“…Over the years, several prototypes have been built with different sensors such as ECG, RFID, BP Sensor, and PIR Sensor [19][20][21][22][23]. Additionally, the field also uses microcontrollers such as Arduino, STM32 Microcontroller, ARM7, Intel Galileo, and Raspberry Pi, [22,[24][25][26][27][28]. The communication protocols used were MQTT, BLE, GSM, ZigBee, LoRaWAN, and GPRS [27,[29][30][31][32][33][34][35].…”