@oja said:

Maybe the way exists.

You can use Javascript with imported FileInputStream and FileOutputStream. Or, you can create JAVA library for CSV file controlling and import to Javascript in datapoint.
I am using this for serial communication with unsuported protocols etc. Siemens Elan protocol.

Please, describe your requirements for CSV access.

Oja
Hi, that's exactly what I need
I wish to read some datapoints BOTH via Modbus/TCP when my device is online, and to read same datapoints stored locally in devices filesystem and uploaded to my server via some backup connection, in roder not to lose recordings on unreliable networks. Could you please explain better how to implement such a Javascript task and to integrate into Mango, or address me to a working example ?

This a great solution to the problem of my kids and/or wife closing the Tomcat window. Grrrrrr. Of course no one ever owns up to it!