• If it is a numerical digit (i.e. between '0' and '9'), it converts the digit to a number and (as an example) scales it to a servo angle (by multiplying by 20, which roughly maps 0–9 to 0–180).
• Otherwise, if the character equals 'A', 'B', 'E', or 'F', it performs the corresponding motor actions using analogWrite on izqA and izqB.

Cpp
#include <SoftwareSerial.h>
#include <Servo.h>

Servo miservo;
char valor;  // Variable to store the received character

int bluetoothTx = 10;
int bluetoothRx = 11;
int izqA = 7;
int izqB = 8;

SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);

void setup() {
  Serial.begin(9600);
  pinMode(izqA, OUTPUT);
  pinMode(izqB, OUTPUT);
  miservo.attach(9);
  
  bluetooth.begin(9600);
}

void loop() {
  if (bluetooth.available() > 0) {
    // Read one character from Bluetooth
    valor = bluetooth.read();
    Serial.print("Received: ");
    Serial.println(valor);
    
    // Example handling for a numeric command (for servo control)
    if (valor >= '0' && valor <= '9') {
      // Convert the digit character (0-9) to an int and scale it to 0-180 servo range.
      int servopos = (valor - '0') * 20;  
      Serial.print("Servo Pos: ");
      Serial.println(servopos);
      miservo.write(servopos);
    }
    
    // Control motor based on letter commands
    if (valor == 'A') {
      analogWrite(izqA, 0);
      analogWrite(izqB, 100);
    } 
    else if (valor == 'B') {
      analogWrite(izqA, 100);
      analogWrite(izqB, 0);
    } 
    else if (valor == 'E' || valor == 'F') {
      analogWrite(izqA, 0);
      analogWrite(izqB, 0);
    }
  }
}