diff --git a/Phpmodbus/ModbusMaster.php b/Phpmodbus/ModbusMaster.php
index 18451ca..e115d11 100644
--- a/Phpmodbus/ModbusMaster.php
+++ b/Phpmodbus/ModbusMaster.php
@@ -1,12 +1,12 @@
 <?php
 /**
- * Phpmodbus Copyright (c) 2004, 2012 Jan Krakora
+ * Phpmodbus Copyright (c) 2004, 2013 Jan Krakora
  *  
  * This source file is subject to the "PhpModbus license" that is bundled
  * with this package in the file license.txt.
  *   
  *
- * @copyright  Copyright (c) 2004, 2012 Jan Krakora
+ * @copyright  Copyright (c) 2004, 2013 Jan Krakora
  * @license PhpModbus license 
  * @category Phpmodbus
  * @tutorial Phpmodbus.pkg 
@@ -27,13 +27,15 @@ require_once dirname(__FILE__) . '/PhpType.php';
  *   - FC  1: read coils
  *   - FC  2: read input discretes
  *   - FC  3: read multiple registers
+ *   - FC  4: read multiple input registers 
+ *   - FC  5: write single coil  
  *   - FC  6: write single register
  *   - FC 15: write multiple coils
  *   - FC 16: write multiple registers
  *   - FC 23: read write registers
  *   
  * @author Jan Krakora
- * @copyright  Copyright (c) 2004, 2012 Jan Krakora
+ * @copyright  Copyright (c) 2004, 2013 Jan Krakora
  * @package Phpmodbus  
  *
  */
@@ -512,6 +514,207 @@ class ModbusMaster {
     return $data;
   }
   
+  /**
+   * readMultipleInputRegisters
+   *
+   * Modbus function FC 4(0x04) - Read Multiple Input Registers.
+   * 
+   * This function reads {@link $quantity} of Words (2 bytes) from reference 
+   * {@link $referenceRead} of a memory of a Modbus device given by 
+   * {@link $unitId}.
+   *    
+   *
+   * @param int $unitId usually ID of Modbus device 
+   * @param int $reference Reference in the device memory to read data.
+   * @param int $quantity Amounth of the data to be read from device.
+   * @return false|Array Success flag or array of received data.
+   */
+  function readMultipleInputRegisters($unitId, $reference, $quantity){
+    $this->status .= "readMultipleInputRegisters: START\n";
+    // connect
+    $this->connect();
+    // send FC 4    
+    $packet = $this->readMultipleInputRegistersPacketBuilder($unitId, $reference, $quantity);
+    $this->status .= $this->printPacket($packet);    
+    $this->send($packet);
+    // receive response
+    $rpacket = $this->rec();
+    $this->status .= $this->printPacket($rpacket);    
+    // parse packet    
+    $receivedData = $this->readMultipleInputRegistersParser($rpacket);
+    // disconnect
+    $this->disconnect();
+    $this->status .= "readMultipleInputRegisters: DONE\n";
+    // return
+    return $receivedData;
+  }
+  
+  /**
+   * fc4
+   *
+   * Alias to {@link readMultipleInputRegisters} method.
+   *
+   * @param int $unitId
+   * @param int $reference
+   * @param int $quantity
+   * @return false|Array
+   */
+  function fc4($unitId, $reference, $quantity){
+    return $this->readMultipleInputRegisters($unitId, $reference, $quantity);
+  }  
+  
+  /**
+   * readMultipleInputRegistersPacketBuilder
+   *
+   * Packet FC 4 builder - read multiple input registers
+   *
+   * @param int $unitId
+   * @param int $reference
+   * @param int $quantity
+   * @return string
+   */
+  private function readMultipleInputRegistersPacketBuilder($unitId, $reference, $quantity){
+    $dataLen = 0;
+    // build data section
+    $buffer1 = "";
+    // build body
+    $buffer2 = "";
+    $buffer2 .= iecType::iecBYTE(4);                                                // FC 4 = 4(0x04)
+    // build body - read section    
+    $buffer2 .= iecType::iecINT($reference);                                        // refnumber = 12288      
+    $buffer2 .= iecType::iecINT($quantity);                                         // quantity
+    $dataLen += 5;
+    // build header
+    $buffer3 = '';
+    $buffer3 .= iecType::iecINT(rand(0,65000));                                     // transaction ID
+    $buffer3 .= iecType::iecINT(0);                                                 // protocol ID
+    $buffer3 .= iecType::iecINT($dataLen + 1);                                      // lenght
+    $buffer3 .= iecType::iecBYTE($unitId);                                          // unit ID
+    // return packet string
+    return $buffer3. $buffer2. $buffer1;
+  }
+  
+  /**
+   * readMultipleInputRegistersParser
+   *
+   * FC 4 response parser
+   *
+   * @param string $packet
+   * @return array
+   */
+  private function readMultipleInputRegistersParser($packet){    
+    $data = array();
+    // check Response code
+    $this->responseCode($packet);
+    // get data
+    for($i=0;$i<ord($packet[8]);$i++){
+      $data[$i] = ord($packet[9+$i]);
+    }    
+    return $data;
+  }
+  
+  /**
+   * writeSingleCoil
+   *
+   * Modbus function FC5(0x05) - Write Single Register.
+   *
+   * This function writes {@link $data} single coil at {@link $reference} position of 
+   * memory of a Modbus device given by {@link $unitId}.
+   *
+   *
+   * @param int $unitId usually ID of Modbus device 
+   * @param int $reference Reference in the device memory (e.g. in device WAGO 750-841, memory MW0 starts at address 12288)
+   * @param array $data value to be written (TRUE|FALSE).
+   * @return bool Success flag
+   */       
+  function writeSingleCoil($unitId, $reference, $data){
+    $this->status .= "writeSingleCoil: START\n";
+    // connect
+    $this->connect();
+    // send FC5    
+    $packet = $this->writeSingleCoilPacketBuilder($unitId, $reference, $data);
+    $this->status .= $this->printPacket($packet);    
+    $this->send($packet);
+    // receive response
+    $rpacket = $this->rec();
+    $this->status .= $this->printPacket($rpacket);    
+    // parse packet
+    $this->writeSingleCoilParser($rpacket);
+    // disconnect
+    $this->disconnect();
+    $this->status .= "writeSingleCoil: DONE\n";
+    return true;
+  }
+
+
+  /**
+   * fc5
+   *
+   * Alias to {@link writeSingleCoil} method
+   *
+   * @param int $unitId
+   * @param int $reference
+   * @param array $data
+   * @param array $dataTypes
+   * @return bool
+   */
+  function fc5($unitId, $reference, $data, $dataTypes){    
+    return $this->writeSingleCoil($unitId, $reference, $data, $dataTypes);
+  }
+
+
+  /**
+   * writeSingleCoilPacketBuilder
+   *
+   * Packet builder FC5 - WRITE single register
+   *
+   * @param int $unitId
+   * @param int $reference
+   * @param array $data
+   * @param array $dataTypes
+   * @return string
+   */
+  private function writeSingleCoilPacketBuilder($unitId, $reference, $data){
+    $dataLen = 0;
+    // build data section
+    $buffer1 = "";
+    foreach($data as $key=>$dataitem) {
+      if($dataitem == TRUE){
+       $buffer1 = iecType::iecINT(0xFF00);
+      } else {
+       $buffer1 = iecType::iecINT(0x0000);
+      };
+    };
+    $dataLen += 2;
+    // build body
+    $buffer2 = "";
+    $buffer2 .= iecType::iecBYTE(5);             // FC5 = 5(0x05)
+    $buffer2 .= iecType::iecINT($reference);      // refnumber = 12288
+    $dataLen += 3;
+    // build header
+    $buffer3 = '';
+    $buffer3 .= iecType::iecINT(rand(0,65000));   // transaction ID    
+    $buffer3 .= iecType::iecINT(0);               // protocol ID    
+    $buffer3 .= iecType::iecINT($dataLen + 1);    // lenght    
+    $buffer3 .= iecType::iecBYTE($unitId);        //unit ID    
+    
+    // return packet string
+    return $buffer3. $buffer2. $buffer1;
+  }
+  
+  /**
+   * writeSingleCoilParser
+   *
+   * FC5 response parser
+   *
+   * @param string $packet
+   * @return bool
+   */
+  private function writeSingleCoilParser($packet){
+    $this->responseCode($packet);
+    return true;
+  }
+  
   /**
    * writeSingleRegister
    *
diff --git a/README.md b/README.md
index 7795e78..c189d18 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 phpmodbus
 =========
 This project deals with an implementation of the basic functionality of the Modbus TCP and UDP based protocol using PHP.
-It's a copy of the releases from the project page over at [Google Code](https://code.google.com/p/phpmodbus/) with 
+It's a copy of the releases from the project page over at [Google Code](https://code.google.com/p/phpmodbus/) with
 composer support added.
 
 Features
@@ -11,6 +11,8 @@ Features
     * FC1 - Read coils
     * FC2 - Read input discretes
     * FC3 - Read holding registers
+    * FC4 - Read holding input registers
+    * FC5 - Write single coil
     * FC6 - Write single register
     * FC15 - Write multiple coils
     * FC16 - Write multiple registers
@@ -21,10 +23,10 @@ Example
 
 ```php
  // Modbus master UDP
- $modbus = new ModbusMaster("192.168.1.1", "UDP"); 
+ $modbus = new ModbusMaster("192.168.1.1", "UDP");
  // Read multiple registers
  try {
-     $recData = $modbus->readMultipleRegisters(0, 12288, 5); 
+     $recData = $modbus->readMultipleRegisters(0, 12288, 5);
  }
  catch (Exception $e) {
      // Print error information if any
@@ -35,3 +37,8 @@ Example
  // Print data in string format
  echo PhpType::bytes2string($recData);
 ```
+
+For more see [documentation][] or [FAQ][].
+
+[documentation]: https://code.google.com/p/phpmodbus/downloads/list
+[FAQ]: https://code.google.com/p/phpmodbus/wiki/FAQ
diff --git a/examples/example_fc4.php b/examples/example_fc4.php
new file mode 100644
index 0000000..cb75cf9
--- /dev/null
+++ b/examples/example_fc4.php
@@ -0,0 +1,19 @@
+<?php
+
+require_once dirname(__FILE__) . '/../../Phpmodbus/ModbusMasterUdp.php';
+
+// Create Modbus object
+$modbus = new ModbusMasterUdp("192.192.15.51");
+
+try {
+    // Read input discretes - FC 4
+    $recData = $modbus->readMultipleInputRegisters(0, 0, 2);
+}
+catch (Exception $e) {
+    // Print error information if any
+    echo $modbus;
+    echo $e;
+    exit;
+}
+
+var_dump($recData);
\ No newline at end of file
diff --git a/examples/example_fc5.php b/examples/example_fc5.php
new file mode 100644
index 0000000..764a805
--- /dev/null
+++ b/examples/example_fc5.php
@@ -0,0 +1,24 @@
+<?php
+
+require_once dirname(__FILE__) . '/../../Phpmodbus/ModbusMasterUdp.php';
+
+// Create Modbus object
+$modbus = new ModbusMasterUdp("192.192.15.51");
+
+// Data to be writen - TRUE, FALSE
+$data_true = array(TRUE);
+$data_false = array(FALSE);
+
+try {
+    // Write single coil - FC5
+    $modbus->writeSingleCoil(0, 12288, $data_true);
+    $modbus->writeSingleCoil(0, 12289, $data_false);
+    $modbus->writeSingleCoil(0, 12290, $data_true);
+    $modbus->writeSingleCoil(0, 12291, $data_false);
+}
+catch (Exception $e) {
+    // Print error information if any
+    echo $modbus;
+    echo $e;
+    exit;
+}
diff --git a/tests/ModbusMasterUdp/ref/test.fc4.php.html b/tests/ModbusMasterUdp/ref/test.fc4.php.html
new file mode 100644
index 0000000..4cbe5ae
--- /dev/null
+++ b/tests/ModbusMasterUdp/ref/test.fc4.php.html
@@ -0,0 +1,11 @@
+Test should pass when %IX0.0==FALSE and %IX0.1==TRUE
+array(4) {
+  [0]=>
+  int(0)
+  [1]=>
+  int(2)
+  [2]=>
+  int(0)
+  [3]=>
+  int(0)
+}
diff --git a/tests/ModbusMasterUdp/ref/test.fc5.php.html b/tests/ModbusMasterUdp/ref/test.fc5.php.html
new file mode 100644
index 0000000..a6a24be
--- /dev/null
+++ b/tests/ModbusMasterUdp/ref/test.fc5.php.html
@@ -0,0 +1,5 @@
+Array
+(
+    [0] => 0
+    [1] => 5
+)
diff --git a/tests/ModbusMasterUdp/test.fc4.php b/tests/ModbusMasterUdp/test.fc4.php
new file mode 100644
index 0000000..dee4929
--- /dev/null
+++ b/tests/ModbusMasterUdp/test.fc4.php
@@ -0,0 +1,14 @@
+<?php
+require_once dirname(__FILE__) . '/../../Phpmodbus/ModbusMasterUdp.php';
+require_once dirname(__FILE__) . '/../config.php';
+
+// Create Modbus object
+$modbus = new ModbusMasterUdp($test_host_ip);
+
+// Test requirements
+echo "Test should pass when %IX0.0==FALSE and %IX0.1==TRUE\n";
+
+// Read input discretes - FC 4
+$recData = $modbus->readMultipleInputRegisters(0, 0, 2);
+
+var_dump($recData);
\ No newline at end of file
diff --git a/tests/ModbusMasterUdp/test.fc5.php b/tests/ModbusMasterUdp/test.fc5.php
new file mode 100644
index 0000000..95e6f92
--- /dev/null
+++ b/tests/ModbusMasterUdp/test.fc5.php
@@ -0,0 +1,23 @@
+<?php
+require_once dirname(__FILE__) . '/../../Phpmodbus/ModbusMasterUdp.php';
+require_once dirname(__FILE__) . '/../config.php';
+
+// Create Modbus object
+$modbus = new ModbusMasterUdp($test_host_ip);
+
+// Data to be writen - TRUE, FALSE
+$data_true = array(TRUE);
+$data_false = array(FALSE);
+
+// Reset target WORD
+$modbus->writeSingleRegister(0, 12288, array(0), array('WORD'));
+
+// Write single coil - FC5
+$modbus->writeSingleCoil(0, 12288, $data_true);
+$modbus->writeSingleCoil(0, 12289, $data_false);
+$modbus->writeSingleCoil(0, 12290, $data_true);
+$modbus->writeSingleCoil(0, 12291, $data_false);
+
+// Read data - FC3
+$recData = $modbus->readMultipleRegisters(0, 12288, 1);
+print_r($recData);
diff --git a/tests/config.php b/tests/config.php
index f458917..9c71b4a 100644
--- a/tests/config.php
+++ b/tests/config.php
@@ -1,3 +1,3 @@
 <?php
-  $test_host_ip = "192.168.1.105";  
-  $test_bind_client_ip = "192.168.1.106";
\ No newline at end of file
+  $test_host_ip = "192.192.1.10";  
+  $test_bind_client_ip = "192.192.1.100";
\ No newline at end of file
diff --git a/tutorials/Phpmodbus/Phpmodbus.pkg b/tutorials/Phpmodbus/Phpmodbus.pkg
index 1bb1318..d3e57ea 100644
--- a/tutorials/Phpmodbus/Phpmodbus.pkg
+++ b/tutorials/Phpmodbus/Phpmodbus.pkg
@@ -24,6 +24,8 @@
      <listitem><para>FC  1: read multiple coils</para></listitem>
      <listitem><para>FC  2: read input discretes</para></listitem>
      <listitem><para>FC  3: read multiple registers</para></listitem>
+     <listitem><para>FC  4: read multiple input registers</para></listitem>
+     <listitem><para>FC  5: write single coil</para></listitem>
      <listitem><para>FC  6: write single register</para></listitem>
      <listitem><para>FC 15: write multiple coils</para></listitem>
      <listitem><para>FC 16: write multiple registers</para></listitem>
@@ -121,6 +123,24 @@ catch (Exception $e) {
     {@example example_fc3.php}
     </para>
   </refsect2>
+  <refsect2 id="{@id example_fc4}">
+    <title>FC4 - read multiple input registers </title>
+    <para>
+      FC4 functionality example
+    </para>
+    <para>
+    {@example example_fc4.php}
+    </para>
+  </refsect2>
+  <refsect2 id="{@id example_fc5}">
+    <title>FC5 - write single coil</title>
+    <para>
+      FC5 functionality example
+    </para>
+    <para>
+    {@example example_fc5.php}
+    </para>
+  </refsect2>
   <refsect2 id="{@id example_fc6}">
     <title>FC6 - write single register</title>
     <para>