Get stats from Nighthawk M2 router

nighthawk.sh

modelJson=''
get_value() {
  val=$(echo $modelJson | grep "$1" | awk -F: ' { print $2 }' | sed 's/[,]//' | sed -e 's/^[[:space:]]//')
  echo "${val//[^a-zA-Z0-9_ ]/}"
}

nighthawk() {
  modelJson=$(curl -sL http://192.168.1.1/api/model.json)
  rssi=$(get_value rssi)
  battChargeLevel=$(get_value battChargeLevel)
  charging=$(get_value charging)
  deviceTempCritical=$(get_value deviceTempCritical)
  devTemperature=$(get_value devTemperature)
  # vodafone NZ
  registerNetworkDisplay=$(get_value registerNetworkDisplay)
  # 1800
  chanId=$(get_value chanId\")
  # LTE B3
  curBand=$(get_value curBand)
  # 1050389
  cellId=$(get_value cellId)

  saying="Connected to ${registerNetworkDisplay}." \
  saying="${saying} Battery ${battChargeLevel} percent." \
  saying="${saying} RSSI ${rssi} on ${curBand}."
  echo $saying
  echo "chanId: ${chanId}"
  echo "cellId: ${cellId}"
}