//Directly in accordance with the contents of the implementation of AT commands: CEN666666# 57: AT+ CREG?// Parameters: paraptr = command code after the address of the parameters// return values: successful one, the failure of 0, at the same time generate serialmsg news// Function Description:// correct reply message: AT command to return to after the implementation of the contents of// error message back: password error or command error or parameter error

atcmd.c

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