nrf9160 NBIOT network latching time

[Bhavya]

Hello I am using ncs version 1.5.0 .We are using nrf9160 dk version 0.15.0 & 1.0.0 for our development.Whereas we observed some issues like the network latching time is getting differed from board to board.NRFDK9160 0.15.0 is taking latching time less than a minute where as 1.0.0 is taking more than 2 minutes.Can you please explain us the reason behind this?

Thanks in Advance.

[Didrik Rokhaug]

Hi,

There are no hardware differences between those two versions that would explain the difference in performance you are seeing.

My guess is that the 0.15.0 DK has stored your local network parameters, while the 1.0.0 DK has to do a "fresh" search every time. Similar to hot and cold starts with GPS.

The modem will store the current network parameters to flash when you send AT+CFUN=0. So try to connect the 1.0.0 DK to the network, then disconnect with AT+CFUN=0.

That should speed up future attaches to that network.

Best regards,

Didrik