Wireless tag processing device and method

A wireless tag processing device, comprising:

• a wireless tag reader-writer configured to communicate with a wireless tag;
• and
• a processor configured to:
• acquire a first list of parameter values and a second list of parameter values,
• control the wireless tag reader-writer to transmit a radio wave using the parameter values of the first list and acquire a first intensity of a response wave received from the wireless tag for each of the parameter values of the first list,
• when at least one of the first intensities satisfies a first predetermined condition, select the parameter values of the first list corresponding to the highest first intensity as a parameter value to be used by the wireless tag reader-writer, and
• when none of the first intensities satisfy the first predetermined condition, control the wireless tag reader-writer to transmit a radio wave using each of the parameter values of the second list and acquire a second intensity of a response wave from the wireless tag for each of the parameter values of the second list, and
• when at least one of the second intensities satisfies a second predetermined condition, select the parameter values of the second list corresponding to the highest second intensity as the parameter value to be used by the wireless tag reader-writer.