Motorola G24 用户手册

This command is used to query the wakeup reason. 

Multiple wakeup reasons can be returned in the <bitmask>. The reason(s) for wakeup will be 
cleared once the AT+TWUR read command is issued, or if the G24 is powered off. The Wakeup 
Out line will be set to high once the AT+TWUR read command is issued.

Operation of this command is flex dependant.

See 

 for <bitmask> values.

The command will return the value 00 if issued when the Wakeup Out line is set to high.

This command controls the antenna switch mechanism. It is intended for use in automotive 
applications which include hardware support of two antennas; primary antenna for regular use, 
and secondary antenna for emergency use.

This command allows selecting the active antenna, or querying the currently selected active 
antenna. The setting will be persistent and maintained across power cycles.

Query Wakeup reason.