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+====== SDK Script best-operator.are ======
+<code c best-operator.are>
+/* DESC: This script will scan for operators on startup and choose the one with the best signal
+ * Copyright (C) 2014 NetModule AG, Switzerland
+ *
+ */
+ME = argv[0];           /* script path */
+ARGV1 = argv[1];        /* 1st script argument */
+SCAN_INTERVAL = 30;     /* scan interval */
+REG_TIMEOUT = 60;       /* registration timeout */
+nb_syslog("starting %s", ME);
+lai = nb_config_get("sim.0.lai");
+if (lai != "") {
+    nb_syslog("unsetting lai '%s' of SIM1", lai);
+    nb_config_set("sim.0.lai=");
+    sleep(5);
+}
+wanlink = nb_config_get("wanlink.0.name");
+if (wanlink == "wwan0") {
+    mode = nb_config_get("wanlink.0.mode");
+    if (mode == "1") {
+        nb_syslog("disabling 1st wanlink");
+        nb_config_set("wanlink.0.mode=0");
+        sleep(5);
+    }
+}
+/* scan Mobile1 until we got networks */
+while (1) {
+    nb_syslog("scanning networks on Mobile1");
+    nets = nb_scan_networks("Mobile1");
+    nr_nets = struct_get(nets, "NETWORK_COUNT");
+    if (!is_void(nr_nets) && nr_nets > 0) {
+        nb_syslog("%d networks found", nr_nets);
+        break;
+    }
+    nb_syslog("no networks found, scanning again in %ds", SCAN_INTERVAL);
+    sleep(SCAN_INTERVAL);
+}
+networks = mkarray();
+netcount = 0;
+for (i = 1; i <= nr_nets; i++) {
+    net = trim(struct_get(nets, sprintf("NETWORK%d_NAME", i)));
+    lai = trim(struct_get(nets, sprintf("NETWORK%d_LAI", i)));
+    status = struct_get(nets, sprintf("NETWORK%d_STATUS", i));
+    if (is_void(net) || is_void(lai) || is_void(status)) continue;
+    if (trim(status) == "available" && net != "") {
+        nb_syslog("detected network '%s' (lai %s)", net, lai);
+        networks[netcount++] = mkstruct("network", net,
+                                        "lai", lai,
+                                        "signal", -999);
+    } else {
+        nb_syslog("skipping invalid network '%s' (%s)", net, status);
+    }
+}
+bestnet = "";
+bestlai = -1;
+bestsignal = -999;
+for (i = 0; i < netcount; i++) {
+    network = networks[i];
+    net = struct_get(network, "network");
+    lai = struct_get(network, "lai");
+    nb_syslog("setting network '%s' (lai %s) over Mobile1", net, lai);
+    nb_config_set(sprintf("sim.0.lai=%s", lai));
+    nb_syslog("waiting until we have registered to '%s'", net);
+    sleep(10);
+    signal = -999;
+    for (r = 0; r < REG_TIMEOUT; r += 10) {
+        status = nb_status("wwan");
+        regstate = struct_get(status, "MOBILE1_REGISTRATION_STATE");
+        nb_syslog("registration state of '%s' is '%s'", net, regstate);
+        if (regstate == "registeredInHomeNetwork" || regstate == "registeredRoaming") {
+            nb_syslog("waiting for signal strength of '%s' to settle down", net);
+            sleep(10);
+            status = nb_status("wwan");
+            s = (int) struct_get(status, "MOBILE1_SIGNAL");
+            if (s < -113) {
+                signal = s;
+                nb_syslog("%s at '%s' with %d dBm", regstate, net, signal);
+                break;
+            } else {
+                nb_syslog("saw invalid signal strength %d", s);
+            }
+        }
+        sleep(10);
+    }
+    if (bestnet == "" || bestlai == -1 || signal > bestsignal) {
+        bestnet = net;
+        bestsignal = signal;
+        bestlai = lai;
+    }
+}
+if (bestlai == -1) {
+    nb_syslog("no best operator found");
+} else {
+    nb_syslog("setting best operator '%s' (lai %s)", bestnet, bestlai);
+    nb_config_set(sprintf("sim.0.lai=%s", bestlai));
+    sleep(5);
+    nb_syslog("activating 1st wanlink");
+    nb_config_set("wanlink.0.mode=1");
+}
+nb_syslog("done");
+exit(0);
+</code>

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