DAL devices running firmware version 19.1 or higher can use any of the options for upgrading the Telit modem listed in the knowledgebase link below:

Upgrading Modem Firmware

If you elect to manually upgrade the Telit modem through the local web UI of the DAL device, the xx5 firmware file can be downloaded here:

Telit 20.00.xx5 Combined Firmware

Instructions on updating  your DAL device to firmware version 19.1.134.81 can be found below:

Updating Firmware

Minimum firmware: 18.8.14.124

Create a new custom script under System -> Scheduled tasks -> custom scripts, and enter in the following.   Adjust the Interval to the desired interval you would like this script to run.  The recommended minimal interval is 5-minutes.

#!/bin/sh

# upgrade AT&T and Verizon firmware images of the Telit
# LE910-NAv2 module to the xx5 firmware verison
# AT&T:  20.00.505
# Verizon:  20.00.005

# script only works on firmware version 18.8.14.124+
# set as a scheduled task to run once every 5 minutes


bugout() {
  accns_log w config "custom: $1"
  exit 1
}

success_end() {
  accns_log w config "custom: $1"
  exit
}

modem_index() {
  idx=$(modem idx)
  if ! [ "$idx" ]; then
    sleep 10
    idx=$(modem idx)
    [ "$idx" ] || bugout "modem not present"
  fi
  echo "$idx"
}

modem_must_be_present() {
  # wait up to one minute for the modem to initialize
  i=0
  ret=0
  modem_found=0
  while [ "$i" -lt 2 ]; do
    if [ "$(runt get mm.modem.$(modem_index).modem.model)" = 'LE910-NA V2' ]; then
      modem_found=1
      break
    elif [ "$(modem at '+cgmm')" = 'LE910-NA V2' ]; then
      modem_found=1
      break
    fi
    sleep 30
    i=$((i+1))
  done
  if [ "$modem_found" = 0 ]; then
    ret=1
  fi
  return $ret
}

opt_space_too_small() {
  opt_available_space="$(df -k /opt/ | tail -1 | awk '{print $4}')"
  [ "$opt_available_space" -ge "$file_space_needed" ] && return 1
  return
}

# we have limited space for local firmware images on the filesystem, so cleanup
# any old or un-needed firmware images to make room for the Telit combined image
cleanup_opt_directory() {
  rm -rf /opt/cutom/*
  opt_space_too_small && rm -rf /opt/sierra-wireless*
  opt_space_too_small && rm -rf /opt/*
}

get_telit_firmware_file() {
  [ -f "/opt/telit_custom/$firmware_file_name" ] && [ "$(md5sum /opt/telit_custom/$firmware_file_name | awk '{print $1}')" = "$firmware_file_md5sum" ] && return
  rm -rf "/opt/telit_custom/$firmware_file_name"  # remove potentially half-downloaded file
  opt_space_too_small && cleanup_opt_directory
  opt_space_too_small && return 1
  mkdir -p /opt/telit_custom/
  curl -kLm 300 -o "/opt/telit_custom/$firmware_file_name" "$firmware_image_url"
  [ -f "/opt/telit_custom/$firmware_file_name" ] && [ "$(md5sum /opt/telit_custom/$firmware_file_name | awk '{print $1}')" = "$firmware_file_md5sum" ] && return
  return 1
}

get_telit_fw_update_script() {
  [ -x "/opt/telit_custom/$fw_update_script_name" ] && return
  mkdir -p /opt/telit_custom/
  curl -kLm 300 -o "/opt/telit_custom/$fw_update_script_name" "$fw_update_script_url"
  [ -f "/opt/telit_custom/$fw_update_script_name" ] && chmod +x "/opt/telit_custom/$fw_update_script_name" && return
  return 1
}

base_url='https://downloads.accns.com/telit'
fw_update_script_name='update-telit-firmware_no_md5sum_check.sh'
firmware_file_name='stream_LE910_NA_V2_1G_SKU-20.00.505_LE910_SV_V2_1G_SKU-20.00.005.bin'
firmware_file_md5sum='38b4470f298a7a8ee1698fd21fb8c781'
fw_update_script_url="$base_url/$fw_update_script_name"
firmware_image_url="$base_url/$firmware_file_name"
file_space_needed='48000'

get_telit_fw_update_script || bugout "unable to download modded update-telit-firmware.sh script"
get_telit_firmware_file || bugout "unable to download combined firmware image for LE910-NAv2 module"
modem_must_be_present || bugout "no LE910-NAv2 modem detected"

current_revision="$(runt get mm.modem.$(modem_index).modem.revision)"
[ "$current_revision" ] || current_revision="$(modem at '+cgmr')"
device_path="$(mmcli -m $(modem_index) | grep "System.*device:" | grep -o "'.*'" | tr -d "'")"
imei="$(runt get mm.modem.$(modem_index).modem.imei)"
model="$(runt get mm.modem.$(modem_index).modem.model | sed -e 's/[ :-]/_/g' -e 's/[][]//g')"

if [ "$current_revision" = '20.00.505' ] || [ "$current_revision" = '20.00.005' ]; then
  success_end "LE910-NAv2 module $imei already updated and running firmware $current_revision"
else
  # let's do the update!
  # /opt/telit_custom/update-telit-firmware /sys/devices/platform/soc/soc:internal-regs/d0051000.usb/usb2/2-1 modem/module LE910_NA_V2 /opt/telit_custom/stream_LE910_NA_V2_1G_SKU-20.00.505_LE910_SV_V2_1G_SKU-20.00.005.bin
  if /opt/telit_custom/$fw_update_script_name "$device_path" 'modem/module' "$model" "/opt/telit_custom/$firmware_file_name"; then
    success_end "LE910-NAv2 module $imei successfully updated and to xx5 firmware"
  else
    bugout "firmware update failed for LE910-NAv2 IMEI $imei. Module may be bricked"
  fi
fi