nRF9160 SLEEP mode

[SSimon]

Dear Sirs,

after "few" hours of testing, I noticed that nRF9160-DK loaded with SLM v.1.6.1 is not working the same after awakened up from sleep (#SLEEP=1) or even from idle (#SLEEP=0) mode.

After awakening it up, I can not establish MQTT communication any more. The same is with HTTP.

I'm assuming that VM is not propriety writen or read out.

Or maybe, I should perform some actions before ( or after ) entering SLEEP mode?

Further more, I noticed that MODEM stays active after entering SLEEP mode. I also try the command  AT%XDATAPRFL and again, I did not noticed any difference in current consumption.

How I can influence on MODEM power consumption?

Best regards,

Simon.

[Albrecht Markus Schellenberger]

Hello Simon,

Or maybe, I should perform some actions before ( or after ) entering SLEEP mode?

as described in the documentation, both idle and sleep mode will terminate the SLM service which means that the active socket will be closed. Thus they have to be reopened when leaving power saving mode.

Further more, I noticed that MODEM stays active after entering SLEEP mode. I also try the command  AT%XDATAPRFL and again, I did not noticed any difference in current consumption.

This sounds a little bit strange to me, to be honest. The modem should enter sleep mode when #XSLEEP=1. After waking up the SLM, AT+CFUN? should give 0. What is the power consumption in both cases?

Regards,

Markus