Arduino code for stupid guage

guage.ino

#include <SPI.h>
#include <Ethernet.h>
#include <Servo.h>

Servo guageServo;

byte mac[] = {
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1,177);
int port = 3000;
IPAddress server(192,168,1,106);

float MAX_ROTATION = 180.0f;
int SERVO_PIN      = 9;
EthernetClient client;
String clientMsg = "";

void setup() {
  Serial.begin(9600);
  Ethernet.begin(mac, ip);
  Serial.println("Conecting.");
  client.connect(server, port);
  
  rotate(0);
  delay(2000);
  rotate(1);
  delay(2000);
  rotate(0);
}

float lastRotation = 0;

void rotate(float progress) {
  
  int rotation   = MAX_ROTATION - progress * MAX_ROTATION;
  if (lastRotation == rotation) {
    guageServo.attach(SERVO_PIN);
  } else {
    guageServo.attach(SERVO_PIN);
    Serial.println("Rotation: ");
    Serial.println(rotation);
    Serial.println("Progress: ");
    Serial.println(progress);
    guageServo.write(rotation);
    delay(1000);
    guageServo.detach();
    lastRotation = rotation;
  }
}

void loop() {

  if (client.available()) {
    char c = client.read();
    if (c == '\n') {
      Serial.println("Message from Client:"+clientMsg);
      char buf[clientMsg.length()];
      clientMsg.toCharArray(buf,clientMsg.length());
      float progress = atof(buf);
      rotate(progress);
      
      clientMsg = "";
    } else {
      clientMsg += c;
    }
  }


  // if the server's disconnected, stop the client:
  if (!client.connected()) {
    Serial.println();
    Serial.println("disconnecting.");
    client.stop();
    delay(1000);
    Serial.println("Conecting.");
    client.connect(server, port);
  }
}

server.rb

require 'socket'

maximum_load = 8.0
puts "Starting"
server = TCPServer.new(3000)
puts "Listening"
loop do
  client = server.accept
  puts "Accepted client"
  while true
    sleep 1
    begin
      current_load = (`cat /proc/loadavg`.split(" ")[0].to_f * 100.0).round / 100.0
      total_load   = (current_load / maximum_load).to_s
      puts "[#{Time.now.to_s}] Sending: " + total_load
      client.puts total_load + "\n"
    rescue Errno::EPIPE, Errno::ECONNRESET
      break
    end  
  end
  puts "Closing connection"
  client.close
end