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diff --git a/2.3-1/macros/Hardware/RasberryPi/pcf/RPI_pcf8574Setup.sci b/2.3-1/macros/Hardware/RasberryPi/pcf/RPI_pcf8574Setup.sci
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+// Copyright (C) 2017 - IIT Bombay - FOSSEE
+//
+// This file must be used under the terms of the CeCILL.
+// This source file is licensed as described in the file COPYING, which
+// you should have received as part of this distribution.  The terms
+// are also available at
+// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
+// Organization: FOSSEE, IIT Bombay
+// Email: toolbox@scilab.in
+
+function RPI_pcf8574Setup(pinBase,i2cAddress)
+// Function for setting up PCF8574 8-bit GPIO expander IC
+//
+// Calling Sequence
+//  RPI_pcf8574Setup(pinBase,i2cAddress)
+//
+// Parameters
+//  pinBase   : any number above 64. The consecutive 8 pins will be allocated alongwith. 
+//  i2cAddress: I2C address obtained using RPI_i2cdetect function
+//
+// Description
+//  This function sets up the extension module for the PCF8574 8-bit GPIO expander IC. Can be called multiple times for multiple PCF8574 using different pinBase for each.
+//
+//You don’t need to specify the number of pins here – the PCF8754 has 8 pins.
+//
+// Examples
+//  RPI_pcf8574Setup(67,100)
+// See also
+//  RPI_pcf8591Setup
+//
+// Authors
+//  Jorawar Singh
+//
+// Bibliography
+//  http://wiringpi.com/reference/
+
+    commande="pf7#2#"+string(pinBase)+"#"+string(i2cAddress)+"#";
+    if getos=="Linux" then
+        unix_w("python -c ""import socket;s=socket.socket();s.connect((''"+RPI_piAdress+"'',9077));s.send(''"+commande+"'');print(s.recv(1024));s.close()""");
+    elseif getos=="Windows" then
+        RPI_winR=dos("python -c ""import socket;s=socket.socket();s.connect((''"+RPI_piAdress+"'',9077));s.send(''"+commande+"'');print(s.recv(1024));s.close()""");
+    end
+endfunction