Table 3.

List of sensors and their application in the smart healthcare system.

Sr. no.	Name of sensors	Description	Applications	Belonging domain
1	Accelerometers	Measures acceleration	Detects glucose level in blood [8], human motion [70], and body movement [74].	Home care
2	Gyroscope	Detects angular velocity	Detects human tilt and provides an alert system for a problematic scenario [75].	Acute care
3	Magnetometer	Detects magnetic field and relative orientation	When used in combination with a gyroscope and an accelerometer, it is capable of detecting human fall, and it is mostly used in elderly devices [30].	Acute care
4	LM35	Senses body temperature	This sensor varies voltage with changes in temperature in centigrade [76–78]. It is used for measuring body temperature.	Selfcare
5	DHT11	Humidity and temperature sensor	This sensor can be used to measure temperature between 0°C and 50°C and humidity between 20% and 90%. It is a low-power consuming sensor with 5% accuracy [71, 77, 78]. It is used for measuring environmental conditions.	Selfcare/home care
6	AD8232	Electrocardiogram sensor	It analyzes heart signals, irrespective of the body state of person under examination [71, 79, 80].	Home care/acute care
7	ADXL335	Body position sensor	This sensor helps in proper positioning to prevent various complications, such as body sore, swelling, pain, or respiratory problems [71].	Selfcare
8	MAX 30105	Sensor monitors heart rate	This integrated optical sensor with 2 LEDs in a single photo detector processes low noise analog signal in combination with Ardunio to monitor heart rate in between 1.8 V and 3.3 V [71, 79, 81].	Selfcare/home care