diff --git a/.DS_Store b/.DS_Store
index f1e3d11..5008ddf 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/socket/arduino/tcp_arduino_client/tcp_arduino_client.ino b/socket/arduino/tcp_arduino_client/tcp_arduino_client.ino
new file mode 100644
index 0000000..8dfa040
--- /dev/null
+++ b/socket/arduino/tcp_arduino_client/tcp_arduino_client.ino
@@ -0,0 +1,80 @@
+/*
+Original Code by Tom Igoe
+edited John Schimmel
+Source: https://github.com/johnschimmel/node-session
+
+Arduino connects over TCP to a NodeJS server,
+and NodeJS talks to the browser over socket.io passing information through.
+
+Update to new Ethernet.h syntax by Sergio Majluf 
+ITP - October 2013
+
+
+*/
+
+#include <SPI.h>
+#include <Ethernet.h>
+
+// Enter a MAC address of your Ethernet shield or Arduino.
+byte mac[] = {  
+   0x90, 0xA2, 0xDA, 0x00, 0x6C, 0xFE 
+};
+
+// Arduino's IP address, dependent on your network configuration
+IPAddress ip(192,168,0,225);
+
+// Node.js Server IP Address
+IPAddress server(192,168,0,133);
+
+int pin = 9; //pin on Arduino you want to toggle
+int pinVal = 0;
+
+// Create the Ethernet client
+EthernetClient client;
+
+void setup() {
+  // start the Ethernet connection:
+  Ethernet.begin(mac, ip);
+  // start the serial library:
+  Serial.begin(9600);
+  // give the Ethernet shield a second to initialize:
+  delay(1000);
+  Serial.println("connecting...");
+
+  // if you get a connection, report back via serial:
+  // The 1337 PORT is for the TCP server, not the Web Server (8090 in node.js setup)
+  if (client.connect(server, 1337)) {
+    Serial.println("connected");
+  } 
+  else {
+    // if you didn't get a connection to the server:
+    Serial.println("connection failed");
+  }
+
+  pinMode(pin, OUTPUT);
+}
+
+void loop()
+{
+  
+  //if you are connected and data is available
+  if (client.available()) {
+    char c = client.read();
+    Serial.print(c);
+
+    // '1' was received, return '1' for HIGH
+    if (c == '1') {
+      pinVal = HIGH;
+      client.print('1');
+    } 
+    else if (c == '0') {
+      pinVal = LOW;
+      client.print('0'); 
+    }
+    
+    //turn led pin to new position
+    digitalWrite(pin, pinVal);
+
+  }
+
+}