Fig. 3. (a) The Fall detector. (b) The device is worn on the user's belt. Fig. 4. (a) The RFID reader; (b) The passive RFID tags placed on the door jambs; (c)-(f) The tags placed on the refrigerator door, on a food container, on the coffee machine and on the door of the cupboard. June 2020 IEEE Instrumentation & Measurement Magazine 37