# Script preparation

The script that requests update from the B3 SMS server and sends SMS can be downloaded from <https://icuscandinavia060.sharepoint.com/:u:/s/Technicalfile/EdQ6VQ3B_BNBh-sSq7GUWv0BP5XJCm1nwqNCFTt88ldhWA?e=tb4orB>

The default script is shown below. It must be modified before it is installed on the router.

{% code overflow="wrap" lineNumbers="true" %}

```sh
#!/bin/sh
APIUniqueID="Customer1b3"
#If you are using Telia SIM with ICU APN you must use IP adress - in other cases you need to use top domain.
API_URL="http://rqs.se/api/data/json.asp?id=$APIUniqueID"
#API_URL="http://10.50.33.14/api/data/json.asp?id=$APIUniqueID"
API_KEY="dZucDUygTFJvgCs7QRDx"
#SMS_GATEWAY="http://172.16.0.32/cgi-bin/sms_send"
SMS_GATEWAY="http://127.0.0.1/cgi-bin/sms_send"
USERNAME="smsuser"
PASSWORD="n2femPSx83PTVhkX"
INTERVAL=60

urlencode() {
  local s="$1"
  local out=""
  local i=1
  local c

  while [ $i -le ${#s} ]; do
    c=$(echo "$s" | cut -c $i)
    case "$c" in
      [a-zA-Z0-9.~_-]) out="$out$c" ;;
      *) out="$out$(printf '%%%02X' "'$c")" ;;
    esac
    i=$((i + 1))
  done

  echo "$out"
}

# Get SIM/modem status using gsmctl
OPERATOR=$(gsmctl --operator)
RSSI=$(gsmctl -q | grep -o '[0-9\-]*')
ICCID=$(gsmctl --iccid)
IMEI=$(gsmctl --imei)

# gsmctl may not provide RSRP/RSRQ; omit if unsupported
RSRP=""
RSRQ=""
SIM_STATE=""  # Not available in gsmctl
SIM_ACTIVE=""

POST_PAYLOAD=$(cat <<EOF
{
  "custId": "$APIUniqueID",
  "signal_rssi": "$RSSI",
  "operator": "$OPERATOR",
  "iccid": "$ICCID",
  "imei": "$IMEI"
}
EOF
)

while true; do

  RESPONSE=$(curl -s -H "x-api-key: $API_KEY" "$API_URL")

  CODE=$(echo "$RESPONSE" | awk -F'"code"[[:space:]]*:[[:space:]]*"' '{print $2}' | awk -F'"' '{print $1}')

  if [ "$CODE" = "99" ]; then
    logger -t poll_api "Received code 99 - no SMS to send"
    SMSNR=""
    TEXT=""
  else
    SMSNR=$(echo "$RESPONSE" | awk -F'"smsnr"[[:space:]]*:[[:space:]]*"' '{print $2}' | awk -F'"' '{print $1}')
    TEXT=$(echo "$RESPONSE" | awk -F'"text"[[:space:]]*:[[:space:]]*"' '{print $2}' | awk -F'"' '{print $1}')

    if [ -n "$SMSNR" ]; then
      ENCODED_TEXT=$(urlencode "$TEXT")
      FULL_URL="${SMS_GATEWAY}?username=${USERNAME}&password=${PASSWORD}&number=${SMSNR}&text=${ENCODED_TEXT}"

      logger -t poll_api "Sending SMS to $SMSNR: $TEXT"
      curl -s "$FULL_URL"
    else
      logger -t poll_api "No SMS number found in response"
    fi
  fi

  curl -s -X POST "$API_URL" -H "x-api-key: $API_KEY" -H "Content-Type: application/json" -d "$POST_PAYLOAD"

  sleep $INTERVAL
done
```

{% endcode %}

There are two places were the script shall be modified:

1. [APIUniqueID](/b3-sms-device-installation-manual/installation-procedures/router-setup/script-preparation/apiuniqueid.md).
2. [SMS server URL](/b3-sms-device-installation-manual/installation-procedures/router-setup/script-preparation/sms-server-url.md).


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