2.0.1

Fixed issue where listing of multi-line SMSs didn't work.

2.0.0

Asynchronous implementation.
Accepting stream as input/output to make it more generic.
Maintenance.

v1.0.0

Added support for D-Link DWM-222 and TP-LINK MA260.
Multiple refactorings.

v0.0.8

Modem implements IModem.
Refactoring.

v0.0.7

Rewritten parser that works much better.

Features:

Send SMS
Answer incoming call
Hang up call
Get SIM status
Enter SIM PIN
Get remaining PIN & PUK attempts
Get product information
Get battery status
Get signal strength
Disable echo

Tested on Adafruit FONA 3G which uses SIMCOM SIM5320 baseband module.