To set up ESP8266 with pulse sensor, a voltage regulator circuit need to be set up. In this diagram, a 10k ohm and 4.7k ohm resistor were used along with 10uF capacitor. Voltage regulator has been made in this circuit to make it operate within 3.3V. Figure and table below shows the connection between ESP8266 NodeMCU with pulse sensor, resistor and capacitor. Since the ESP8266 NodeMCU and pulse sensor component were not available in Fritzing skecting, the components were substitute with the nearly same component. After set up the circuit, the ESP8266 NodeMCU will be connected with th USB cable. Connection of Pulse Sensor, ESP8266 with Voltage Regulator The following shows the main connection and wire connection of the circuit; Connection Wire Connection Pulse Sensor (GND)------ESP8266 (GND) Pulse Sensor (VCC)------ESP8266 (Vs) Pulse Sensor (A0)---------4.7kohm 4.7kohm--------------------ESP8266 (A0) 1...