Assign both CoAP client and server roles to a node in nRF_Connect_SDK

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Sigurd Hellesvik — Fri, 14 Jan 2022 09:50:29 GMT

From the function I see, theerror OT_ERROR_INVALID_STATE comes from the function "otCoapSendRequest". Could you right-click this and "Go to definition"?

Find where the error comes from, and if the "otCoapSendRequest" returns OT_ERROR_INVALID_STATE anywhere.

Regards,
Sigurd Hellesvik

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Thu, 13 Jan 2022 18:43:41 GMT

I am currently using segger for development.

And I need help in understanding why my CoAP packet is not reaching my CoAP server which is present on Border Router.

How to resolve this "OT_ERROR_INVALID_STATE"?

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Sigurd Hellesvik — Thu, 13 Jan 2022 14:31:05 GMT

Which function definition?

Which IDE are you using for developement?

Regards,
Sigurd Hellesvik

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Thu, 13 Jan 2022 13:18:39 GMT

I have seen function definition in "modules//lib/openthread/src/core/api/coap_api.cpp". But its generic return messages doesn't contain this return message.

can you help in debugging?

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Sigurd Hellesvik — Thu, 13 Jan 2022 13:00:54 GMT

[quote user="bhumika"]Do I need to initialize something which is being missed?[/quote]

Yes, this is likely.

To figure out exactly what is missing, find where the error is set in the CoAP library.

Regards,
Sigurd Hellesvik

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Thu, 13 Jan 2022 05:01:04 GMT

Hi,

It was my bad, ipaddr is available.

I am using below code to send CoAP message to my CoAP server:


#define BORDER_ROUTER_IP  "2001:db8:1:ffff::a00:1" 
#define BOOTSTRAP_MESSAGE_FORMAT "o=2&i=1&t=1&2=10"
#define COMMON_RESOURCE "proxy/zenedge"
#define EUID "u=64088dce2d8f7568"
#define PACKET_VERSION "pv=1"
#define BOOTSTRAP_RESOURCE "pt=b"

/**
 * @brief Bootstrap callback
 * @param aContext Not used
 * @param aMessage coap message
 * @param aMessageInfo Not used
 * @param aError  Error happened during receiving of coap message
 */
void bootStrapCallBack(
    void *aContext,
    otMessage *aMessage,
    const otMessageInfo *aMessageInfo,
    otError aError) {
  uint32_t length = otMessageGetLength(aMessage) - otMessageGetOffset(aMessage);
  uint8_t buff_callback[256];

  if (aError != OT_ERROR_NONE) {
    LOG_INF("(bootstrap call_back) Error receiving coap response message: Error %d: %s\r\n", aError,
        otThreadErrorToString(aError));
  } else {
    if (otCoapMessageGetCode(aMessage) == OT_COAP_CODE_CONTENT) {

      LOG_INF("(bootstrap call_back) Response received successfully\n\r");
      if (length < 256) {
        otMessageRead(aMessage, otMessageGetOffset(aMessage), buff_callback, length);
        LOG_INF("%s\n\r", buff_callback);
      } else {
        LOG_INF("Response length too lengthy\n");
      }
    } else {
      LOG_INF("Response code is %d,  %s\r\n", otCoapMessageGetCode(aMessage),
          otThreadErrorToString(otCoapMessageGetCode(aMessage)));
    }
  }
  OT_UNUSED_VARIABLE(aContext);
  OT_UNUSED_VARIABLE(aMessageInfo);
}


/**
 * @param openthread instance
 * @action print address of device
 */
static void addresses_print(otInstance *aInstance) {
  LOG_INF("Print IPv6 address of node");
  const otNetifAddress *unicastAddrs = otIp6GetUnicastAddresses(aInstance);
  for (const otNetifAddress *addr = unicastAddrs; addr; addr = addr->mNext) {
    char string[OT_IP6_ADDRESS_STRING_SIZE];
    const otIp6Address add6 = addr->mAddress;
    otIp6AddressToString(&add6, string, sizeof(add6));
    LOG_INF("addr: %s", log_strdup(string));
  }
}


/**
 * @brief send coap packet for bootstraping
 */
void coap_send_bootstrap_message() {
  struct openthread_context *context = openthread_get_default_context();
  char buff[30];
  char *bootstrap_message_payload = NULL;
  sprintf(buff, BOOTSTRAP_MESSAGE_FORMAT);
  bootstrap_message_payload = (char *)malloc(30);
  strcpy(bootstrap_message_payload, buff);
  otMessageInfo message_info;
  otMessage *p_message;
  otError error = OT_ERROR_NONE;
  do {
    p_message = otCoapNewMessage(openthread_get_default_instance(), NULL);
    otCoapMessageInit(p_message, OT_COAP_TYPE_CONFIRMABLE, COAP_METHOD_POST);
    otCoapMessageGenerateToken(p_message, 2);
    otCoapMessageAppendUriPathOptions(p_message, COMMON_RESOURCE);
    otCoapMessageAppendUriQueryOption(p_message, EUID);
    otCoapMessageAppendUriQueryOption(p_message, PACKET_VERSION);
    otCoapMessageAppendUriQueryOption(p_message, BOOTSTRAP_RESOURCE);
    otCoapMessageSetPayloadMarker(p_message);
    if (p_message == NULL) {
      LOG_INF("Failed to allocate config message for CoAP Request\r\n");
      break;
    }
    error = otMessageAppend(p_message, bootstrap_message_payload, strlen(bootstrap_message_payload));
    if (error != OT_ERROR_NONE) {
      break;
    }
    memset(&message_info, 0, sizeof(message_info));
    message_info.mPeerPort = COAP_PORT;
    otIp6AddressFromString(BORDER_ROUTER_IP, &message_info.mPeerAddr);

    LOG_INF("Send Bootstarp message");
    error = otCoapSendRequest(context->instance, p_message, &message_info, bootStrapCallBack, NULL);
    
  } while (false);
  LOG_INF("*********Print node address********* ");
  addresses_print(context->instance);

  if (error != OT_ERROR_NONE && p_message != NULL) {
    LOG_INF("Failed to send config CoAP Request: %d\r\n", error);
    otMessageFree(p_message);
  } else {
    LOG_INF("Packet sent successfully");
  }
  free(bootstrap_message_payload);
}

Bur while sending the coap message I am receiving the following error.

[00:09:12.965,362] <inf> coap_client_utils: Send Bootstarp message
[00:09:12.965,454] <inf> coap_client_utils: *********Print node address*********
[00:09:12.965,454] <inf> coap_client_utils: Print IPv6 address of node
[00:09:12.965,637] <inf> coap_client_utils: addr: feef:ee:0:0:267
[00:09:12.965,820] <inf> coap_client_utils: addr: fdf2:8f4:1bb2:b
[00:09:12.966,033] <inf> coap_client_utils: addr: fdf2:8f4:1bb2:b
[00:09:12.966,217] <inf> coap_client_utils: addr: fe80:0:0:0:f6ce
[00:09:12.966,217] <inf> coap_client_utils: Failed to send config CoAP Request: 13

This Error code:'13' pertains to "OT_ERROR_INVALID_STATE" . In what condition do we get this response?

Do I need to initialize something which is being missed?

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Sigurd Hellesvik — Wed, 12 Jan 2022 14:10:26 GMT

Just to double check that you print all the available addresses:
Could you use the serial interface and do the command:

ot ipaddr

Does this return the same addresses as when you log?

Regards,
Sigurd Hellesvik

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Wed, 12 Jan 2022 07:23:03 GMT

In Old SDK (nrf_SDK_for_Thread_and_Zigbee_4.1.0), which is working with Border router here are the address:

<info> app: feef:ee:0:0:3b06:a24d:2625:50e7

<info> app: fdf2:8f4:1bb2:b82a:0:ff:fe00:1c0d

<info> app: fdf2:8f4:1bb2:b82a:800c:e83b:2bf4:518a

<info> app: fe80:0:0:0:7b9f:ccb1:dca1:e627

In nRF_Connect_SDK(v1.8.0), following address are formed:

[00:00:00.785,766] <inf> coap_client_utils: addr: fdf2:8f4:1bb2:b
[00:00:00.785,949] <inf> coap_client_utils: addr: fdf2:8f4:1bb2:b
[00:00:00.786,132] <inf> coap_client_utils: addr: fe80:0:0:0:f6ce

And following addresses are formed on my border router which hosts the CoAP Server:

 inet6 feef:ee::be40:d9ae:ce19:5dbc  prefixlen 64  scopeid 0x40<site>
        inet6 fe80::d4c8:801f:ac75:6cb5  prefixlen 64  scopeid 0x20<link>
        inet6 fdf2:8f4:1bb2:b82a:94a5:bb8d:4716:6657  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::1ac8:b1c:d7f9:a06c  prefixlen 64  scopeid 0x20<link>

So my understanding is that in my nRF_Connect_SDK based node, fix mesh prefix-based address is not formed, i.e. address with prefix: "feef:ee"

Can you tell me how to form this address?

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Sigurd Hellesvik — Tue, 11 Jan 2022 14:54:26 GMT

You need to add strdup to the logging. See Logging v1

LOG_INF("addr: %s\n", log_strdup(string));

Regards,
Sigurd Hellesvik

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Mon, 10 Jan 2022 09:25:36 GMT

hi,

I have tried again and reviewed my code.

I couldn't find any error with any interrupt.

Code crashed only while calling addresses_print function.

The attached code for the address print function is as follow:

/**
 * @param openthread instance
 * @action print address of device
 */
static void addresses_print(otInstance *aInstance) {
  LOG_INF("Print IPv6 address of node");
  const otNetifAddress *unicastAddrs = otIp6GetUnicastAddresses(openthread_get_default_instance());
  LOG_INF("Assigned 1");

  for (const otNetifAddress *addr = unicastAddrs; addr; addr = addr->mNext) {
    LOG_INF("***Inside Loop 1.1***");
    char string[OT_IP6_ADDRESS_STRING_SIZE];
    const otIp6Address add6 = addr->mAddress;
    LOG_INF("***Inside Loop 1.2***");
   // otIp6AddressToString(&add6, string, sizeof(add6));
    LOG_INF("addr: %s\n", string);
  }
}

Kindly look into it and help me in finding the cause of this crash.

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Sigurd Hellesvik — Fri, 07 Jan 2022 07:27:45 GMT

Your error message says:

[00:00:00.378,051] <err> os: Fault during interrupt handling
[00:00:00.378,082] <err> os: Current thread: 0x200015b8 (logging)

The fault happens in your logging, and seems to be connected to interrupts.
I advise that you investigate these in your program to try to find the issue.

Regards,
Sigurd Hellesvik

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Fri, 07 Jan 2022 05:14:19 GMT

can you suggest what is wrong with this implementation, why my code is crashing?

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Thu, 06 Jan 2022 10:58:31 GMT

I have modified my code as per the snippet provided by you.

Now my code looks like below mentioned...

/**
 * @param openthread instance
 * @action print address of device
 */
static void addresses_print(otInstance *aInstance) {
  LOG_INF("Print IPv^ address of node");
  const otNetifAddress *unicastAddrs = otIp6GetUnicastAddresses(openthread_get_default_instance());

  for (const otNetifAddress *addr = unicastAddrs; addr; addr = addr->mNext) {
    char string[OT_IP6_ADDRESS_STRING_SIZE];
    const otIp6Address add6 = addr->mAddress;
    otIp6AddressToString(&add6, string, sizeof(add6));
    LOG_INF("addr: %s\n", string);
  }
}
int i = 0;

static void on_thread_state_changed(uint32_t flags, void *context) {
  LOG_INF("***In on_thread_state_changed ");

  struct openthread_context *ot_context = context;

  if (flags & OT_CHANGED_THREAD_ROLE) {
    switch (otThreadGetDeviceRole(ot_context->instance)) {
    case OT_DEVICE_ROLE_CHILD:
    case OT_DEVICE_ROLE_ROUTER:
    case OT_DEVICE_ROLE_LEADER:
      if (i == 0) {
        i = 1;
        otThreadSetEnabled(ot_context->instance, false);
        otLinkSetExtendedAddress(ot_context->instance, &EUI64);
        otThreadSetEnabled(ot_context->instance, true);
      }
      LOG_INF("*****Node Role :  ");
      k_work_submit(&on_connect_work);
      LOG_INF("*********Print node address********* ");
      addresses_print(ot_context->instance);
      is_connected = true;
      dk_set_led_on(LIGHT_LED2);
      dk_set_led_off(LIGHT_LED3);
      break;

    case OT_DEVICE_ROLE_DISABLED:
    case OT_DEVICE_ROLE_DETACHED:
    default:
      LOG_INF("****Default Role :  ");
      k_work_submit(&on_disconnect_work);
      is_connected = false;
      dk_set_led_on(LIGHT_LED3);
      dk_set_led_off(LIGHT_LED2);
      break;
    }
  }
}

Still, I get the same error. Still, my code crashes.

I am not getting any IP address for nRF_Connect_Devices. Attached error log below...

[00:00:00.002,716] <inf> ieee802154_nrf5: nRF5 802154 radio initialized
[00:00:00.106,079] <inf> fs_nvs: 8 Sectors of 4096 bytes
[00:00:00.106,079] <inf> fs_nvs: alloc wra: 0, d58
[00:00:00.106,079] <inf> fs_nvs: data wra: 0, 4c4
[00:00:00.118,011] <inf> net_l2_openthread: State changed! Flags: 0x101fc300 current role: 0
[00:00:00.118,408] <inf> net_l2_openthread: OpenThread version: OPENTHREAD/69eb7030c-dirty; Zephyr; Jan  6 2022 11:43:49
[00:00:00.121,246] <inf> net_l2_openthread: OpenThread already commissioned.
[00:00:00.121,276] <inf> net_l2_openthread: Network name: fb9d04b4bc8d7a24
[00:00:00.188,018] <inf> net_l2_openthread: State changed! Flags: 0x0100103d current role: 1
[00:00:00.194,091] <inf> coap_client: Start CoAP-client sample
[00:00:00.194,580] <dbg> coap_utils.coap_init: CoAP socket receive thread started
[00:00:00.194,610] <inf> net_l2_openthread: OpenThread version: OPENTHREAD/69eb7030c-dirty; Zephyr; Jan  6 2022 11:43:49
[00:00:00.197,143] <inf> net_l2_openthread: OpenThread already commissioned.
[00:00:00.197,174] <inf> net_l2_openthread: Network name: fb9d04b4bc8d7a24
[00:00:00.198,516] <inf> net_l2_openthread: State changed! Flags: 0x00000010 current role: 1
[00:00:00.198,516] <inf> coap_client_utils: ***In on_thread_state_changed
[00:00:00.198,974] <inf> coap_client_utils: MAC Address of the Device: f4 ce 36 64 8 8d
[00:00:00.198,974] <inf> coap_client_utils:  ce 2d
[00:00:00.282,470] <inf> net_l2_openthread: State changed! Flags: 0x00001084 current role: 2
[00:00:00.283,050] <inf> coap_client_utils: ***In on_thread_state_changed
[00:00:00.290,802] <inf> coap_client_utils: *****Node Role :
[00:00:00.290,832] <inf> coap_client_utils: *********Print node address*********
[00:00:00.290,832] <inf> coap_client_utils: Print IPv^ address of node
[00:00:00.304,443] <err> os: s[ 4]:  0x00000000  s[ 5]:  0x00000000  s[ 6]:  0x00000000  s[ 7]:  0x00000000
--- 7 messages dropped ---
[00:00:00.304,443] <err> os: s[ 8]:  0x00000000  s[ 9]:  0x00000000  s[10]:  0x00000000  s[11]:  0x00000000
[00:00:00.304,473] <err> os: s[12]:  0x00000000  s[13]:  0x00000000  s[14]:  0x00000000  s[15]:  0x00000000
[00:00:00.304,473] <err> os: fpscr:  0x4c42e4d5
[00:00:00.304,504] <err> os: Faulting instruction address (r15/pc): 0x000554dc
[00:00:00.304,504] <err> os: >>> ZEPHYR FATAL ERROR 4: Kernel panic on CPU 0
[00:00:00.304,504] <err> os: Current thread: 0x200015b8 (logging)
[00:00:00.377,838] <err> os: ***** HARD FAULT *****
[00:00:00.377,868] <err> os:   Fault escalation (see below)
[00:00:00.377,868] <err> os: ARCH_EXCEPT with reason 4

[00:00:00.377,868] <err> os: r0/a1:  0x00000004  r1/a2:  0x000000d1  r2/a3:  0x00000001
[00:00:00.377,899] <err> os: r3/a4:  0x000138d5 r12/ip:  0x00000000 r14/lr:  0x00007b05
[00:00:00.377,899] <err> os:  xpsr:  0x4100000b
[00:00:00.377,899] <err> os: s[ 0]:  0x00000000  s[ 1]:  0x00000000  s[ 2]:  0x00000000  s[ 3]:  0x00000000
[00:00:00.377,929] <err> os: s[ 4]:  0x00000000  s[ 5]:  0x00000000  s[ 6]:  0x00000000  s[ 7]:  0x00000000
[00:00:00.377,960] <err> os: s[ 8]:  0x00000000  s[ 9]:  0x00000000  s[10]:  0x00000000  s[11]:  0x00000000
[00:00:00.377,990] <err> os: s[12]:  0x00000000  s[13]:  0x00000000  s[14]:  0x00000000  s[15]:  0x00000000
[00:00:00.377,990] <err> os: fpscr:  0x00000010
[00:00:00.378,021] <err> os: Faulting instruction address (r15/pc): 0x000554dc
[00:00:00.378,051] <err> os: >>> ZEPHYR FATAL ERROR 4: Kernel panic on CPU 0
[00:00:00.378,051] <err> os: Fault during interrupt handling

[00:00:00.378,082] <err> os: Current thread: 0x200015b8 (logging)
[00:00:01.267,242] <err> fatal_error: Resetting system

Below is the IP address available on the nRF_SDK thread devices...

<info> app: fdf3:cf88:3e4e:ad4d:e732:8425:d033:b6e2

<info> app: fdfe:ee41:832:1c64:0:ff:fe00:7c0a

<info> app: fdfe:ee41:832:1c64:37d8:db5e:5adb:a088

<info> app: fe80:0:0:0:7b9f:ccb1:dca1:e627

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Sigurd Hellesvik — Thu, 06 Jan 2022 10:33:32 GMT

My guess is that something is off with your print function.
OpenThread in Zephyr has a function to convert Ip6 addresses to strings, so it seems to work when I usethat instead:

    const otNetifAddress *unicastAddrs = otIp6GetUnicastAddresses(openthread_get_default_instance());    
    
    for (const otNetifAddress *addr = unicastAddrs; addr; addr = addr->mNext)    
    {    
        char string[OT_IP6_ADDRESS_STRING_SIZE];    
        const otIp6Address  add6 = addr->mAddress;    
        otIp6AddressToString(&add6, string, sizeof(add6));    
        printk("addr: %s\n",string);    
    }    
//void otIp6AddressToString(const otIp6Address *aAddress, char *aBuffer, uint16_t aSize)

Can you compare available IP addressed on the nRF Connect SDK thread devices and nRF5 SDK thread devices?

Regards,
Sigurd Hellesvik

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Thu, 06 Jan 2022 09:32:08 GMT

Hi Sigurd,

I am trying to print the address of my CoAP_Clien node, but I am facing a crash...

Below is the code snippet:

static void address_print(const otIp6Address *addr) {
  char ipstr[40];
  snprintf(ipstr, sizeof(ipstr), "%x:%x:%x:%x:%x:%x:%x:%x",
      ((uint8_t *)(addr->mFields.m16 + 0)),
      ((uint8_t *)(addr->mFields.m16 + 1)),
      ((uint8_t *)(addr->mFields.m16 + 2)),
      ((uint8_t *)(addr->mFields.m16 + 3)),
      ((uint8_t *)(addr->mFields.m16 + 4)),
      ((uint8_t *)(addr->mFields.m16 + 5)),
      ((uint8_t *)(addr->mFields.m16 + 6)),
      ((uint8_t *)(addr->mFields.m16 + 7)));
  LOG_INF("%s\r\n", (uint32_t)ipstr);
}

/**
 * @param openthread instance
 * @action print address of device
 */
static void addresses_print(otInstance *aInstance) {
  LOG_INF("Inside address print");
  int a = 0;
  for (const otNetifAddress *addr = otIp6GetUnicastAddresses(aInstance); addr; addr = addr->mNext) {
    LOG_INF("Inside for address print: %d", a);
    a++;
    address_print(&addr->mAddress);
  }
}

static void on_thread_state_changed(uint32_t flags, void *context) {
  LOG_INF("***In on_thread_state_changed ");

  struct openthread_context *ot_context = context;
  if (i == 0) {
    i = 1;
    otThreadSetEnabled(ot_context->instance, false);
    otLinkSetExtendedAddress(ot_context->instance, &EUI64);
    otThreadSetEnabled(ot_context->instance, true);
  }

  if (flags & OT_CHANGED_THREAD_ROLE) {
    switch (otThreadGetDeviceRole(ot_context->instance)) {
    case OT_DEVICE_ROLE_CHILD:
    case OT_DEVICE_ROLE_ROUTER:
    case OT_DEVICE_ROLE_LEADER:
      LOG_INF("*****Node Role :  ");
      k_work_submit(&on_connect_work);
      LOG_INF("*********Print node address********* ");
      addresses_print(ot_context->instance);
      is_connected = true;
      dk_set_led_on(LIGHT_LED2);
      dk_set_led_off(LIGHT_LED3);
      break;

    case OT_DEVICE_ROLE_DISABLED:
    case OT_DEVICE_ROLE_DETACHED:
    default:
      LOG_INF("****Default Role :  ");
      k_work_submit(&on_disconnect_work);
      is_connected = false;
      dk_set_led_on(LIGHT_LED3);
      dk_set_led_off(LIGHT_LED2);
      break;
    }
  }
}

Each Time code crashes when it goes inside the "addresses_print" function.

Below is the crash report:

[00:00:00.002,685] <inf> ieee802154_nrf5: nRF5 802154 radio initialized
[00:00:00.106,048] <inf> fs_nvs: 8 Sectors of 4096 bytes
[00:00:00.106,048] <inf> fs_nvs: alloc wra: 5, d98
[00:00:00.106,048] <inf> fs_nvs: data wra: 5, 428
[00:00:00.216,613] <inf> net_l2_openthread: State changed! Flags: 0x101fc300 current role: 0
[00:00:00.217,010] <inf> net_l2_openthread: OpenThread version: OPENTHREAD/69eb7030c-dirty; Zephyr; Jan  6 2022 11:43:49
[00:00:00.245,117] <inf> net_l2_openthread: OpenThread already commissioned.
[00:00:00.245,117] <inf> net_l2_openthread: Network name: fb9d04b4bc8d7a24
[00:00:00.363,403] <inf> net_l2_openthread: State changed! Flags: 0x0100103d current role: 1
[00:00:00.369,384] <inf> coap_client: Start CoAP-client sample
[00:00:00.369,903] <dbg> coap_utils.coap_init: CoAP socket receive thread started
[00:00:00.369,934] <inf> net_l2_openthread: OpenThread version: OPENTHREAD/69eb7030c-dirty; Zephyr; Jan  6 2022 11:43:49
[00:00:00.398,071] <inf> net_l2_openthread: OpenThread already commissioned.
[00:00:00.398,101] <inf> net_l2_openthread: Network name: fb9d04b4bc8d7a24
[00:00:00.399,261] <inf> net_l2_openthread: State changed! Flags: 0x00000010 current role: 1
[00:00:00.399,261] <inf> coap_client_utils: ***In on_thread_state_changed
[00:00:00.506,805] <inf> net_l2_openthread: State changed! Flags: 0x1000307f current role: 1
[00:00:00.507,110] <inf> coap_client_utils: ***In on_thread_state_changed
[00:00:00.507,141] <inf> coap_client_utils: ****Default Role :
[00:00:00.508,758] <inf> coap_client_utils: MAC Address of the Device: f4 ce 36 64 8 8d
[00:00:00.508,789] <inf> coap_client_utils:  ce 2d
[00:00:00.547,393] <inf> net_l2_openthread: State changed! Flags: 0x00003004 current role: 1
[00:00:00.547,607] <inf> coap_client_utils: ***In on_thread_state_changed
[00:00:00.547,607] <inf> coap_client_utils: ****Default Role :
[00:00:03.004,425] <inf> net_l2_openthread: State changed! Flags: 0x200012a4 current role: 2
[00:00:03.004,821] <inf> coap_client_utils: ***In on_thread_state_changed
[00:00:03.004,852] <inf> coap_client_utils: *****Node Role :
[00:00:03.004,852] <inf> coap_client_utils: *********Print node address*********
[00:00:03.004,852] <inf> coap_client_utils: Inside address print
[00:00:03.004,882] <inf> coap_client_utils: Inside for address print: 0
[00:00:03.005,004] <inf> coap_client_utils: Inside for address print: 1
[00:00:03.014,312] <err> os: s[ 4]:  0x00000000  s[ 5]:  0x00000000  s[ 6]:  0x00000000  s[ 7]:  0x00000000
--- 10 messages dropped ---
[00:00:03.014,343] <err> os: s[ 8]:  0x00000000  s[ 9]:  0x00000000  s[10]:  0x00000000  s[11]:  0x00000000
[00:00:03.014,343] <err> os: s[12]:  0x00000000  s[13]:  0x00000000  s[14]:  0x00000000  s[15]:  0x00000000
[00:00:03.014,343] <err> os: fpscr:  0x4c0244d5
[00:00:03.014,343] <err> os: Faulting instruction address (r15/pc): 0x00055518
[00:00:03.014,373] <err> os: >>> ZEPHYR FATAL ERROR 4: Kernel panic on CPU 0
[00:00:03.014,373] <err> os: Current thread: 0x200015b8 (logging)
[00:00:03.108,428] <err> os: ***** HARD FAULT *****
[00:00:03.108,428] <err> os:   Fault escalation (see below)
[00:00:03.108,428] <err> os: ARCH_EXCEPT with reason 4

[00:00:03.108,459] <err> os: r0/a1:  0x00000004  r1/a2:  0x000000d1  r2/a3:  0x00000001
[00:00:03.108,459] <err> os: r3/a4:  0x00013911 r12/ip:  0x00000000 r14/lr:  0x00007b41
[00:00:03.108,459] <err> os:  xpsr:  0x4100000b
[00:00:03.108,459] <err> os: s[ 0]:  0x00000000  s[ 1]:  0x00000000  s[ 2]:  0x00000000  s[ 3]:  0x00000000
[00:00:03.108,489] <err> os: s[ 4]:  0x00000000  s[ 5]:  0x00000000  s[ 6]:  0x00000000  s[ 7]:  0x00000000
[00:00:03.108,520] <err> os: s[ 8]:  0x00000000  s[ 9]:  0x00000000  s[10]:  0x00000000  s[11]:  0x00000000
[00:00:03.108,551] <err> os: s[12]:  0x00000000  s[13]:  0x00000000  s[14]:  0x00000000  s[15]:  0x00000000
[00:00:03.108,581] <err> os: fpscr:  0x00000011
[00:00:03.108,581] <err> os: Faulting instruction address (r15/pc): 0x00055518
[00:00:03.108,612] <err> os: >>> ZEPHYR FATAL ERROR 4: Kernel panic on CPU 0
[00:00:03.108,642] <err> os: Fault during interrupt handling

[00:00:03.108,673] <err> os: Current thread: 0x200015b8 (logging)
[00:00:03.997,863] <err> fatal_error: Resetting system
[00:00:00.002,685] <inf> ieee802154_nrf5: nRF5 802154 radio initialized

Can you tell me what's wrong with my address_print function?

Again this function works perfectly in nRF_SDK_for_Thread_and_Zigbee but crashes in nRF_Connect_SDK.

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Thu, 06 Jan 2022 08:59:12 GMT

Yes, your understanding is correct, simple_coap_client example from nRF% SDK can communicate with my CoAP Server when I commission it on my thread network, while the CoAP_Client sample from nRF_Connect-SDK cannot communicate with my CoAP server when I commission it on my thread network.

Also, the above crash disappeared after changing the stack size.

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Sigurd Hellesvik — Thu, 06 Jan 2022 08:21:14 GMT

Thestack overflow of the workqueue is likely because you put too many things on the workqueue stack.
This can be fixed by increasing the workqueue stack:

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096

Let me know if the second crash still persist after this.

You say

[quote user="bhumika"]No, I am not able to send packets to my server even on the CoAP client alone.[/quote]

and

[quote user="bhumika"]My other nodes which are based on nRF_SDK_For_Threda_and_Zigbee, also use the same address and nodes are able to send messages to my CoAP server via border router.[/quote]

Just to clarify, is my following understanding correct?
The coap_client sample from nRF Connect SDK can not communicate with your CoAP server?
The simple_coap_client example from nRF5 SDK can communicate with your CoAP server?

Regards,
Sigurd Hellesvik

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Wed, 05 Jan 2022 14:30:58 GMT

Can You also tell me the cause of error messages? These errors are causing crashes in my code and system reboots. These errors appear when I try to send any CoAP messages on the thread network.

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Wed, 05 Jan 2022 14:29:13 GMT

Yes I am using IP "2001:db8:1:ffff::a00:1" for your CoAP server.

My other nodes which are based on nRF_SDK_For_Threda_and_Zigbee, also use the same address and nodes are able to send messages to my CoAP server via border router.

I am facing this issue in this case only.

Also, can you explain the 2 crashes I have mentioned?

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Sigurd Hellesvik — Wed, 05 Jan 2022 14:09:41 GMT

It looks like you are using the IP "2001:db8:1:ffff::a00:1" for your CoAP server?

This will be the public IP of the Border Router (BR), which will face the internet, and your Thread devices will not be able to find it.

If you do "ip a" (on the Raspberry Pi) you will get a list of the other IP addresses of the BR.
If you find the address here which face the Thread network, try to use that instead.
Likely it will be one of the ones you listed:

> ipaddr
fdfe:ee41:832:1c64:0:ff:fe00:fc11
fdfe:ee41:832:1c64:0:ff:fe00:fc10
fdfe:ee41:832:1c64:0:ff:fe00:fc38
fdf3:cf88:3e4e:ad4d:70e1:dc2a:eb65:e787
fdfe:ee41:832:1c64:0:ff:fe00:7c00
fdfe:ee41:832:1c64:2104:5e7:bb29:898a
fe80:0:0:0:b458:3788:3659:13e2
Done

Regards,
Sigurd Hellesvik

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Wed, 05 Jan 2022 14:04:20 GMT

No, I don't need to connect to the internet for reaching my CoAP server. It is on my border router which is part of my thread network.

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Sigurd Hellesvik — Wed, 05 Jan 2022 13:53:58 GMT

I do not know what cause the error messages now. But let us have a look at the internet connection first:

The response from the pings:

1 packets transmitted, 0 packets received. Packet loss = 100.0%.

This means that all packets are lost.
The address you try to ping is an IPv4 address for Google through a IPv6 "bridge".
Since all packets were lost, this could indicate that you do not have any internet connectivity.

This will be a problem if the server you intend to communicate with devices outside your thread network.
Do you need to connect to the internet with your thread devices? (For example to reach an external coap server)
If you do, we will need to fix the border router.

Regards,
Sigurd Hellesvik

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Wed, 05 Jan 2022 12:52:36 GMT

Also, now I am receiving the following error in my logs...

Please explain the meaning of the following two crashes in the code:

[00:00:11.100,555] <inf> coap_client_utils: Send bootstrap message
[00:00:11.100,799] <err> os: ***** BUS FAULT *****
[00:00:11.100,799] <err> os:   Precise data bus error
[00:00:11.100,799] <err> os:   BFAR Address: 0x786f7270
[00:00:11.100,830] <err> os: r0/a1:  0x786f7270  r1/a2:  0x2000dde9  r2/a3:  0x786f7270
[00:00:11.100,830] <err> os: r3/a4:  0x786f7270 r12/ip:  0x000000e6 r14/lr:  0x00016259
[00:00:11.100,830] <err> os:  xpsr:  0x21000000
[00:00:11.100,830] <err> os: s[ 0]:  0x00000000  s[ 1]:  0x00000000  s[ 2]:  0x00000000  s[ 3]:  0x00000000
[00:00:11.100,860] <err> os: s[ 4]:  0x00000000  s[ 5]:  0x00000000  s[ 6]:  0x00000000  s[ 7]:  0xffffffff
[00:00:11.100,891] <err> os: s[ 8]:  0x00000000  s[ 9]:  0x00000000  s[10]:  0x00000000  s[11]:  0x00000000
[00:00:11.100,891] <err> os: s[12]:  0x00000000  s[13]:  0x00000000  s[14]:  0x00000000  s[15]:  0x00000000
[00:00:11.100,891] <err> os: fpscr:  0x20016e80
[00:00:11.100,921] <err> os: Faulting instruction address (r15/pc): 0x00004142
[00:00:11.100,921] <err> os: >>> ZEPHYR FATAL ERROR 0: CPU exception on CPU 0
[00:00:11.100,921] <err> os: Current thread: 0x20002280 (sysworkq)
[00:00:11.716,156] <err> fatal_error: Resetting system

[00:00:21.605,407] <inf> coap_client_utils: role :
[00:01:48.871,276] <inf> coap_client_utils: Send multicast mesh 'light' request
[00:01:48.871,795] <err> os: ***** MPU FAULT *****
[00:01:48.871,795] <err> os:   Stacking error (context area might be not valid)
[00:01:48.871,826] <err> os: r0/a1:  0x2000d144  r1/a2:  0x00000000  r2/a3:  0x00000008
[00:01:48.871,826] <err> os: r3/a4:  0x0001db71 r12/ip:  0x0000cd7c r14/lr:  0x61000000
[00:01:48.871,826] <err> os:  xpsr:  0x00000000
[00:01:48.871,856] <err> os: s[ 0]:  0x00000000  s[ 1]:  0x00000000  s[ 2]:  0x00000000  s[ 3]:  0x00000000
[00:01:48.871,856] <err> os: s[ 4]:  0x00000000  s[ 5]:  0xffffffff  s[ 6]:  0x00000000  s[ 7]:  0x00000000
[00:01:48.871,856] <err> os: s[ 8]:  0x00000000  s[ 9]:  0x00000000  s[10]:  0x00000000  s[11]:  0x00000000
[00:01:48.871,887] <err> os: s[12]:  0x00000000  s[13]:  0x00000000  s[14]:  0x00000000  s[15]:  0x00000000
[00:01:48.871,917] <err> os: fpscr:  0x2000d144
[00:01:48.871,917] <err> os: Faulting instruction address (r15/pc): 0x00000001
[00:01:48.871,917] <err> os: >>> ZEPHYR FATAL ERROR 2: Stack overflow on CPU 0
[00:01:48.871,948] <err> os: Current thread: 0x20002280 (sysworkq)
[00:01:49.436,157] <err> fatal_error: Resetting system

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Bhumika — Wed, 05 Jan 2022 12:27:14 GMT

My Coap Client is working fine as other nodes are able to send packets to it.

I don't understand your second point. This is the output of second point:

> >
> ipaddr
fdfe:ee41:832:1c64:0:ff:fe00:fc11
fdfe:ee41:832:1c64:0:ff:fe00:fc10
fdfe:ee41:832:1c64:0:ff:fe00:fc38
fdf3:cf88:3e4e:ad4d:70e1:dc2a:eb65:e787
fdfe:ee41:832:1c64:0:ff:fe00:7c00
fdfe:ee41:832:1c64:2104:5e7:bb29:898a
fe80:0:0:0:b458:3788:3659:13e2
Done
>
> ping 64:ff9b::0808:0808

1 packets transmitted, 0 packets received. Packet loss = 100.0%.
Done
> ping 64:ff9b::0808:0808

1 packets transmitted, 0 packets received. Packet loss = 100.0%.
Done
>

RE: Assign both CoAP client and server roles to a node in nRF_Connect_SDK

Sigurd Hellesvik — Wed, 05 Jan 2022 12:15:37 GMT

Then there are be multiple possible issues.
Let us try to debug these two first:

Something could be wrong with the server. Try to use another CoAP client to send a message to your server. For example https://coap.me/.
Maybe the Border Router does not connect the OpenThread network to the internet. Use the client in one of your OpenThread samples to do the following commands:
```
ot ipaddr
ot ping 64:ff9b::0808:0808
```

Regards,
Sigurd Hellesvik