/*
==== Find and Fix the Bugs Set B ====
       Author: Roberto Palozzo
=====================================
*/

int ledPin = 4;                          // FIX 1: was "2ledPin" — an identifier can't start with a digit (pin set to 4 for the actual wiring).
float temperature = 23.5;                // FIX 2: was "23.5" in quotes — a float can't be assigned a string.
String deviceName = "Node1";             // FIX 3: was "device name" with a space — identifiers can't contain spaces.

void setup() 
{
  Serial.begin(9600);
  Serial.println("Ready");
  pinMode(ledPin, OUTPUT);               // pin set as output, now consistent with the corrected ledPin name
}

void loop() {
  digitalWrite(ledPin, HIGH);
  delay(500);
  digitalWrite(ledPin, LOW);
  delay(500);
}