sim iccid

[David]

Hello,

How can I read out the ICCID of the sim card?

I've tried to do it with AT%XICCID, getting error on this.

AT+CRSM=176,12258,0,0,10

+CRSM: 144,0,"98740006819041410210"

OK

the above works, but then the returned data is shifted, which makes it alittle complex to handle.

Any ideas?

Im using the at_client to test with,

NCS ver 1.4

- David

[anicare-tero]

What is the modem firmware version you are using? The AT%XICCID command is only supported by 1.1.3 and 1.2.x.

What is the error you are receiving from AT%XICCID ?

On devices with older modem firmware (like 1.1.1) I have flipped the ICCID string received from that CRSM command with this function: https://github.com/nrfconnect/sdk-nrf/blob/master/lib/modem_info/modem_info.c#L351-L363

[David]

Hello,

So I upgraded the modem firmware to 1.2.x, now Im able to use the command "AT%XICCID" and its response looks correct, but when I try to implement this in the AT_client example and print to console, the returned data is srumbled.

/*
 * Copyright (c) 2018 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic
 */

#include <zephyr.h>
#include <stdio.h>
#include <drivers/uart.h>
#include <string.h>

/**@brief Recoverable BSD library error. */
void bsd_recoverable_error_handler(uint32_t err)
{
	printk("bsdlib recoverable error: %u\n", err);
}

void main(void)
{
	printk("The AT host sample started\n");
        int buf1[100];
        char buf2[100];
        char buf3[100];

        at_cmd_write("AT%XICCID", //AT+CEREG?
                   buf1,
                   100,
                   NULL);
        k_sleep(K_MSEC(2000)); 
        printk("ANSWER %s\r\n", buf2);
        k_sleep(K_MSEC(100));
        at_cmd_write("AT%XICCID", //AT+CEREG?
                   buf1,
                   100,
                   NULL);
          
        printk("ANSWER %s\r\n", buf3);
        k_sleep(K_MSEC(2000)); 
        at_cmd_write("AT%XVBAT", //AT+CEREG?
                     buf1,
                     100,
                     NULL);
          
            printk("ANSWER %s\r\n", buf1);
}

Regards, David

[anicare-tero]

Hi,

I might found some mistakes in your code. With AT%XICCID command you are trying to get the response into buf1 and then print buf2 & buf3. Just make sure you are trying to print out the same buffer that you have used with a sent AT command.

[David]

Hey Ziirou,

Im not sure that is the issue, 

Maybe it has something to do with formatting the returned data correctly for print function?

David

[anicare-tero]

I modified your code a little and now it's working for me at least.

/*
 * Copyright (c) 2018 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic
 */

#include <zephyr.h>
#include <stdio.h>
#include <drivers/uart.h>
#include <string.h>

/**@brief Recoverable BSD library error. */
void bsd_recoverable_error_handler(uint32_t err)
{
	printk("bsdlib recoverable error: %u\n", err);
}

void main(void)
{
	printk("The AT host sample started\n");
	uint8_t buffer[100];

	at_cmd_write("AT%XICCID", //AT+CEREG?
			buffer,
			100,
			NULL);
	printk("ANSWER %s", buffer);

	at_cmd_write("AT%XVBAT", //AT+CEREG?
			buffer,
			100,
			NULL);
	printk("ANSWER %s", buffer);
}

[David]

Hi,

This is the response I get with your changes to the code,

David

[anicare-tero]

Are you receiving the ICCID by sending the AT command from the LTE Link Monitor? EDIT: Oh, it seems you already answered on this earlier.

It's strange that the code is working for me but not for you.

[David]

Hi again,

Yeah, it seems I need to activate with AT+CFUN=1, before asking for the ICCID

void main(void)
{

        //printk("ANSWER %s\r\n", buf2);
        //printk("ANSWER %s\r\n", buf3);

        printk("The AT host sample started\n");
	uint8_t buffer[100];
        char buffer1[100];
        
        k_sleep(K_MSEC(2000));
        at_cmd_write("AT+CFUN=1", //AT+CEREG?
			buffer,
			100,
			NULL);
	printk("ANSWER %s\r\n", buffer);

        k_sleep(K_MSEC(2000));
        at_cmd_write("AT+CFUN?", //AT+CEREG?
			buffer,
			100,
			NULL);
	printk("ANSWER %s\r\n", buffer);

	at_cmd_write("AT%XICCID", //AT+CEREG?
			buffer,
			100,
			NULL);
	printk("ANSWER %s\r\n", buffer);

	at_cmd_write("AT%XVBAT", //AT+CEREG?
			buffer,
			100,
			NULL);
	printk("ANSWER %s\r\n", buffer);

}

[anicare-tero]

Oh I didn't remember that but yes, that explains why it was working for me but not for you. I tested the code with a custom board and I had activated the modem from my board's code before the sample even started.

[David]

Hi,

Ok, well, thank you for taking your time to assist.

David