How to check the battery level of the audio or BlueTooth version VP3300 reader?

Step-by-step guide

There is a "read battery level command" you can issue to the reader to check the battery status.  

Please issue the get battery Level command F0-02 to get the status. If the data level >= 0xD2 indicates the Battery power full. if data level <= 0xC0 indicates Battery power low.

1. Connect the audio or BT VP3300 to a USB Port on the PC
2. Launch the USDK Demo and wait for the reader to be detected 
3. You can send the F0-02 command follow the numbered steps as shown in the screenshot below:
   
4. Check the response returned in the Log window for the battery level byte (#6 in the screenshot above). If the data level >= 0xD2 indicates the Battery power full. if data level <= 0xC0 indicates Battery power low.

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