What OP is asking for is some software to remotely manage smartphones, IoT devices etc. this sort of thing; however would be great if he/she tell us what exactly he/she is trying to accomplish.
I am not experienced on MDM but all I know are proprietary stuff like Sophos, or Threema Work and such. In others words I am not aware of some agnostic MDM server but just about stuff built in purpose built proprietary software.