Question

Write code to make pin A0 (Analog 0) on the NodeMCU an input,
and read its voltage into currentVoltage (declare this as a double).
Put your code inside setup(), below. Do not use loop().

void setup(){

       

}

Answer 1

Once the circuit part is done, NodeMCU is needed to be programmed. Here is the code to run this circuit on NodeMCU.

// Robo India Tutorial

// Digital Input and Output on LED

// Hardware: NodeMCU

const int analog_ip = A0; //Naming analog input pin

const int LED = 0;        //Naming LED Pin

int inputVal = 0;        //Variable to store analog input values

void setup() {

  pinMode(LED, OUTPUT); // Defining pin as output

  Serial.begin(9600);    // Initiating Serial communication

}                                                                                                                                                                                                                           

void loop() {

  inputVal = analogRead (analog_ip); // Analog Values 0 to 1023

  Serial.println (inputVal);

  analogWrite(LED, inputVal/4);      // Mapping 0 to 255

  delay(1000);

}