Package at is a framework for communication with AT-compatible devices like Huawei modems via serial port. Currently this package is well-suited for Huawei devices and since AT-commands set may vary from device to device, sometimes you'll be forced to implement some logic by yourself. This framework includes facilities for device monitoring, sending and receiving AT-commands, encoding and decoding SMS messages from or to PDU octet representation (as specified in 3GPP TS 23.040). An example of incoming SMS monitor application is given. In order to introduce your own logic (i.e. custom modem Init function), you should derive your profile from the default DeviceProfile and override its methods. Project page: https://github.com/xlab/at