Gets the status of the last GSM SMS command.
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.
The text of the 86Duino reference is a modification of the Arduino reference, and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.