Abstract: A computer-implemented method includes identifying a set of electronic commands for operation of an electronic device, identifying a guest user, and designating permissions for the guest user, command-by-command, in the set of electronic commands for operating the electronic device. A designated permission for an electronic command in the set of electronic commands includes either granting the guest user access to the electronic device with a privilege of using the electronic command to operate the electronic device, or denying the guest user access to the electronic device and the privilege of using the electronic command to operate the electronic device.

Abstract: An example technique includes storing, by an intermediary, a device registration information including at least for a target device, the device registration information including information identifying one or more commands supported by the device, and a device-specific ranking of each of a plurality of transports, receiving, by the intermediary a first message sent via a transport supported by the client application including a device identifier to identify a target device of a plurality of registered devices and a command information identifying a command that is supported by the target device and to be performed by the target device, selecting, by the intermediary, a transport supported by the target device based on the device-specific ranking of the plurality of transports supported by the target device, and sending, by the intermediary to the target device via the selected transport, a second message including at least the command information.