and the light is turned off when there is no signal as in the period between polling. Further, while the light is emitted, the magnitude of the light is increased if the amplitude of the signal is greater than or equal to the threshold, and the magnitude of the light is decreased if it is smaller than the threshold.

(Notification by continuous lighting)
According to the flow of the flowchart shown in FIG. 5, while receiving any signal, the light is continuously lit regardless of the intermittent reception operation or the continuous reception operation. Further, while the light is emitted, the magnitude of the light is increased if the amplitude of the signal is greater than or equal to the threshold, and the magnitude of the light is decreased if it is smaller than the threshold.

(Notification by regular lighting)
According to the flow of the flowchart shown in FIG. 5, while receiving any signal, the light is periodically turned on regardless of the intermittent reception operation or the continuous reception operation. Further, during light emission, the light color is green when the signal amplitude is greater than or equal to the threshold value, and the light color is red when the signal amplitude is smaller than the threshold value.

(3) Notification by the length of the lighting interval According to the flow of the flowchart shown in FIG. 5, while receiving any signal, the light is turned on at a predetermined interval regardless of the intermittent reception operation or the continuous reception operation. Further, while the light is lit, the light is turned on at short intervals if the signal amplitude is greater than or equal to the threshold value, and the light is turned on at long intervals if the signal amplitude is smaller than the threshold value.

3. Notification by display (1) Notification by numerical display While receiving any signal, a numerical value corresponding to the voltage level is displayed regardless of intermittent reception operation or continuous reception operation according to the flow of the flowchart shown in FIG.

(2) Notification by changing expression of animal or character According to the flow of the flowchart shown in FIG. 5, while receiving any signal, the animal or character is displayed regardless of the intermittent reception operation or the continuous reception operation. Further, while the animal or character is being displayed, if the signal amplitude is greater than or equal to the threshold, the expression of the animal or character is a smile, and if it is less than the threshold, the expression of the animal or character is a crying face.

4). Notification by frequency change of vibration The NFC-equipped device 50 is vibrated while receiving any signal according to the flow of the flowchart shown in FIG. Further, during vibration, if the amplitude of the signal is greater than or equal to the threshold value, the vibration is made finer, and if it is smaller than the threshold value, the vibration is made rougher.

As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, A various deformation | transformation is possible in the range which does not deviate from the summary.
For example, in the above embodiment, the notification process is changed depending on whether the output signal (voltage signal) from the RSSI unit 62 is equal to or greater than the threshold value or less than the threshold value, but in proportion to the output signal (voltage signal), for example, The sound level to be notified, the magnitude of the sound, or the interval of the sound output, the lighting size, the lighting color, or the lighting interval may be changed. Even in this case, it is possible to notify not only continuously during signal reception but also continuously or periodically while receiving a signal regardless of whether it is intermittent or continuous. However, when receiving a signal continuously or periodically while receiving a signal regardless of whether it is intermittent or continuous, for example, when receiving a signal intermittently, the next signal is received. In the meantime, notification according to the amplitude of the last received signal is preferably performed.
Moreover, in the said embodiment, the propriety of an antenna position is used using the notification means of the NFC mounting apparatus 50 provided with the NFC tag 60, ie, at least one of the light-emitting device 72, the display device 73, the sound output device 75, and the vibration device 76. However, while watching the state of the response from the NFC-equipped device 50, the notification is made using at least one of the light emitting device, display device, sound output device, and vibration device on the NFC-equipped device 10 side. It may be.
Further, in the case of the NFC-equipped device 50 including the NFC tag 60, communication in the P2P mode is possible. In this case, either one of the devices may notify or both devices may notify.

The invention described in the scope of claims attached to the application of this application will be added below.
The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.

[Appendix]
<Claim 1>
A short-range wireless communication device provided with short-range wireless communication means, wherein an antenna voltage measurement unit for measuring a voltage generated in an antenna of the short-range wireless communication means is provided in the short-range wireless communication means, and the antenna A short-range wireless communication device comprising: notification means for notifying the state of the antenna of the short-range wireless communication means based on an output from a voltage measuring unit.
<Claim 2>
An antenna state determining unit that determines an antenna state of the short-range wireless communication unit based on an output from the antenna voltage measuring unit, wherein the notification unit uses the antenna state determination unit as a notification of the antenna state. The short-range wireless communication device according to claim 1, wherein notification corresponding to the determination result is performed.
<Claim 3>
The notification means includes an audio output device, and notifies the state of the antenna by at least one of the level of sound output from the sound output device, the level of sound, or the interval of sound output. The short-range wireless communication device according to claim 1 or 2.
<Claim 4>
The said notification means is provided with the light-emitting device, The state of the said antenna is notified by at least one of the magnitude | size of lighting by the said light-emitting device, a lighting color, or the magnitude of a lighting interval, The Claim 1 or 2 characterized by the above-mentioned. Near field communication equipment.
<Claim 5>
The short distance according to claim 1, wherein the notification unit includes a display device and notifies the state of the antenna by displaying an output level from the antenna voltage measurement unit on the display device. Wireless communication equipment.
<Claim 6>
The short-range wireless communication device according to claim 1, wherein the notification unit includes a display device and notifies the state of the antenna by displaying an expression change of an animal or a character on the display device. .
<Claim 7>
The short-range wireless communication device according to claim 1, wherein the short-range wireless communication device is an NFC-equipped device.
<Claim 8>
An antenna state notification method for a short-range wireless communication device including a short-range wireless communication means,
An antenna voltage measuring step for measuring a voltage generated at the antenna of the short-range wireless communication means;
A notification step of notifying an antenna state based on the output of the antenna voltage measurement step;
A method for notifying an antenna state of a short-range wireless communication device, comprising:
<Claim 9>
A computer of a short-range wireless communication device equipped with a short-range wireless communication means,
Antenna voltage measuring means for measuring a voltage generated in the antenna of the short-range wireless communication means;
Notification means for notifying the state of the antenna of the short-range wireless communication means based on the output of the antenna voltage measurement means;
A program characterized by functioning as

10 NFC-equipped equipment 50 NFC-equipped equipment 60 NFC tag 62 RSSI part (antenna voltage measuring part)
72 Light emitting device (notification means)
73 Display device (notification means)
75 Sound output device (notification means)
76 Vibration device (notification means)

Claims (9)

  A short-range wireless communication device provided with short-range wireless communication means, wherein an antenna voltage measurement unit for measuring a voltage generated in an antenna of the short-range wireless communication means is provided in the short-range wireless communication means, and the antenna A short-range wireless communication device comprising: notification means for notifying the state of the antenna of the short-range wireless communication means based on an output from a voltage measuring unit.   An antenna state determining unit that determines an antenna state of the short-range wireless communication unit based on an output from the antenna voltage measuring unit, wherein the notification unit uses the antenna state determination unit as a notification of the antenna state. The short-range wireless communication device according to claim 1, wherein notification corresponding to the determination result is performed.   The notification means includes an audio output device, and notifies the state of the antenna by at least one of the level of sound output from the sound output device, the level of sound, or the interval of sound output. The short-range wireless communication device according to claim 1 or 2.   The said notification means is provided with the light-emitting device, The state of the said antenna is notified by at least one of the magnitude | size of lighting by the said light-emitting device, a lighting color, or the magnitude of a lighting interval, The Claim 1 or 2 characterized by the above-mentioned. Near field communication equipment.   The short distance according to claim 1, wherein the notification unit includes a display device and notifies the state of the antenna by displaying an output level from the antenna voltage measurement unit on the display device. Wireless communication equipment.   The short-range wireless communication device according to claim 1, wherein the notification unit includes a display device and notifies the state of the antenna by displaying an expression change of an animal or a character on the display device. .   The short-range wireless communication device according to claim 1, wherein the short-range wireless communication device is an NFC-equipped device. An antenna state notification method for a short-range wireless communication device including a short-range wireless communication means,
An antenna voltage measuring step for measuring a voltage generated at the antenna of the short-range wireless communication means;
A notification step of notifying an antenna state based on the output of the antenna voltage measurement step;
A method for notifying an antenna state of a short-range wireless communication device, comprising: A computer of a short-range wireless communication device equipped with a short-range wireless communication means,
Antenna voltage measuring means for measuring a voltage generated in the antenna of the short-range wireless communication means;
Notification means for notifying the state of the antenna of the short-range wireless communication means based on the output of the antenna voltage measurement means;
A program characterized by functioning as

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