Wireless alert device, communication device and alert method

A communication device comprising:

• a processor;
• a second wireless communication module that pairs the communication device with a wireless alert device having a first wireless communication module and establishes a connection between the communication device and the wireless alert device;
• a second alert unit storing computerized instructions that are executed by the processor to perform operations of:
• calculating a received signal strength indication (RSSI) value of a wireless signal that is emitted by the wireless alert device and received by a second antenna unit of the communication device;
• determining whether a distance between the wireless alert device and the communication device exceeds a preset distance by determining whether the RSSI value of the received wireless signal is less than a preset value;
• and
• informing users of the wireless alert device and the communication device that the distance between the wireless alert device and the communication device exceeds the preset distance by activating an output device of the communication device to output alert information when the RSSI value of the received wireless signal is less than the preset value.

An alert method being executed by a microprocessor unit of a wireless alert device, the wireless alert device having been paired with a communication device and a connection between the wireless alert device and the communication device having been established, the method comprising:

• calculating a received signal strength indication (RSSI) value of a wireless signal that is emitted by the communication device and received by a first antenna unit of the wireless alert device;
• determining whether a distance between the wireless alert device and the communication device exceeds a preset distance by determining whether the RSSI value of the received wireless signal is less than a preset value;
• and
• informing users of the wireless alert device and the communication device that the distance between the wireless alert device and the communication device exceeds the preset distance by activating an alarm device of the wireless alert device to send out an alarm when the RSSI value of the received wireless signal is less than the preset value.

An alert method being executed by a processor unit of a communication device, the communication device having been paired with a wireless alert device and a connection between the wireless alert device and the communication device having been established, the method comprising:

• calculating a received signal strength indication (RSSI) value of a wireless signal that is emitted by the wireless alert device and received by a second antenna unit of the communication device;
• determining whether a distance between the wireless alert device and the communication device exceeds a preset distance by determining whether the RSSI value of the received wireless signal is less than a preset value;
• and
• informing users of the wireless alert device and the communication device that the distance between the wireless alert device and the communication device exceeds the preset distance by activating an output device of the communication device to output alert information when the RSSI value of the received wireless signal is less than the preset value.