How to use socket?

RE: How to use socket?

Martin Lesund — Thu, 02 Jul 2020 10:38:33 GMT

Good to hear that you could use nrf_socket to receive SMS.

To use the SMS library ("A library for managing SMS subscriptions") you would need to add the configuration, in prj.conf:

CONFIG_SMS=y

and

#include <modem/sms.h>

in your main file.

Unfortunately, we do not have a sample that uses this library.

RE: How to use socket?

Yusuke — Sat, 27 Jun 2020 06:19:20 GMT

OK. I cloud receive SMS using nrf_socket. Instead, sms.c doesn't work. I may use it in a wrong way. I hope sample program will be provided.

RE: How to use socket?

Yusuke — Fri, 26 Jun 2020 06:11:54 GMT

I read the link, but the code doesn't work. Instead this works out

int fd = nrf_socket(NRF_AF_LTE, NRF_SOCK_DGRAM, NRF_PROTO_AT);

On the other hand, this doesn't work. confusing. I referred to at_cmd.c

int fd = socket(AF_LTE, SOCK_DGRAM, NPROTO_AT);

RE: How to use socket?

Yusuke — Fri, 26 Jun 2020 01:04:42 GMT

in sms.h

/**
 * @brief Register a new listener.
 *
 * A listener is identified by a unique handle value. This handle should be used
 * to unregister the listener. A listener can be registered multiple times with
 * the same or a different context.
 *
 * @param listener Callback function. Cannot be null.
 * @param context User context. Can be null if not used.
 *
 * @retval -EINVAL Invalid parameter.
 * @retval -ENOMEM No memory to register new observers.
 * @return Handle identifying the listener,
 *         or a negative value if an error occurred.
 */
int sms_register_listener(sms_callback_t listener, void *context);

*The handle should be used to unregister the listener

=> what does this mean?

I would like to keep registering SMS notification. In this case, do you have to unregister it every time the handler is called?

RE: How to use socket?

Yusuke — Fri, 26 Jun 2020 00:48:38 GMT

I read the link but it doesn't explain how to use sms.h library.

RE: How to use socket?

Yusuke — Thu, 25 Jun 2020 12:33:02 GMT

in v1.2.0, I could receive SMS.

I'll check the link later

RE: How to use socket?

Martin Lesund — Thu, 25 Jun 2020 12:26:16 GMT

Hi Yusuke,
Please start out just by running AT Client sample and verify that you actually can send SMS with AT commands and that you have a SIM card that supports this.

You can see an example in this thread on how to do it:
https://devzone.nordicsemi.com/f/nordic-q-a/41755/sending-sms-using-at_client-example/164297#164297

RE: How to use socket?

Yusuke — Tue, 23 Jun 2020 09:31:45 GMT

Can't receive SMS by this program. Any tip?

<prj.conf>

#
# Copyright (c) 2019 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic
#
# General config
CONFIG_ASSERT=y

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

# SMS
CONFIG_SMS=y

# LTE link control
CONFIG_LTE_LINK_CONTROL=y
CONFIG_LTE_LOCK_BANDS=y
CONFIG_LTE_LOCK_BAND_MASK="10000000"
CONFIG_LTE_NETWORK_MODE_LTE_M=y
CONFIG_LTE_AUTO_INIT_AND_CONNECT=n

# BSD library
CONFIG_BSD_LIBRARY=y

# AT host library
CONFIG_AT_HOST_LIBRARY=n
CONFIG_UART_INTERRUPT_DRIVEN=y

# Stacks and heaps
CONFIG_MAIN_STACK_SIZE=3072
CONFIG_HEAP_MEM_POOL_SIZE=16384

# SEGGER RTT for Dev
CONFIG_PRINTK=y
CONFIG_CONSOLE=y
CONFIG_STDOUT_CONSOLE=y
CONFIG_UART_CONSOLE=n
CONFIG_RTT_CONSOLE=y
CONFIG_USE_SEGGER_RTT=y

<main.c>

#include <zephyr.h>
#include <stdio.h>
#include <modem/sms.h>
#include <modem/lte_lc.h>

void sms_handler(struct sms_data *const data, void *context)
{
    printk("here\n");
}

void main(){
    int ret;
    
	/* Configure LTE-M */
    printk("LTE Link Connecting ...\n");
    ret = lte_lc_init_and_connect();
    printk("LTE Link Connected!\n");
	if (ret) {
		printk("Error: modem_configure\n");
		return;
	}

	/* SMS socket set up */
	if (sms_init() != 0) {
        printk("ERROR: sms_init\n");
		return;
	}

    /* Set up listener */
	if (sms_register_listener(sms_handler, NULL) != 0) {
        printk("ERROR: sms_register_listener\n");
		return;
	}

    printk("SMS waiting...");
    
    while(1){}
}

RE: How to use socket?

Yusuke — Tue, 23 Jun 2020 08:57:35 GMT

Do you know any sample program using sms.c?

I really don't know what arguments should be included in sms listener...

RE: How to use socket?

Yusuke — Tue, 23 Jun 2020 08:47:16 GMT

Thank you for your reply! I read this document

What is User context in sms_register_listener arguments?

RE: How to use socket?

Martin Lesund — Tue, 23 Jun 2020 08:33:13 GMT

Hi Yusuke,

In NCS v1.3.0 we actually have an "SMS subscriber" library which you could use to accomplish this.
if you instead want to use regular AT commands, you make sockets the following way.