Client-id without "-" in the name

My RUT240 need to subscribe to a topic of a MQTT broker that need a specific “client-id” to allow the communication. My problem is that RUT240 doesn’t allow the sign “-” (minus) in the “client-id” field. Why? In RUT956 for example I don’t have this problem, the sign “-” is allowed

Hello,

Could you please let me know the firmware version currently installed on your RUT240 and RUT956 devices?

Best regards,

RUT240 has firmware RUT2_R_00.07.06.19

RUT956 has firmware RUT9M_R_00.07.14.3

Thank you

Thank you for the information.

I will create a ticket for our RnD team and ask whether any changes can be made to the RUT240 firmware.
I’ll get back to you as soon as I receive any feedback from them.

Best regards,