1. FinEst Centre for Smart Cities, Tallinn University of Technology, 19086 Tallinn, Estonia
2. Department of Electrical Power Engineering & Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
3. Department of Computer Systems, Tallinn University of Technology, 11712 Tallinn, Estonia
4. Department of Software Science, Tallinn University of Technology, 11712 Tallinn, Estonia