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+====== SDK Script dio-monitor.are ======
+<code c dio-monitor.are>
+/* DESC: This script monitors the DIO ports and sends a SMS to the specified phone number.
+ * Copyright (C) 2012 NetModule AG, Switzerland
+ */
+void usage()
+{
+    print("dio-monitor.are <din> <tel>\n");
+    print("  din:  digital input [in1|in2]\n");
+    print("  tel:  telephone number to send the SMS to\n");
+    exit(1);
+}
+void sendsms(tel, msg)
+{
+    id = nb_sms_send(tel, msg);
+    if (id) {
+        printf("Successfully spooled SMS (ID %s) to '%s'.\n", id, tel);
+    } else {
+        print("Unable to send SMS to '%s'.\n", tel);
+    }
+}
+if (argc != 3) {
+    usage();
+}
+din = argv[1];
+tel = argv[2];
+in1 = nb_dio_get("in1");
+in2 = nb_dio_get("in2");
+while (1) {
+    if (left(din,4) == "in1") {
+        cin1 = nb_dio_get("in1");
+        if (cin1 != in1) {
+            msg = sprintf("Digital input state of '%s' has changed from %d to %d\n", din, in1, cin1);
+            sendsms(tel, msg);
+            in1 = cin1;
+        }
+    }
+    if (left(din,4) == "in2") {
+        cin2 = nb_dio_get("in2");
+        if (cin2 != in2) {
+            msg = sprintf("Digital input state of '%s' has changed from %d to %d\n", din, in2, cin2);
+            sendsms(tel, msg);
+            in2 = cin2;
+        }
+    }
+    sleep(3);
+}
+exit(0);
+</code>