To effectively test parts of the Internet of Things (IoT) systems having a character of a state machine, Model-based Testing (MBT) approach can be taken. In MBT, a model of a system is created, and test cases generated automatically from the model, and a number of current strategies exist. In this paper we propose a novel alternative strategy, that concurrently allows to flexibly adjust the preferred length of the generated test cases, as well as to mark the states, in which the test case can start and end. Compared with an intuitive N-switch coverage-based strategy that aims at the same goals, our proposal generates a lower number of shorter test cases with less test step duplications.