#include "Arduino.h"
#define USB SerialUSB
#define UBLOX Serial1


// Pin to turn on/off the nb-iot module
#define powerPin 7
#define commands 17

String atcommands[commands] = {  "ATE0",
                                "AT+URAT=7",
                                "AT+URAT?",
                                "AT+CMEE=2",
                                "AT+CGDCONT=1,\"IP\",\"internet.m2m\"",
                                "AT+CGDCONT?",
                                "AT+CFUN=1",
                                "AT+COPS=1,2,\"20408\"",
                                "AT+CSQ",
                                "AT+CREG=2",
                                "AT+CREG?",
                                "AT+CGPADDR",
                                "AT+CMGF=1",
                                "AT+CMGL",
                                "AT+USOCR=17",
                                "AT+USOST=0,\"YOURIP\",YOURPORT,4,\"Data\"",
                                "AT+USOCL=0"




                              };
int pos = 0;


void setup()
{
  // Turn the nb-iot module on
  //pinMode(powerPin, OUTPUT);
  //digitalWrite(powerPin, HIGH);
  pinMode(SARA_ENABLE,       OUTPUT);
  pinMode(SARA_TX_ENABLE,       OUTPUT);
  digitalWrite(SARA_ENABLE, HIGH);       // enable power to ublox
  digitalWrite(SARA_TX_ENABLE, HIGH);
  pinMode(SARA_R4XX_TOGGLE, OUTPUT);
  digitalWrite(SARA_R4XX_TOGGLE, LOW);



  // Start communication
  USB.begin(115200);
  UBLOX.begin(115200);  //ublox should always be 9600
  delay(4000);
  USB.println("type an AT command or type m for Menu of commands");
  delay(1000);
  //clear UBLOX buffer
  while (UBLOX.available()) {
    UBLOX.read();
  }
}

void loop()
{
  int len = 160; // allow commands up to 160 characters
  char buffer[len];
  int commandFound = 0;
  if (USB.available())
  {
    uint8_t c = USB.read();
    if (pos == 0 && c == 'm')
    {
      for (int x = 0 ; x < commands ; x++) {
        USB.print(x + 1);
        if (x < 9) {
          USB.print("   ");
        } else
        {
          USB.print("  ");
        }
        USB.println(atcommands[x]);
      }
      USB.println("you can use one of the above shortcodes, just type the number and press enter");
      buffer[0] = 0;
    } else
    {
      switch (c) {
        case '\n': // Ignore new-lines
          break;
        case '\r': // Return on CR
          commandFound = 1;
          break;
        default:
          USB.write(c);   //display what is typed
          if (pos < len - 1) {
            buffer[pos++] = c;
            buffer[pos] = 0;
          }

      }
      if (commandFound ) {
        String inputline(buffer);
        int menuchoice = inputline.toInt();
        USB.println();
        if (menuchoice > 0) {
          inputline = atcommands[menuchoice - 1];
          USB.println(inputline);
        }
        UBLOX.println(inputline);
        commandFound = 0;
        pos = 0;
      }
    }
  }
  while (UBLOX.available())
  {
    USB.write(UBLOX.read());
  }

}