added periodic lwm2m registration

examples/javascript/lwm2m.c

@@ -208,7 +208,7 @@ void lwm2m_register(void)
     gcoap_req_init(&pdu, &buf[0], GCOAP_PDU_BUF_SIZE, 2, "/rd");
     gcoap_add_qstring(&pdu, "b", "U");
     gcoap_add_qstring(&pdu, "lwm2m", "1.0");
-    gcoap_add_qstring(&pdu, "lt", "7200");
+    gcoap_add_qstring(&pdu, "lt", "200");
     gcoap_add_qstring(&pdu, "ep", device_id);
     memcpy(pdu.payload, lwm2m_resources, strlen(lwm2m_resources));
     len = gcoap_finish(&pdu, strlen(lwm2m_resources), COAP_FORMAT_TEXT);

examples/javascript/main.c

@@ -27,6 +27,7 @@
 #include "xtimer.h"
 #include "lwm2m.h"
 #include "js.h"
+#include "thread.h"
 
 /* include headers generated from *.js */
 #include "lib.js.h"
@@ -35,6 +36,7 @@
 static event_queue_t event_queue;
 
 char script[2048];
+char lwm2mkeepalive[100];
 
 #define MAIN_QUEUE_SIZE (4)
 static msg_t _main_msg_queue[MAIN_QUEUE_SIZE];
@@ -72,6 +74,20 @@ void js_restart(void)
     js_shutdown(&js_start_event);
 }
 
+void *lwm2mkeepalive_handler(void *arg)
+{
+    /* remove warning unused parameter arg */
+    (void)arg;
+
+    lwm2m_init();
+
+    while(1) {
+        lwm2m_register();
+        xtimer_sleep(180);
+    }
+    return NULL;
+}
+
 int main(void)
 {
     msg_init_queue(_main_msg_queue, MAIN_QUEUE_SIZE);
@@ -87,8 +103,13 @@ int main(void)
 
     /* register to LWM2M server */
     puts("initializing coap, registering at lwm2m server");
-    lwm2m_init();
-    lwm2m_register();
+
+    /* launch lwm2m registration & keepalive thread */
+    thread_create(lwm2mkeepalive, sizeof(lwm2mkeepalive),
+                    THREAD_PRIORITY_MAIN - 1,
+                    THREAD_CREATE_STACKTEST,
+                    lwm2mkeepalive_handler,
+                    NULL, "lwm2m keepalive");
 
     puts("setting up event queue");
     event_queue_init(&event_queue);