diff --git a/lib/api/source/deploy.php b/lib/api/source/deploy.php
index eb12000..c4b44a5 100755
--- a/lib/api/source/deploy.php
+++ b/lib/api/source/deploy.php
@@ -118,6 +118,30 @@
 		$f = null;
 
 
+
+		/* [6] Remove history entries
+		=========================================================*/
+		/* (1) Check history entries count */
+		if( !isset($arr_r['saved']) || !is_array($arr_r['saved']) )
+			return 127;
+
+		/* (2) Check history count */
+		if( !isset($arr_r['saved']['history']) || !is_numeric($arr_r['saved']['history']) )
+			return 127;
+
+		/* (3) Fetch number of entries */
+		$saved = intval($arr_r['saved']['history']);
+		$saved = $saved < 0 ? 0 : $saved; // prevent negative
+
+		/* (4) Truncate the log file */
+		$saved++; // because need to be excluded
+		$truncated = syscall(SOURCE_DIR."/lib/file/truncate mfrc522 {$saved}");
+
+		/* (5) Manage error */
+		if( $truncated === false )
+			return 127;
+
+
 		return 0;
 	}
 
diff --git a/lib/file/source/set.php b/lib/file/source/set.php
new file mode 100755
index 0000000..457c706
--- /dev/null
+++ b/lib/file/source/set.php
@@ -0,0 +1,102 @@
+#!/usr/bin/php
+
+<?php
+
+	require_once __DIR__.'/../../include/php/const';
+
+
+	function globalstate_set($p_id_chip, $p_state){
+
+		$g_pins  = null;
+		$g_state = null;
+
+
+
+		/* [1] Cache chips
+		=========================================================*/
+		/* (1) Get file handler */
+		$f_chips = new SplFileObject(CHIPS_CONF, 'r');
+
+		/* (2) Parse line by line */
+		while( !$f_chips->eof() ){
+
+			// {1} Try to parse current line //
+			$parsed = json_decode($f_chips->fgets(), true);
+
+			// {2} If cannot parse, go to next //
+			if( is_null($parsed) )
+				continue;
+
+			// {3} Check if choosen pin //
+			if( $parsed[0] == $p_id_chip ){
+
+				// store pin list
+				$g_pins = $parsed[1];
+
+				/* (3) Check if choosen state */
+				foreach($parsed[2] as $state=>$pinValues){
+
+					if( "$state" === "$p_state" ){
+						
+						// store state values
+						$g_state = $pinValues;
+						break;
+					}
+
+				}
+
+				break;
+			}
+		}
+
+		/* (3) If chip not found -> abort */
+		if( is_null($g_pins) || is_null($g_state) ){
+			slog("Chip $p_id_chip not found", 'global-state:set');
+			return 127;
+		}
+			
+
+
+		/* [2] Set chip to choosen state
+		=========================================================*/
+		/* (1) Activate pin + set OUT mode */
+		foreach($g_pins as $pinNumber)
+
+			// if failed -> propagate error
+			if( syscall(SOURCE_DIR."/lib/gpio/out {$pinNumber}") == false ){
+				slog("Chip $p_id_chip cannot be set to OUT mode", 'global-state:set');
+				return 127;
+			}
+
+		/* (2) For each pin, set the associated value */
+		foreach($g_state as $pinIndex=>$pinValue){
+
+			// set value to HIGH if not 0 //
+			if( $pinValue !== 0 )
+				syscall(SOURCE_DIR."/lib/gpio/high ".$g_pins[$pinIndex]);
+			else
+				syscall(SOURCE_DIR."/lib/gpio/low ".$g_pins[$pinIndex]);
+
+		}
+
+
+		return 0;
+
+	}
+
+
+	/* [1] Check argument (chip position, chip state)
+	=========================================================*/
+	if( $argc < 3 || !preg_match('@^\d+$@', $argv[1]) || !preg_match('@^[A-Za-z0-9]{1}$@', $argv[2]) ){
+		echo 127;
+		die(127);
+	}
+
+	/* [2] Launch main script
+	=========================================================*/
+	$exec = globalstate_set($argv[1], $argv[2]);
+
+	echo $exec;
+	die($exec);
+?>
+
diff --git a/lib/file/source/update.php b/lib/file/source/update.php
new file mode 100755
index 0000000..13688e7
--- /dev/null
+++ b/lib/file/source/update.php
@@ -0,0 +1,140 @@
+#!/usr/bin/php
+
+<?php
+
+	require_once __DIR__.'/../../include/php/const';
+
+
+	function globalstate_update(){
+
+
+		/* [1] Fetch global state
+		=========================================================*/
+		$GLOBAL_STATE = [];
+
+		/* (1) Fetch from file */
+		$f_gstate = @file_get_contents(STATE_CONF);
+
+		/* (2) Manage errors */
+		if( $f_gstate === false ){
+			slog('Cannot access GLOBAL STATE file', 'global-state:update');
+			return 127;
+		}
+
+		/* (3) Remove surrounding spaces */
+		$f_gstate = preg_replace('@^\s+@', '', $f_gstate);
+		$f_gstate = preg_replace('@\s+$@', '', $f_gstate);
+
+		/* (4) Extract */
+		$GLOBAL_STATE = $f_gstate;
+
+
+		/* [2] Cache global state to chip states
+		=========================================================*/
+		$CHIP_STATE = null;
+
+		/* (1) Fetch from file */
+		$f_cstates = new SplFileObject(STATES_CONF, 'r');
+
+		/* (2) Section Title */
+		if( $f_cstates === false ){
+			slog('Cannot access GLOBAL/CHIP STATES file', 'global-state:update');
+			return 127;
+		}
+
+		/* (3) Parse line by line */
+		while( !$f_cstates->eof() ){
+
+			// {1} Try to parse current line //
+			$parsed = json_decode($f_cstates->fgets(), true);
+
+			// {2} If cannot parse, go to next //
+			if( is_null($parsed) )
+				continue;
+
+			// {3} Check if GLOBAL STATE matches CURRENT state //
+			$failed = false;
+
+			for( $c = 0 ; $c < strlen($GLOBAL_STATE) || $c < strlen($parsed[0]) ; $c++ ){
+				// {3.1} If 'X' -> whatever state //
+				if( $parsed[0][$c] == 'X' )
+					continue;
+
+				// {3.2} Else, if different -> fail //
+				else if( $parsed[0][$c] != $GLOBAL_STATE[$c] ){
+					$failed = true;
+					break;
+				}
+					
+			}
+
+			// {4} If not failed -> state to keep //
+			if( !$failed ){
+				slog("Current state '$GLOBAL_STATE' matches '{$parsed[0]}'", 'global-state:update');
+				$CHIP_STATE = $parsed[1];
+				break;
+			}
+
+		}
+
+		/* (4) If no CHIP_STATE set -> abort */
+		if( is_null($CHIP_STATE) ){
+			slog("Cannot find a chip_state for the current global state '{$GLOBAL_STATE}'", 'global-state');
+			return 127;
+		}
+
+
+
+
+		/* [2] Update chips
+		=========================================================*/
+		/* (1) Get file handler */
+		$f_chips = new SplFileObject(CHIPS_CONF, 'r');
+
+		/* (2) Parse line by line */
+		while( !$f_chips->eof() ){
+
+			// {1} Try to parse current line //
+			$parsed = json_decode($f_chips->fgets(), true);
+
+			// {2} If cannot parse, go to next //
+			if( is_null($parsed) )
+				continue;
+
+			// {3} Check if position available in GLOBAL_STATE //
+			if( isset($CHIP_STATE[$parsed[0]]) ){
+
+				/* (1) If CHIP STATE value is 'x' -> do nothing */
+				if( $CHIP_STATE[$parsed[0]] == 'x' )
+					continue;
+
+				/* (2) If state does not exist -> go to next chip */
+				if( !isset($parsed[2][$CHIP_STATE[$parsed[0]]]) )
+					continue;
+
+				/* (3) Use variables to be more human-readable */
+				$position = $parsed[0];
+				$state    = $CHIP_STATE[$parsed[0]];
+
+				/* (3) Set state */
+				$updated = syscall(SOURCE_DIR."/lib/global-state/set {$position} {$state}");
+
+				/* (4) If error */
+				if( $updated === false )
+					slog("Cannot set ${position} chip to state {$state}", 'global-state:update');
+
+			}
+		}
+		return 0;
+
+	}
+
+
+	/* [3] Launch main script
+	=========================================================*/
+	$exec = globalstate_update();
+
+	echo $exec;
+	die($exec);
+?>
+
diff --git a/lib/file/truncate b/lib/file/truncate
new file mode 100755
index 0000000..7dd4030
--- /dev/null
+++ b/lib/file/truncate
@@ -0,0 +1,41 @@
+#!/bin/bash
+
+__DIR__=$(dirname $(realpath $0));
+
+source $__DIR__/../../lib/include/bash/const;
+source $__DIR__/../../lib/include/bash/func;
+
+
+# [1] Check arguments
+#========================================================#
+
+# (1) If argument missing #
+if [ $# -lt 2 ]; then
+	echo 127;
+	exit 127;
+fi;
+
+# (2) Check argument #1 #
+if [ ! -e "$DATA_DIR/$1" ]; then
+	echo 127;
+	exit 127;
+fi;
+
+# (3) Check number of lines to truncate #
+if [ $2 -gt $(wc -l "$DATA_DIR/$1" | awk '{print $1}') ]; then
+	echo 127;
+	exit 127;
+fi;
+
+
+# [2] Truncate file
+#========================================================#
+# (1) Increment by 1 (because exlusive) #
+incr=$(expr $2 + 1);
+
+# (2) Truncate file #
+tail -n +$incr "$DATA_DIR/$1" | tee "$DATA_DIR/$1" > /dev/null;
+
+
+echo 0;
+exit 0;