There should be a way to check attachment status

README.adoc

@@ -1,16 +1,15 @@
-// Define the repository information in these attributes
-:repository-owner: arduino-libraries
-:repository-name: MKRNB
+:repository-owner: marcus-peterson
+:repository-name: MKRNB_v2
 
-= {repository-name} Library for Arduino =
+= MKRNB_v2 Library for Arduino =
 
-image:https://github.com/{repository-owner}/{repository-name}/workflows/Compile%20Examples/badge.svg["Compile Examples Status", link="https://github.com/{repository-owner}/{repository-name}/actions?workflow=Compile+Examples"]
-image:https://github.com/{repository-owner}/{repository-name}/workflows/Spell%20Check/badge.svg["Spell Check Status", link="https://github.com/{repository-owner}/{repository-name}/actions?workflow=Spell+Check"]
+image:https://github.com/marcus-peterson/MKRNB_v2/workflows/Compile%20Examples/badge.svg["Compile Examples Status", link="https://github.com/marcus-peterson/MKRNB_v2/actions?workflow=Compile+Examples"]
+image:https://github.com/marcus-peterson/MKRNB_v2/workflows/Spell%20Check/badge.svg["Spell Check Status", link="https://github.com/marcus-peterson/MKRNB_v2/actions?workflow=Spell+Check"]
 
-This library enables an Arduino MKR NB 1500 board to connect to the internet over a NarrowBand IoT or LTE Cat M1 network. 
+This library enables an Arduino MKR NB 1500 board to connect to the internet over a NarrowBand IoT or LTE Cat M1 network. It is an extension of the original MKRNB library, designed to provide enhanced control and capabilities for commercial applications.
 
-For more information about this library please visit us at
-https://www.arduino.cc/en/Reference/{repository-name}
+For more information about the source of this library please visit the official Arduino MKRNB documentation
+https://www.arduino.cc/en/Reference/MKRNB
 
 == License ==
 

src/GPRS.cpp

@@ -162,6 +162,37 @@ int GPRS::ready()
   return ready;
 }
 
+//Check to see if the sim card that is inside the MKRNB is attached or detached to a LTE-M provideer
+NB_NetworkStatus_t GPRS::checkAttachmentStatus()
+{
+  MODEM.setResponseDataStorage(&_response);
+  MODEM.send("AT+CGATT?");
+  _state = GPRS_STATE_WAIT_CHECK_ATTACHED_RESPONSE;
+
+  int ready = 0;
+
+  while (ready == 0) {
+    ready = MODEM.ready();
+
+    if (ready > 1) {
+      _state = GPRS_STATE_IDLE;
+      _status = NB_ERROR;
+      break;
+    }
+
+    delay(500);
+  }
+
+  if (_response.indexOf("1,1") >= 0) {
+    _state = GPRS_STATE_IDLE;
+    return GPRS_READY;
+  } else {
+    _state = GPRS_STATE_IDLE;
+    return IDLE;
+  }
+}
+
+
 IPAddress GPRS::getIPAddress()
 {
   String response;

src/GPRS.h

@@ -63,6 +63,8 @@ class GPRS {
    */
   NB_NetworkStatus_t detachGPRS(bool synchronous = true);
 
+  NB_NetworkStatus_t checkAttachmentStatus();
+
   /** Get actual assigned IP address in IPAddress format
       @return IP address in IPAddress format
    */