Sensor data collection method and sensor device

A sensor data collection method for a sensor device including a wireless communication circuit, a memory, a clock circuit and a buffer, the method comprising:

• determining whether or not the sensor device is connected to a receiver by referring to session information managed by the wireless communication circuit;
• when it is determined that the sensor device is connected to the receiver, wirelessly transmitting data to the receiver without storing the data in the memory;
• when it is determined that communication with the receiver is disconnected on the basis of the session information and that the disconnection is not caused by reception of a disconnect packet from the receiver, receiving data from the buffer in a format for transmitting to the receiver and storing the data in the memory in a specific order for each predetermined data unit;
• and
• storing time information acquired from the clock circuit in the memory in association with the data stored in the memory.

A sensor device comprising:

• a wireless communication circuit configured to perform communication with a receiver;
• a memory for storing data to be transmitted to the receiver;
• a clock circuit configured to measure time;
• and
• an MPU configured to:
• determine whether or not the sensor device is connected to a receiver by referring to session information managed by the wireless communication circuit,
• when determining that the sensor device is connected to the receiver on the basis of session information managed by the wireless communication circuit, wirelessly transmit data to the receiver via the wireless communication circuit in real time without storing the data to be transmitted to the receiver in the memory, and
• when determining that communication with the receiver is disconnected on the basis of the session information and that the disconnection is not caused by reception of a disconnect packet from the receiver, receive data from a buffer in a format for transmitting to the receiver and store the data and time information acquired from the clock circuit in the memory in association with the data.

A non-transitory computer-readable storage medium storing instructions that, when executed by a processor of a sensor device, cause the processor to perform operations comprising:

• monitoring session information managed by a wireless communication circuit of the sensor device to determine a connection status with a receiver;
• when the connection status indicates the sensor device is connected to the receiver, controlling the sensor device to wirelessly transmit sensor data to the receiver in real time without storing the sensor data in a memory of the sensor device;
• when the connection status indicates communication with the receiver is disconnected and the disconnection is not caused by reception of a disconnect packet from the receiver, controlling the sensor device to store the sensor data in the memory in predetermined data blocks, each data block comprising a specific number of data elements arranged in a specific order;
• and
• associating time information obtained from a clock circuit of the sensor device with the sensor data stored in the memory.