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By mistake, I bought five RUT240 instead of five TRB140.
I need the devices exclusively for sending status SMS.
How can I configure the RUT240 so that neither WiFi nor mobile data are used?
The communication must run exclusively in this direction:
Server ==http==> [LAN] RUT240 ==SMS==> Mobile phone
How can I disable mobile data completely and allow only SMS sending?
Thank you very much!