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    What is the difference between the WBR3 and he WBR3D?
    Has the CBU module been certified to California SB327 standards?
    What is the difference between the CR3L module and the CR3L-N module?
    Does the WBR3 module support a baud rate of 115200 and how to switch the baud rate?
    Does the WBR3D module support Bluetooth mesh technology?
    How do the GPIO pins of the T2-U development board correspond to the BK7231N chip?
    How to disable the WBR3 module from automatically entering low power mode?
    Is there a 5G module that is pin-to-pin compatible with the WBR3 module?
    Has the CB3L module been EOL?
    Does the CBU module support local area network multi-module networking?

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