I am using nRF9160 DK(PCA10090 0.9.0 2019.19) with Indian carrier LTE-M SIM and carried below steps to establish LTE-M communication with nRF Cloud:
1. Upgraded to latest firmware (nrf9160dk_fw_2020-04-29_bc7ade8b.zip) using Programmer
Application firmware : nrf9160dk_asset_tracker_ltem_2020-04-29_bc7ade8b.hex
Modem firmware : mfwnrf9160120.zip
2. Generated certificates at nRF Cloud and updated to nRF9160 DK. ( ensured proper IMEI and HWID are supplied while generating certificates)
LED 3 keep on blinking and rebooting after displaying below messages in Link monitor terminal.
tried few times as well.
Appreciate any pointers on how to trouble shoot this issue.
+CEREG: 2,"FFFE","FFFFFFFF",7,0,0,"11100000","11100000"
[00:01:07.385,040]
[0m<dbg> lte_lc.parse_nw_reg_status: Network registration status: 2
[0m
[00:10:00.412,139]
[0m<inf> lte_lc: Network connection attempt timed out
[0m
+CEREG: 0,"FFFE","FFFFFFFF",7,0,0,"11100000","11100000"
[00:10:00.434,600]
[0m<dbg> lte_lc.parse_nw_reg_status: Network registration status: 0
[0m
[00:10:00.442,901]
[0m<inf> lte_lc: Using fallback network mode
[0m
[00:10:00.449,035]
[0m<dbg> lte_lc.w_lte_lc_connect: Network mode: AT%XSYSTEMMODE=0,1,1,0
[0m
+CEREG: 2,"0094","00017718",9,0,0,"11100000","11100000"
[00:12:01.164,062]
[0m<dbg> lte_lc.parse_nw_reg_status: Network registration status: 2
[0m
+CEREG: 2,"0094","00017718",9,0,11,"11100000","11100000"
[00:12:01.607,116]
[0m<dbg> lte_lc.parse_nw_reg_status: Network registration status: 2
[0m
+CEREG: 4,"0094","00017718",9,0,11,"11100000","11100000"
[00:12:01.946,228]
[0m<dbg> lte_lc.parse_nw_reg_status: Network registration status: 4
[0m
+CEREG: 2,"FFFE","FFFFFFFF",9,0,11,"11100000","11100000"
[00:14:06.065,155]
[0m<dbg> lte_lc.parse_nw_reg_status: Network registration status: 2
[0m
[00:20:00.495,086]
[0m<inf> lte_lc: Network connection attempt timed out
[0m
[00:20:00.502,044]
[1;31m<err> asset_tracker: LTE link could not be established.
[0m
*** Booting Zephyr OS build v2.1.99-ncs1-1145-g13dc96f83bab ***
[00:00:00.006,805]
[0m<inf> mcuboot: Starting bootloader
[0m
[00:00:00.015,228]
[0m<inf> mcuboot: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
[0m
[00:00:00.028,594]
[0m<inf> mcuboot: Boot source: none
[0m
[00:00:00.035,827]
[0m<inf> mcuboot: Swap type: none
[0m
[00:00:00.440,887]
[0m<inf> mcuboot: Bootloader chainload address offset: 0x10000
[0m
[00:00:00.448,608]
[0m<inf> mcuboot: Jumping to the first image slot
[0m
*** Booting Zephyr OS build v2.1.99-ncs1-1145-g13dc96f83bab ***
Flash regions