The library carries generic command parser adopted for AT command based modules. 
Generic parser

Key functions:

• lteiot2_cmdSingle - Sends provided command to the module
• lteiot2_setHandler - Handler assignation to the provied command
• lteiot2_modulePower - Turn on module

Example description

The application is composed of three sections:

• System Initialization - Initializes all necessary GPIO pins, UART used for
  the communication with LTE IOT 2 module and UART used for information logging
• Application Initialization - Initializes driver, power on the module and sends few
  commands for the default module configuration
• Application Task Sends a message to Quectel NB-IoT test server(bit.ly/quectel-udp-server) every 5 sec.

This code snippet shows how generic parser should be properly initialized. Before initialization module must be turned on and add to that hardware flow control should be also 

Commands :
Command: ATI, product information
Command: AT+IPR=115200;&W, set baudrate 
Command: AT+QCFG="nbsibscramble",0, Enable scrambling
Command: AT+QCFG="band",0,0,80,1, set baud
Command: AT+QCFG="nwscanmode",3,1, Set LTE mode
Command: AT+QCFG="nwscanseq",030201,1, set priority NB1 > M1 > 2G
Command: AT+QCFG="iotopmode",1,1, select CAT-NB1
Command: AT+QCFG="servicedomain",1,1, Set PS domain
Command: AT+CGDCONT=1,"IP","internet", set APN provided
Command: AT+CFUN=1, Full functionality
Command: AT+COPS=1,2,"22001",0, set MCC and MNC provided
Command: AT+QIACT=1, activate PDP context
Command: AT+QIOPEN=1,0,"UDP","79.114.83.116",16666, create an UDP socket
Command: AT+QISENDEX=0,"48656C6C6F", Send message - Hello
 

void applicationInit()
{
// MODULE POWER ON
 lteiot2_hfcEnable( true );
 lteiot2_modulePower( true );

// MODULE INIT
 lteiot2_cmdSingle( &ATI[0] );
 lteiot2_cmdSingle( &AT_IPR[0] );
 lteiot2_cmdSingle( &AT_QCFG_1[0] );
 lteiot2_cmdSingle( &AT_QCFG_2[0] );
 lteiot2_cmdSingle( &AT_QCFG_3[0] );
 lteiot2_cmdSingle( &AT_QCFG_4[0] );
 lteiot2_cmdSingle( &AT_QCFG_5[0] );
 lteiot2_cmdSingle( &AT_QCFG_6[0] );
 lteiot2_cmdSingle( &AT_CGDCONT[0] );
 lteiot2_cmdSingle( &AT_CFUN[0] );
 lteiot2_cmdSingle( &AT_COPS[0] );
 lteiot2_cmdSingle( &AT_CGATT[0] );
 lteiot2_cmdSingle( &AT_CEREG[0] );
 lteiot2_cmdSingle( &AT_QIACT[0] );
 lteiot2_cmdSingle( &AT_QIOPEN[0] );
 lteiot2_cmdSingle( &AT_QISENDEX[0] );
}

Alongside with the demo application timer initialization functions are provided. Note that timer is configured acording to default development system and MCUs, changing the system or MCU may require an update of timer init and timer ISR functions.

Other MikroElektronika libraries used in the example:

• String
• Conversion

Additional notes and information

Depending on the development board you are using, you may need USB UART click, USB UART 2 clickor RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.