A network device enables browsing of a plurality of pre-defined VMs associated with IoT devices. The network device receives, from a user device, selection of a first pre-defined VM from the plurality of pre-defined VMs, wherein the first pre-defined VM includes at least one first device state and at least one first sensor type, and receives, from the user device, instructions to modify the first pre-defined VM, by adding an additional device state or an additional sensor type to the first pre-defined VM or by removing the at least one first device state or the at least one first sensor type from the first pre-defined VM, to create a first customized VM associated with a first physical IoT device. The network device stores the first customized VM in a database, and uses the first customized VM for accessing or controlling the first physical IoT device.