Setting EDRx

[nrfmh]

Hi,

I am trying to set EDRx en LOG_INF the result using following code:

static struct lte_lc_edrx_cfg drx_cfg;

//enable EDRx

LOG_INF("== Setting EDRx ==");

lte_lc_edrx_req (true);

lte_lc_edrx_param_set (LTE_LC_LTE_MODE_LTEM, NULL);

lte_lc_edrx_get (&drx_cfg);

LOG_INF("== drx_cfg.edrx (eDRX interval in seconds): %f",  drx_cfg.edrx);

LOG_INF(" == drx_cfg.ptw (Paging time window in seconds): %f",  drx_cfg.ptw);

Resulting in output:

[00:00:38.473,785] <inf> A:  == drx_cfg.edrx (eDRX interval in seconds): *float*

[00:00:38.473,815] <inf> A: == drx_cfg.ptw (Paging time window in seconds): *float*

So I get "*float*" and not the values. It seems the network also does not set edrx.

What am I doing wrong?

Best regards,

Mart

[Michal]

Hello Mart,

Are you able to check the eDRX status using AT commands by chance?

Best regards,

Michal

[nrfmh]

Hi Michal,

I did some research and found other posts regarding the same issue. eDRX was set correctly, the issue is printing the values using:

• LOG_INF
• printk

 It seems both cannot handle "%f" (float). See also posts like:

 nrf9160 samples cannot use sscanf or printk with float 

All given possible solutions to make LOG_INF and printk work with floats are not working - or I am missing some information - using the latest SDK.

A workaround using gcvt given in this forum also:

static char buf[10];
gcvt(drx_cfg.edrx, 6, buf);
LOG_INF(" == drx_cfg.edrx (eDRX interval in seconds): %s",  buf);

This is working although VisualCode gives an error regarding gcvt does not have any parameters. But is compiles, flashes and works without problems.

So there is something wrong printing floats using %f in my config.

Any ideas?

Best regards,

Mart

[Michal]

Hello Mart,

Ah, that makes sense. Have you tried using the solution with printf instead mentioned in that ticket?

Best regards,

Michal

[nrfmh]

Hi Michal,

Yes, but that does not print through the debug-terminal like printk and log_inf.

Any suggestions how to solve this? Are there working Kconfig settings for this board en recent SDK versions or do you have any suggestions?

Best regards and thanks,

Mart

[Michal]

By debug-terminal, do you mean RTT?

[nrfmh]

Correct

[Michal]

What if you set:

CONFIG_RTT_CONSOLE=y

CONFIG_UART_CONSOLE=n