nRF9160-DK and lwm2m sample

Question

Hi, 
 I'm just getting started and tried to run the lwm2m_client sample from the v1.2.0 release of the nRF Connect SDK which I assume is the latest stable version? However lte_lc_init fails with error code -5 which can be traced to the zephyr message queue: 
 w_lte_lc_init() 
 at_cmd_write (nw_mode_preferred, NULL , 0 , NULL ) 
 at_write (cmd, state) 
 k_msgq_get (&return_code_msq, &ret, K_FOREVER);

which sets ret.code to -8 ( Exec format error ?) 
 
 It looks like a low level zephyr issue. Should I switch to another release? Thanks.

Louis · Accepted Answer

Upgraded the modem firmware and I now pass lte_lc_init: 
 #!/usr/bin/env python3
#
# Copyright (c) 2019 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic


from pynrfjprog import HighLevel
import wget
import sys

def bar_progress(current, total, width=80):
 progress_message = "Downloading: %d%% [%d / %d] bytes" % (current / total * 100, current, total)
 sys.stdout.write("" + progress_message)
 sys.stdout.flush()

LATEST_FIRMWARE = "mfwnrf9160120.zip"
wget.download("https://www.nordicsemi.com/-/media/Software-and-other-downloads/Dev-Kits/nRF9160-DK/nRF9160-modem-FW/" + LATEST_FIRMWARE, bar=bar_progress, out="/tmp/"+LATEST_FIRMWARE)

api = HighLevel.API()
api.open()
snr = api.get_connected_probes()
for s in snr:
 probe = HighLevel.IPCDFUProbe(api, s, HighLevel.CoProcessor.CP_MODEM)
 print("
Programming the new firmware...")
 probe.program("/tmp/"+LATEST_FIRMWARE)
 print("Verifying the new firmware...")
 probe.verify("/tmp/"+LATEST_FIRMWARE)
 print("Done")
 
api.close()

nRF9160-DK and lwm2m sample

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