thingy 91

[Hkhan7861]

Good day 

I'm attempting to create an object type for my thingy91.  I've attempted to use the method described in this link to do so:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.6.1/nrf/include/net/lwm2m_client_utils.html#id4

However, I am not seeing any change server side.  Has the method changed? Are there limitations within Leshan demo server?

Attached is a snippet of my c

// DEFINING NEW OJECT TYPE
// ***********************
#define IPSO_DIGITAL_OUTPUT_ID        3201
#define OUTPUT_DIGITAL_STATE_ID        5550
#define RESOURCE_PATH LWM2M_PATH(IPSO_DIGITAL_OUTPUT_ID, 0, OUTPUT_DIGITAL_STATE_ID)

/* resource state */
struct output_data {
   bool state;
};
static struct output_data output_data[2];

#define N_RESOURCES        1
 static struct lwm2m_engine_obj_field fields[] = {
    OBJ_FIELD(OUTPUT_DIGITAL_STATE_ID, RW, BOOL),
};

static struct lwm2m_engine_obj output_obj;
static struct lwm2m_engine_obj_inst inst[2];
static struct lwm2m_engine_res res[2][N_RESOURCES];
static struct lwm2m_engine_res_inst res_inst[2][N_RESOURCES];

static struct lwm2m_engine_obj_inst *output_create(uint16_t id)
{

	LOG_ERR("create ouput init");
   /* Check that there is no other instance with this ID */
   /* It is assumed that the instance ID is same as the index in the array */
   if (inst[id].obj) {
      LOG_ERR("Cannot create instance - already existing: %u", id);
      return NULL;
   }

   if (id >= 2) {
      LOG_ERR("Cannot create instance - no more room: %u", id);
      return NULL;
   }

   /* Set default values */
   (void)memset(&output_data[id], 0, sizeof(output_data[id]));

   (void)memset(res[id], 0, sizeof(res[id][0]) * ARRAY_SIZE(res[id]));
   init_res_instance(res_inst[id], ARRAY_SIZE(res_inst[id]));

   /* initialize instance resource data */
   int i = 0, j = 0;
//    INIT_OBJ_RES(OUTPUT_DIGITAL_STATE_ID, res[id], i,
//          res_inst[id], j, 1, false, true,
//          &output_data[id].state,
//          sizeof(output_data[id].state),
//          NULL, NULL, NULL, NULL);
INIT_OBJ_RES(OUTPUT_DIGITAL_STATE_ID, res[id], i, res_inst[id], j, 1, false, true,&output_data[id].state,
		     sizeof(output_data[id].state), NULL, NULL, NULL, NULL, NULL);
   inst[id].resources = res[id];
   inst[id].resource_count = i;

   LOG_DBG("Created IPSO Output instance: %d", id);

   return &inst[id];
}

static void *on_off_cb(uint16_t obj_inst_id, uint16_t res_id, uint16_t res_inst_id, size_t *data_len)
 {
    // /* Only object instance 0 is currently used */
    // if (obj_inst_id != 0) {
    //    *data_len = 0;
    // return NULL;
    // }

    // /* Demo: change the sensor value */
    // ++sensor_value.val2;

    // /* Return sensor value for the LwM2M library */
    // lwm2m_engine_set_float32("3300/0/5700", &sensor_value);
    // *data_len = sizeof(sensor_value);
    // return &sensor_value;
 }

int ipso_output_init()
{
   output_obj.obj_id = IPSO_DIGITAL_OUTPUT_ID;
   output_obj.fields = fields;
   output_obj.field_count = ARRAY_SIZE(fields);
   output_obj.max_instance_count = ARRAY_SIZE(inst);
   output_obj.create_cb = output_create;
   lwm2m_register_obj(&output_obj);
   int err = lwm2m_engine_create_obj_inst(LWM2M_PATH(3201, 0));
   LOG_WRN("object inst created : %d", err);
   lwm2m_engine_register_post_write_callback(RESOURCE_PATH, on_off_cb);
   return 0;
}
// ***********************

ode. 

[Einarh]

Hello

I'm attempting to create an object type for my thingy91.

Can you specify what exactly you want to create?

Also, what NCS version are you using, and what are you running server side?

Best regards,

Einar

[Hkhan7861]

Good day

I want a to create a string object that I can use to observe values being sent from a device.  I am using the Leshan Demo Server and I am using the latest NCS versions

[Einarh]

Hkhan7861 said:

I am using the latest NCS versions

Then first of all I would recommend also using the latest documentation.

I assume you're defining a custom object as described here:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.6.1/nrf/include/net/lwm2m_client_utils.html#defining-custom-objects

Have you followed every step in this guide?

Have you made an attempt to debug where it goes wrong?

-Einar

[Hkhan7861]

Good day 

Yes , I have followed every step of this guide and attempted to debug.  The guide does not work as is and some changes had to be made.  The object shows up but any resource I make doesn't show up. 

[Einarh]

Ok, what changes did you have to make and what resources are you trying to add?

-Einar

[Hkhan7861]

The function INIT_OBJ_RES is missing an argument in this example and won;t work with later versions.

INIT_OBJ_RES(OUTPUT_DIGITAL_STATE_ID, res[id], i,
         res_inst[id], j, 1, false, true,
         &output_data[id].state,
         sizeof(output_data[id].state),
         NULL, NULL, NULL, NULL);
Like in said previously I want to an object whereby I can create a custom resource that i can label and store a string inside.  Would that be possible .