Time from NTP server

RE: Time from NTP server

Håkon Alseth — Wed, 06 Oct 2021 08:30:42 GMT

Hi,

[quote user="Rajender"]

How can i know that?

I tried sending at%xtime=1, its just sending ok, nothing more than that, so how can i make sure that my SDR supports this?

[/quote]

In the top of the at command doc, it states how this information should be sent over:

https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/nw_service/xtime_set.html?cp=2_1_7_9_0

You could ask the vendor of your SDR software suite to hear if this feature is supported.

Kind regards,

Håkon

RE: Time from NTP server

Rajender — Tue, 05 Oct 2021 18:18:05 GMT

Hi,

[quote userid="2115" url="~/f/nordic-q-a/80189/time-from-ntp-server/332654#332654"]The network will provide the time using XTIME. Does your SDR support this?[/quote]

How can i know that?

I tried sending at%xtime=1, its just sending ok, nothing more than that, so how can i make sure that my SDR supports this?

Best Regards

Rajender

RE: Time from NTP server

Håkon Alseth — Tue, 05 Oct 2021 13:48:35 GMT

Hi,

[quote user="Rajender"]note: Iam not on actual catm1 network, i am connecting through SDR(simulation based n/w station).[/quote]

The network will provide the time using XTIME. Does your SDR support this?

Kind regards,

Håkon

RE: Time from NTP server

Rajender — Tue, 05 Oct 2021 12:14:45 GMT

Hi,

I was connecting the network through main only, and please take a look at my network connecting function.

 int nRF_Radio_configure(void) {
  int err = 0;
  int reqTAU, reqActiveTime;
  float NetWrkEdrx = 0.0, Pagingtw = 0.0, ReqEdrxVal = 0.0;

#if defined(CONFIG_BSD_LIBRARY)
  if (IS_ENABLED(CONFIG_LTE_AUTO_INIT_AND_CONNECT)) {
    /* Do nothing, modem is already turned on */
    /* and connected */
    goto connected;
  }

  LOG_INF("Connecting to LTE network.");
  LOG_INF("This may take several minutes.");

#if defined(CONFIG_LWM2M_CARRIER)
  /* Wait for the LWM2M carrier library to configure the */
  /* modem and set up the LTE connection. */
  k_sem_take(&lte_connected, K_FOREVER);
#else /* defined(CONFIG_LWM2M_CARRIER) */

  err = setSystemMode();
  if (err) {
    LOG_ERR("System mode set:%d \n", err);
    return err;
  }

  err = enablePsm(false);

  if (err) {
    LOG_ERR("PSM not enabled \n");
    return err;
  }

  err = eDRXsetting(false);

  if (err) {
    LOG_ERR("eDRX not enabled \n");
    return err;
  }

  err = lte_lc_init_and_connect();

  if (err) {
    LOG_ERR("LTE link could not be established.\n");
    return err;
  } else {

    u8_radio_lte_conn_flag = true;
    LOG_INF("Connected to LTE network.\n");
  }
#endif /* defined(CONFIG_LWM2M_CARRIER) */

connected:

  if (RADIO_PSM_MODE == u8_Psm_eDrx_Status_flag) {
    err = lte_lc_psm_get(&reqTAU, &reqActiveTime);
    if (err < 0) {
      LOG_INF("Error reading PSM parameter: %d Errno: %d\n", err, errno);
    }
  }

  if (RADIO_EDRX_MODE == u8_Psm_eDrx_Status_flag) {

    err = readEdrxParameter(&NetWrkEdrx, &Pagingtw, &ReqEdrxVal);
    if (err < 0) {
      LOG_INF("Error reading eDrx parameter: %d,Errno: %d\n", err, errno);
    }
  }

#endif /* defined(CONFIG_BSD_LIBRARY) */
  return 0;
}

this is my prj file, here i already done this, CONFIG_LTE_AUTO_INIT_AND_CONNECT=n.

CONFIG_GPIO=n
CONFIG_GPIO_NRFX=y
CONFIG_GPIO_NRF_P0=y
CONFIG_NRFX_GPIOTE=y

CONFIG_NRFX_RTC=y
CONFIG_NRFX_RTC0=y
CONFIG_NRFX_RTC1=y
CONFIG_NRFX_RTC2=y

CONFIG_UART_ASYNC_API=y

CONFIG_NEWLIB_LIBC=y
#######################################
# SNTP
CONFIG_SNTP=y

# enable to use thread names
CONFIG_THREAD_NAME=y

# Network
CONFIG_NETWORKING=y
CONFIG_NET_SOCKETS_OFFLOAD=y
CONFIG_NET_SOCKETS=y
CONFIG_NET_SOCKETS_POSIX_NAMES=y
CONFIG_NET_NATIVE=n

# LTE link control
CONFIG_LTE_LINK_CONTROL=y
CONFIG_LTE_AUTO_INIT_AND_CONNECT=n
CONFIG_LTE_PSM_REQ_RPTAU="00000011"
CONFIG_LTE_PSM_REQ_RAT="00100001"
CONFIG_LTE_PDP_CMD=y
CONFIG_LTE_LOCK_BANDS=n
CONFIG_LTE_LOCK_BAND_MASK="10000001000000001100"
CONFIG_LTE_PDP_CONTEXT="0,\"IP\",\"default\""

# BSD library
CONFIG_BSD_LIBRARY=y

# AT host library
CONFIG_AT_HOST_LIBRARY=y
#CONFIG_UART_INTERRUPT_DRIVEN=y

# Stacks and heaps
CONFIG_MAIN_STACK_SIZE=2048
CONFIG_HEAP_MEM_POOL_SIZE=1024

# Disable native network stack to save some memory
CONFIG_NET_IPV4=y
CONFIG_NET_IPV6=n
CONFIG_NET_UDP=y
CONFIG_NET_TCP=y

###gpio related###
#CONFIG_GPIO=y

###UART CONFIGURATION###
#Enables serial driver
#CONFIG_SERIAL=y

#Needed for enabling ISRs
#CONFIG_UART_INTERRUPT_DRIVEN=y

#UART RAM buffer allocation, see TXD.MAXCNT on nRF9160
CONFIG_UART_0_NRF_TX_BUFFER_SIZE=1024
CONFIG_UART_2_NRF_TX_BUFFER_SIZE=1024

###power management###
CONFIG_DEVICE_POWER_MANAGEMENT=y

###RTOS###
#enables polling
CONFIG_POLL=y

#PP---???
#CONFIG_DYNAMIC_OBJECTS=y

#enables ring buffer
CONFIG_RING_BUFFER=y

#this macro enabled for u8_t to work
CONFIG_DEPRECATED_ZEPHYR_INT_TYPES=y


#CONFIG_NRFX_UARTE=y
#CONFIG_NRFX_UARTE0=y
#CONFIG_NRFX_UARTE2=y


CONFIG_ADC=y
#CONFIG_ADC_0=y
#CONFIG_ADC_NRFX_SAADC=y

#SPI
CONFIG_SPI=y
CONFIG_SPI_3=y
CONFIG_SPI_NRFX=y
CONFIG_MAIN_STACK_SIZE=4096
CONFIG_SPI_NOR=y


#I2C
CONFIG_I2C=y
CONFIG_I2C_NRFX=y
CONFIG_I2C_1=y



#DebugLogs
CONFIG_BOOT_BANNER=n
###################################
CONFIG_TRUSTED_EXECUTION_NONSECURE=y

CONFIG_PRINTK=y
CONFIG_CONSOLE=y

CONFIG_LOG=y

CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_IMMEDIATE=y

CONFIG_SERIAL=y
CONFIG_STDOUT_CONSOLE=y

CONFIG_UART_CONSOLE=n
CONFIG_RTT_CONSOLE=y

note: Iam not on actual catm1 network, i am connecting through SDR(simulation based n/w station).

RE: Time from NTP server

Håkon Alseth — Tue, 05 Oct 2021 07:55:08 GMT

Hi,

[quote user="Rajender"]

Now i can get the time from ntp server (time1.google.com) using sntp, but i want to get the time from at%xtime=1 also,

I am sending this %xtime command after network connected and got ip address, but still im getting nothing but "OK" as a response, what would be the reason for this?

[/quote]

I'm glad to hear that you got ntp running.

The %XTIME enables a notification, so it is important that you enable this notification early in the process.

This can require that you enable the notification prior to connecting to the modem, ie. by setting CONFIG_LTE_AUTO_INIT_AND_CONNECT=n in your prj.conf and connecting to the network in main, something similar to this:

https://github.com/nrfconnect/sdk-nrf/blob/v1.7.0/samples/nrf9160/mqtt_simple/src/main.c#L506-L545

Kind regards,

Håkon

RE: Time from NTP server

Rajender — Tue, 05 Oct 2021 06:02:39 GMT

Hi,

Now i can get the time from ntp server (time1.google.com) using sntp, but i want to get the time from at%xtime=1 also,

I am sending this %xtime command after network connected and got ip address, but still im getting nothing but "OK" as a response, what would be the reason for this?

Best Regards

Rajender

RE: Time from NTP server

Håkon Alseth — Mon, 04 Oct 2021 11:36:46 GMT

Hi,

[quote user="Rajender"]

In this example i haven't seen any network connectivity code, so where i can find the same, and how i can check my IP address after network connection.

Now my Control not even entering into src/main file, may be its waiting for the Connectivity, so how can i check that?

[/quote]

When CONFIG_LTE_AUTO_INIT_AND_CONNECT=y is set, it will wait in the lte_lc driver on boot-up before main is entered. Once main is entered, the link shall be up and running.

[quote user="Rajender"]In this example i haven't seen any network connectivity code, so where i can find the same, and how i can check my IP address after network connection.[/quote]

You can use this library to obtain this information:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.7.0/nrf/libraries/modem/modem_info.html

but then I would also recommend that you look at date_time library as well, which I linked to in my former post.

Kind regards,

Håkon

RE: Time from NTP server

Rajender — Mon, 04 Oct 2021 07:29:37 GMT

Hi,

after adding "CONFIG_LTE_AUTO_INIT_AND_CONNECT=y" my prj.conf file looks like this.

# General config
CONFIG_NEWLIB_LIBC=y
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
CONFIG_NCS_SAMPLES_DEFAULTS=y
CONFIG_SERIAL=n

# Network
CONFIG_NETWORKING=y
CONFIG_NET_NATIVE=n
CONFIG_NET_SOCKETS=y
CONFIG_NET_SOCKETS_OFFLOAD=y

# LTE link control
CONFIG_LTE_LINK_CONTROL=y
CONFIG_LTE_AUTO_INIT_AND_CONNECT=n

# Modem library
CONFIG_NRF_MODEM_LIB=y

# Heap and stacks
CONFIG_HEAP_MEM_POOL_SIZE=1024
CONFIG_MAIN_STACK_SIZE=4096
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# SNTP
CONFIG_SNTP=y

CONFIG_LTE_AUTO_INIT_AND_CONNECT=y

In this example i haven't seen any network connectivity code, so where i can find the same, and how i can check my IP address after network connection.

Now my Control not even entering into src/main file, may be its waiting for the Connectivity, so how can i check that?

RE: Time from NTP server

Håkon Alseth — Mon, 04 Oct 2021 07:06:20 GMT

My apologies. I forgot to add:

CONFIG_LTE_AUTO_INIT_AND_CONNECT=y

Kind regards,

Håkon

RE: Time from NTP server

Rajender — Mon, 04 Oct 2021 06:59:37 GMT

Hi,

I have tried again, but now its getting error as "Failed to send over UDP socket -1"

RE: Time from NTP server

Håkon Alseth — Fri, 01 Oct 2021 12:33:13 GMT

Hi,

You have two options for fetching NTP:

* Use the DATE_TIME library: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.7.0/nrf/libraries/others/date_time.html?highlight=date_time

You can find a reference implementation in asset_tracker (look at "date_time" references): https://github.com/nrfconnect/sdk-nrf/blob/v1.5.1/applications/asset_tracker/src/main.c

* Use SNTP directly, by adjusting the configuration.

Replace the sntp_client/prj.conf with these lines:

https://github.com/nrfconnect/sdk-nrf/blob/v1.5.1/samples/nrf9160/udp/prj.conf#L7-L29

Then set the IP to the ntp server here:

https://github.com/nrfconnect/sdk-zephyr/blob/master/samples/net/sockets/sntp_client/src/config.h#L17-L19

example: ntp.uio.no resolves to ipv4 address "129.240.2.6"

[quote user=""]

i have tried sntp_client example (zephyr/samples/net/sockets/sntp_client) but when i run my code its directly going into fault_s.S after spm_jump() function.

[/quote]

This is due to the default configuration of the zephyr samples, where they assume native network. You have to adjust the configuration as mentioned above.

Kind regards,

Håkon