# Data logger using Network Variable List from PLC **URL:** \ **Category:** Hardware and Linux\ **Created:** [June 24, 2026, 6:58am UTC](https://www.wago.community/t/data-logger-using-network-variable-list-from-plc/2788 "2026-06-24T06:58:04Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![damienexail](https://avatars.discourse-cdn.com/v4/letter/d/b2d939/32.png) [@damienexail](https://www.wago.community/u/damienexail)\ **Post date:** [June 24, 2026, 6:58am UTC](https://www.wago.community/t/data-logger-using-network-variable-list-from-plc/2788/1 "2026-06-24T06:58:04Z")
Hello, I would like create a data recorder by using the Network Variable generated by my PLCs. The idea is to use a raspberry, collect informations on the network and write it on a big SD or USB. I can use a CPU PLC just for that but it is sad and i will be limited by the limit of data storage. Is it possible to decrypt UDP transmission for NVL? ---
**Author:** ![WagoDamRud](https://sea2.discourse-cdn.com/flex016/user_avatar/www.wago.community/wagodamrud/32/258_2.png) [@WagoDamRud](https://www.wago.community/u/WagoDamRud)\ **Post date:** [June 24, 2026, 11:41am UTC](https://www.wago.community/t/data-logger-using-network-variable-list-from-plc/2788/2 "2026-06-24T11:41:12Z")
NVL is not encypted. You just need to open port 1202 (default for NVL) , listen and use your “template” to see what is inside. Check [node-red-contrib-nvl (node) - Node-RED](https://flows.nodered.org/node/node-red-contrib-nvl) or node.js [jisotalo/codesys-client: Node.js Codesys client for reading and writing PLC data using network variable lists (NVL)](https://github.com/jisotalo/codesys-client) ---
**Author:** ![damienexail](https://avatars.discourse-cdn.com/v4/letter/d/b2d939/32.png) [@damienexail](https://www.wago.community/u/damienexail)\ **Post date:** [June 24, 2026, 11:48am UTC](https://www.wago.community/t/data-logger-using-network-variable-list-from-plc/2788/3 "2026-06-24T11:48:23Z")
Thanks 🙂 We will work on that