nRF9160 AT+CFUN=0 draws excessive current

[Houwer de Geus]

Hi,

This is a situation after registration. See the following link for detailed information of the setup:

https://devzone.nordicsemi.com/f/nordic-q-a/45544/nrf9160-dk-psm-current-too-high-after-opening-and-closing-a-tcp-socket

I have registered the device for testing the PSM mode. After registration I wanted to shutdown the modem entirely by issuing the AT+CFUN=0 command.

I expected the current to drop to about 6uA or lower.

This did not happen. The current consumption after AT+CFUN=0 became about 9.33mA.

When using the AT command AT+CFUN=44, the current did get low as expected.

Anyway I assumed that AT+CFUN=0 would turn the modem off completely.

Is this correct?

Best regards,

Houwer de Geus

[Houwer de Geus]

Hi Martin,

The mfw_nrf9160_0.7.0-29.alpha version solves the problem. Thanks a lot!

I did try to get the v0.4.0 NCS release. I could perform all commands you mentioned, except for the last one. The west update could not be performed. I suppose I missed earlier steps to install this. Maybe you could point me in the right direction. Otherwise I will study the documentation myself.

Anyhow I thank you for the quick responses on this issue.

Best regards,

Houwer de Geus

[Martin Lesund]

Hi Houwer,

Great to hear that the new modem firmware fixed the issue.

You probably have not installed the "west" tool. (you can follow this guide or the following:)

For all the steps for installing the toolchain is listed in the updated "Getting Started Assistant" application in the nRF Connect for Desktop. 

Best Regards,

Martin L.

[Houwer de Geus]

Hi Martin,

Thanks for pointing me in the right direction. I will follow the instructions,

Best Regards,

Houwer de Geus