====== Frequently Asked Questions ======

===== How can I obtain the EUI from the serial number of my station? =====

  * Wirnet iBTS :        7276FF002E<last 6 characters of the CPU serial number>
  * Wirnet Station :     7276FF000<last 7 characters of the station barcode>  
  * Wirnet iFemtoCell :  7276FF00<last 8 characters of the CPU board serial number>  

For the iFemtoCell, you can retrieve the CPU serial number with the following command:
<code bash>
root@klk-wifc-01AAFF:~ # grep serial_number /tmp/sys_startup_status.json 
        "serial_number": "0x4501aaff", 
</code>
In this example, the EUI is ''7276FF004501AAFF''.

Note you can obtain directly the EUI from the /tmp/board_info.json file:
<code>
root@klk-wiis-040166:~ # cat /tmp/board_info.json | grep -i eui
        "EUI64": "7076FF0054040166", 
root@klk-wiis-040166:~ # 
</code>


===== What is the maximum number of gateways we can define? =====
  * We can limit the number of gateways, the number of endpoints and number of users linked to a customer via the administration menu (only accessible for users that have SuperAdmin privileges)

===== What is the maximum number of gateways we can define in the CSV file? =====
  * There is no limit

===== When we define a CSV, is it a "add" or a "replacement"? =====
  * Add

===== What happens when a mote is already defined in the system and when we try to add it again through the CSV file? =====
  * An exception is raised and the process stops

===== What happens when the file embodies a syntax error? =====
  * An exception is raised and the process stops when the error is encountered. All lines located before this point are taken into account by the system

===== When a mote is removed, is data related to this end-device is also removed? =====
  * Yes

===== When a gateway is removed, is data related to all end-devices that are connected to are also removed? =====
  * No

===== I have got a frame counter error (FCnt error). What can I do to cancel this status ? =====
   * In the LNS / endpoint menu, click on your endpoint and then click to the cross at the right side of the text "FRAME COUNTER DOWN"
   * select F5 for page refresh several times
=> Status "Uplink ok" appears and uplink message queue is updated with new messages in "Rx messages" tab

===== What is the VPN subnet address? =====
When connected to the Wanesy Management Center VPN, the IP address assigned to the gateway is in the ''10.8.0.0/16'' subnet.

The gateway LAN subnet should not overlap with this subnet.

===== My external application does not receive any data from WMC =====
WMC does not follow http redirected URLs. You have to input the real URL.

To check whether your URL is redirected or not: ''curl -I https://url-example.com/''

Here is an example of what happens when URL is redirected:

<code>
HTTP/1.1 301 Moved Permanently
Server: nginx/1.12.2
Date: Wed, 25 Apr 2018 12:56:10 GMT
Content-Type: text/html; charset=iso-8859-1
Connection: keep-alive
Location: http://redirected.url/
Strict-Transport-Security: max-age=31536000
Content-Security-Policy: default-src https: redirected.url 'unsafe-inline' 'unsafe-eval'
x-frame-options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
Referrer-Policy: strict-origin-when-cross-origin
</code>

===== How to put AES keys on WMC ? =====
AES keys, coded on 32 bits, permit to decode timestamps sent by the stations and used for geolocation.

Requirements:

  * Station declared
  * AES keys known

Once connected on WMC:

  - Select menu page LNS > Stations
  - Filter the station (thanks to its EUI for example)
  - Access to the station details by clicking on its EUI in the list of stations \\ {{:wiki:step1-2-3.jpg?800|}}
  - Click on "Add" button. \\ {{:wiki:step4.jpg?800|}}
  - The below window opens:
    * Complete RFCH which corresponds to the slot number of the radio modem. Usually RFCH=1. If there are several radio modems: RFCH=2, RFCH=3, RFCH=4...  
    * Put the AES key
    * Choose its end date of validity \\ {{ :wiki:step5.jpg?400 |}} \\ After AES key declaration, it is possible to check on device RX messages that fine timestamps are well generated:
  - Select menu LNS > Endpoints
  - Choose the cluster
  - Access to endpoint details by clicking on its Dev EUI \\ {{:wiki:steps6-7-8.jpg?1000|}}
  - Select menu "Rx Messages" and verify that there are fine timestamps from the station \\ {{:wiki:step9.jpg?1000|}}