What should be MAGPIO command sequence for connecting to NBIOT network ?

[Jagir008]

In my application i need to use NBIOT network & GNSS.

For that i found that i need to configure AT%XSYSTEMMODE=0,1,1,2.

But i am not clear on what should be configuration for AT%XMAGPIO command ?

  

[Martin Lesund]

Hi Jagir008,

Yes, that would be the correct use of the XSYSTEMMODE AT-Command.

However, you can achieve the same functionality if you use the LTE Link Control driver and enable the config:

CONFIG_LTE_NETWORK_MODE_NBIOT_GPS in prj.conf.

It's quite easy the process of connecting to a network when you enable the LTE Link Control driver (instead of manually adding the AT commands yourself)

---

You should not need to change anything with the XMAGPIO command. 

You would usually use it when e.g. to control an external antenna tuner, or any other GPIO-controlled device, whose state depends on modem's RF frequency.

In that case, I would recommend this White paper: nRF9160 Antenna and RF Interface Guidelines

Best regards,

Martin L.

[Jagir008]

Hi Martin,

What should be initialization steps for using LTE Link control Driver.

Currently i have used "lte_lc_init_and_connect()"  & added configuration in pr.cfg file.

As per my understanding i need to include kConfig file for LTE link control & Call this function for initialization.

Please let me know required steps for it.  

[Martin Lesund]

Hi Jagir,

To use the LTE Link Control Driver in your application you just have to enable the driver.

You can do this by manually adding these lines in prj.conf:

# LTE link control
CONFIG_LTE_LINK_CONTROL=y
CONFIG_LTE_AUTO_INIT_AND_CONNECT=n

and in your main.c you add:

#include <lte_lc.h>

And I would recommend copying the "modem_configure()" function which is used in most of our samples to enable the modem.

/**@brief Configures modem to provide LTE link. Blocks until link is
 * successfully established.
 */
static void modem_configure(void)
{
#if defined(CONFIG_LTE_LINK_CONTROL)
	if (IS_ENABLED(CONFIG_LTE_AUTO_INIT_AND_CONNECT)) {
		/* Do nothing, modem is already turned on
		 * and connected.
		 */
	} else {
		int err;

		printk("LTE Link Connecting ...\n");
		err = lte_lc_init_and_connect();
		__ASSERT(err == 0, "LTE link could not be established.");
		printk("LTE Link Connected!\n");
	}
#endif
}

---

The Kconfig for the LTE Link Control driver is automatically available when you enable the LTE Link Control driver:

CONFIG_LTE_LINK_CONTROL=y

Best regards,

Martin L.