You can start from Wiki Project File Contents Codes MEGA MEGA.ino ESP ESP.ino Datasheets AD8232.pdf ATMega328P.pdf ArduinoUno.pdf Breadboard.pdf DHT11.pdf ESP8266.pdf LCD.pdf LED.pdf LM35.pdf PulseSensor.pdf Resistor.pdf Whitepaper 2019-01-15.jpeg 2019-01-22.jpeg 2019-01-29.jpeg 2019-02-05-1.jpeg 2019-02-05-2.jpeg 2019-03-07-1.jpeg 2019-03-07-2.jpeg 2019-03-07-3.jpeg Libraries Adafruit_Sensor-master.zip CH34x_Install_Windows_v3_4.EXE DHT_sensor_library.zip LiquidCrystal_I2C.zip wire.zip Links.md iot_based_healthcare_system.ino Project Components: Components Arduino UNO Board ESP8266 Wi-Fi Module Pulse Sensor AD8232 Ecg module LM35 Temperature Sensor DHT11 Temperature and Humidity Sensor 16x2 LCD Module Resistor 2K Resistor 1K RGB LED Breadboard Connecting Wires