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  • Case ID: 288174
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Nrf9160 not setting requested active time

user115072

Good day I am wondering if you can help me.

For background information.

Network - NB-iot

Firmware -  1.3.1

Software - Serial LTE Modem

Hardware - nrf9160dk

I am trying to set the requested active time down so that when I go into idle to save power and keep my IP connection that the modem doesn't stay active for 60 seconds there after.

The device is going into low power mode but only after 60 seconds. 

I will attach a screen shot of the AT-commands that I take to get to the point where I'd like to go into low power but the Requested Active Time does not change.

I came across this following link while attempting to get my power consumption down.

(+) turn off active time and go directly to power save mode - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com)

I tried the command AT+CPSMS=1,"","","10101010","00000000" to set the periodic TAU to 10 minutes and the requested active time to 0 and to 2 (00000001) seconds.

But they had no influence on the 60 seconds of high power consumption after issuing the AT#XSLEEP=2 to put the system into idle.

If anyone has any input as to where I am going wrong I will greatly appreciate it.

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  • 0

    Hello Pieter,

    PieterK said:

    What is the major differences between the AT-client and the SLM?

    Does the AT client also do power management on its own? 

    The AT Client is a simple program which can be used to send AT commands via UART from an external source to the modem.

    The Serial LTE modem application basically provides the same functionality as the AT Client and can additionally be used as a stand-alone LTE modem on the nRF9160. Hence, the application itself supports a lot more features, like Power saving or other SLM-specific AT commands to enable certain functionality.

    So you can perform the same steps below with the Serial LTE modem as well.

    Regards,

    Markus

Reply
  • 0

    Hello Pieter,

    PieterK said:

    What is the major differences between the AT-client and the SLM?

    Does the AT client also do power management on its own? 

    The AT Client is a simple program which can be used to send AT commands via UART from an external source to the modem.

    The Serial LTE modem application basically provides the same functionality as the AT Client and can additionally be used as a stand-alone LTE modem on the nRF9160. Hence, the application itself supports a lot more features, like Power saving or other SLM-specific AT commands to enable certain functionality.

    So you can perform the same steps below with the Serial LTE modem as well.

    Regards,

    Markus

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