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MKRNB : NB_SMS class
Gets the status if the last NB_SMS command.
SMS.ready()
none
int
In asynchronous mode, ready() returns 0 if the last command is still executing, 1 if it was successful, and >1 if there is an error. In synchronous mode, it returns 1 if the previous successfully executed, and 0 if it has not.
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