I am now using SDK1.3.0-rc1 with NRF9160. I use the serial_lte_modem project and using nrf52 to send at command for controlling nrf9160.
I can connect to the network, but I have a problem on using PSM.
I send the AT command to turn set the TAU period to be 1 minute and Active time to be 30 sec.
AT+CPSMS=1,,,"10100001","00001111"
After it connect to the network, I got the following CEREG response.
+CEREG: 1,"C3B5","0186E6CA",9,,,"00001111","11100000"
I have checked that once it goes into low power , it never wake up again.
I see that the TAU timer in the response is invalid and I also try longer time for 1 hour , 2 hour or more but the results always show invalid timer.
so I ask the service provider and they told me that it should be correct and tell me asking for module provider.
The commands that I used is simply as follow: (nbiot with legacy pco)
AT+CPSMS=1,,,"10100001","00001111"
AT%XSYSTEMMODE=0,1,0,0
AT%XEPCO=0
AT+CFUN=1
Does that mean I should add a timer to trigger the nrf9160 for turning on after some times?
Or do you have any suggestion?
Are there any more setting that I need to operate in PSM? Thank you
