diff --git a/README.md b/README.md
index a5501cb..ba7f231 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 This repository holds utilities for working with NVIDIA Jetson Development Kit
 
 # jetsonInfo
-Get information about the NVIDIA Jetson OS environment on NVIDIA Jetson Development Kits (TK1, TX1, TX2, AGX Xavier)
+Get information about the NVIDIA Jetson OS environment on NVIDIA Jetson Development Kits (TK1, TX1, TX2, AGX Xavier, Jetson Nano)
 
 The information about the NVIDIA Jetson Development Kit operating system is spread over a few files. This is a handy tool to use for reference.
 
@@ -23,6 +23,11 @@ The Ubuntu version is derived from the file: '/etc/os-release'
 The Linux kernel version is derived from the file: '/proc/version'
 
 Release Notes:
+
+January, 2020
+* v2.0
+* Add support for JetPack 4.3
+
 November, 2018
 * v1.1.2
 * Add support for JetPack 4.1.1 (L4T 31.1.0)
@@ -43,7 +48,7 @@ July, 2018
 
 The shell script jetson_variables is derived from jetson_easy: https://github.com/rbonghi/jetson_easy
 
-Copyright (c) 2015-2018 Raffaello Bonghi
+Copyright (c) 2015-2020 Raffaello Bonghi
 
 See license for jetson_easy in scripts folder
 
diff --git a/jetsonInfo.py b/jetsonInfo.py
index d288381..1ba57b0 100755
--- a/jetsonInfo.py
+++ b/jetsonInfo.py
@@ -30,28 +30,7 @@ class terminalColors:
 print(" NVIDIA Jetson " + os.environ["JETSON_BOARD"].strip())
 
 #L4T Version
-if os.path.exists('/etc/nv_tegra_release'):
-    with open('/etc/nv_tegra_release','r') as l4tVersionFile:
-        l4tVersionFileText=l4tVersionFile.read()
-    textLines=l4tVersionFileText.splitlines() 
-    l4tVersionInfo=textLines[0].split(',')
-    for entry in l4tVersionInfo:
-        if 'release' in entry: 
-            # Example: '# R24 (release)'
-            l4tRelease=entry.split(' ')[1]
-            l4tRelease=filter(str.isdigit,l4tRelease)
-        elif 'REVISION' in entry:
-            # Example: 'REVISION: 2.1'
-            l4tRevision=entry.split(' ')[2]
-        elif 'BOARD' in entry:
-            # Example: 'BOARD: t210ref'
-            board=entry.split(' ')[2]
-    print(' L4T ' + l4tRelease + '.' + l4tRevision + ' [ JetPack ' +os.environ['JETSON_JETPACK'].strip()+' ]')
-    print(' Board: ' + board)
-else:
-    print(terminalColors.FAIL + 'Error: Unable to find L4T Version'  + terminalColors.ENDC)
-    print('Reason: Unable to find file /etc/nv_tegra_release')
-
+print(' L4T ' + os.environ['JETSON_L4T'].strip() + ' [ JetPack ' +os.environ['JETSON_JETPACK'].strip()+' ]')
 # Ubuntu version
 if os.path.exists('/etc/os-release'):
     with open('/etc/os-release', 'r') as ubuntuVersionFile:
diff --git a/scripts/jetson_variables b/scripts/jetson_variables
index 7940bee..e6e62d8 100755
--- a/scripts/jetson_variables
+++ b/scripts/jetson_variables
@@ -1,32 +1,20 @@
 #!/bin/bash
-# Copyright (C) 2018, Raffaello Bonghi <raffaello@rnext.it>
-# Portions (c) 2018, JetsonHacks
-# All rights reserved
+# This file is part of the jetson_stats package (https://github.com/rbonghi/jetson_stats or http://rnext.it).
+# Copyright (c) 2019 Raffaello Bonghi.
 #
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
 #
-# 1. Redistributions of source code must retain the above copyright 
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. Neither the name of the copyright holder nor the names of its 
-#    contributors may be used to endorse or promote products derived 
-#    from this software without specific prior written permission.
-# 
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
-# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, 
-# BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
-# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
-# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
-# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
-# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
-# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
 
 # NVIDIA Identify version 
 # reference: 
@@ -41,129 +29,205 @@ if [ -f /sys/module/tegra_fuse/parameters/tegra_chip_id ]; then
             JETSON_BOARD="TX1" ;;
         24)
             JETSON_BOARD="TX2" ;;
-        25) 
-            JETSON_BOARD="AGX Xavier" ;;
+        25)
+            JETSON_BOARD="Xavier" ;;
         *)
             JETSON_BOARD="UNKNOWN" ;;
     esac
-    JETSON_DESCRIPTION="NVIDIA Jetson $JETSON_BOARD"
+    if [ "$JETSON_BOARD" = "Xavier" ] ; then
+        JETSON_TYPE="AGX Xavier"
+    elif [ "$JETSON_BOARD" = "TX1" ] ; then
+        JETSON_TYPE="NANO/TX1"
+    else
+        JETSON_TYPE="$JETSON_BOARD"
+    fi
+    # Make Jetson Description
+    JETSON_DESCRIPTION="NVIDIA Jetson $JETSON_TYPE"
+else
+    JETSON_BOARD="NO-BOARD"
+    JETSON_TYPE="PC"
+    JETSON_DESCRIPTION="PC computer"
 fi
+# Export variables
 export JETSON_BOARD
+export JETSON_TYPE
+export JETSON_DESCRIPTION
 
 # NVIDIA Jetson version
 # reference https://devtalk.nvidia.com/default/topic/860092/jetson-tk1/how-do-i-know-what-version-of-l4t-my-jetson-tk1-is-running-/
+# https://stackoverflow.com/questions/16817646/extract-version-number-from-a-string
+# https://askubuntu.com/questions/319307/reliably-check-if-a-package-is-installed-or-not
+# https://github.com/dusty-nv/jetson-inference/blob/7e81381a96c1ac5f57f1728afbfdec7f1bfeffc2/tools/install-pytorch.sh#L296
 if [ -f /etc/nv_tegra_release ]; then
     # L4T string
+    # First line on /etc/nv_tegra_release 
+    # - "# R28 (release), REVISION: 2.1, GCID: 11272647, BOARD: t186ref, EABI: aarch64, DATE: Thu May 17 07:29:06 UTC 2018"
     JETSON_L4T_STRING=$(head -n 1 /etc/nv_tegra_release)
-
     # Load release and revision
-    JETSON_L4T_RELEASE=$(echo $JETSON_L4T_STRING | cut -f 1 -d ',' | sed 's/\# R//g' | cut -d ' ' -f1)
-    JETSON_L4T_REVISION=$(echo $JETSON_L4T_STRING | cut -f 2 -d ',' | sed 's/\ REVISION: //g' )
-    # unset variable
-    unset JETSON_L4T_STRING
-    
-    # Write Jetson description
-    JETSON_L4T="$JETSON_L4T_RELEASE.$JETSON_L4T_REVISION"
-
-    # Write version of jetpack installed
-    # https://developer.nvidia.com/embedded/jetpack-archive
-    if [ "$JETSON_BOARD" = "AGX Xavier" ] ; then 
-        case $JETSON_L4T in
-            "31.0.1")
-                    JETSON_JETPACK="4.0 DP" ;;
-            "31.0.2")
-                    JETSON_JETPACK="4.1 DP" ;;
-            "31.1.0")
-                    JETSON_JETPACK="4.1.1 DP" ;;
-            *)
-               JETSON_JETPACK="UNKNOWN" ;;
-        esac        
-    elif [ "$JETSON_BOARD" = "TX2i" ] ; then 
-        case $JETSON_L4T in
-            "28.2.1")
-                    JETSON_JETPACK="3.3 or 3.2.1" ;;
-            "28.2") 
-               JETSON_JETPACK="3.2" ;;
-            *)
-               JETSON_JETPACK="UNKNOWN" ;;
-        esac        
-    elif [ "$JETSON_BOARD" = "TX2" ] ; then
-        case $JETSON_L4T in
-            "28.2.1")
-                    JETSON_JETPACK="3.3 or 3.2.1" ;;
-            "28.2") 
-                    JETSON_JETPACK="3.2" ;;
-            "28.1") 
-                    JETSON_JETPACK="3.1" ;;
-            "27.1") 
-                    JETSON_JETPACK="3.0" ;;
-            *)
-               JETSON_JETPACK="UNKNOWN" ;;
-        esac
-    elif [ "$JETSON_BOARD" = "TX1" ] ; then
-        case $JETSON_L4T in
-            "28.2.0")
-                    JETSON_JETPACK="3.3" ;;
-            "28.2") 
-                    JETSON_JETPACK="3.2 or 3.2.1" ;;
-            "28.1") 
-                    JETSON_JETPACK="3.1" ;;
-            "24.2.1") 
-                    JETSON_JETPACK="3.0 or 2.3.1" ;;
-            "24.2") 
-                    JETSON_JETPACK="2.3" ;;
-            "24.1") 
-                    JETSON_JETPACK="2.2.1 or 2.2" ;;
-            "23.2") 
-                    JETSON_JETPACK="2.1" ;;
-            "23.1") 
-                    JETSON_JETPACK="2.0" ;;
-            *)
-               JETSON_JETPACK="UNKNOWN" ;;
-        esac
-    elif [ "$JETSON_BOARD" ="TK1" ] ; then
-        case $JETSON_L4T in
-            "21.5") 
-                    JETSON_JETPACK="2.3.1 or 2.3" ;;
-            "21.4") 
-                    JETSON_JETPACK="2.2 or 2.1 or 2.0 or DP 1.2" ;;
-            "21.3") 
-                    JETSON_JETPACK="DP 1.1" ;;
-            "21.2") 
-                    JETSON_JETPACK="DP 1.0" ;;
-            *)
-               JETSON_JETPACK="UNKNOWN" ;;
-        esac
-    else
-        # Unknown board
-        JETSON_JETPACK="UNKNOWN"
-    fi
+    JETSON_L4T_RELEASE=$(echo $JETSON_L4T_STRING | cut -f 2 -d ' ' | grep -Po '(?<=R)[^;]+')
+    JETSON_L4T_REVISION=$(echo $JETSON_L4T_STRING | cut -f 2 -d ',' | grep -Po '(?<=REVISION: )[^;]+')
+elif dpkg --get-selections | grep -q "^nvidia-l4t-core[[:space:]]*install$"; then
+    # Read version
+	JETSON_L4T_STRING=$(dpkg-query --showformat='${Version}' --show nvidia-l4t-core)
+	# extract version
+	JETSON_L4T_ARRAY=$(echo $JETSON_L4T_STRING | cut -f 1 -d '-')
+    # Load release and revision
+	JETSON_L4T_RELEASE=$(echo $JETSON_L4T_ARRAY | cut -f 1 -d '.')
+	JETSON_L4T_REVISION=${JETSON_L4T_ARRAY#"$JETSON_L4T_RELEASE."}
+else
+    # Load release and revision
+    JETSON_L4T_RELEASE="N"
+    JETSON_L4T_REVISION="N.N"
 fi
+# Write Jetson description
+JETSON_L4T="$JETSON_L4T_RELEASE.$JETSON_L4T_REVISION"
+# Export Release L4T
+export JETSON_L4T_RELEASE
+export JETSON_L4T_REVISION
+export JETSON_L4T
+
+# Write version of jetpack installed
+# https://developer.nvidia.com/embedded/jetpack-archive
+case $JETSON_L4T in
+    "32.3.1") JETSON_JETPACK="4.3" ;;    
+    "32.2.1") JETSON_JETPACK="4.2.2" ;;
+    "32.2.0" | "32.2") JETSON_JETPACK="4.2.1" ;;
+    "32.1.0" | "32.1") JETSON_JETPACK="4.2" ;;
+    "31.1.0" | "31.1") JETSON_JETPACK="4.1.1" ;;
+    "31.0.2") JETSON_JETPACK="4.1" ;;
+    "31.0.1") JETSON_JETPACK="4.0" ;;
+    "28.2.1") JETSON_JETPACK="3.3 | 3.2.1" ;;
+    "28.2.0" | "28.2") JETSON_JETPACK="3.2" ;;
+    "28.1.0" | "28.1") JETSON_JETPACK="3.1" ;;
+    "27.1.0" | "27.1") JETSON_JETPACK="3.0" ;;
+    "24.2.1") JETSON_JETPACK="3.0 | 2.3.1" ;;
+    "24.2.0" | "24.2") JETSON_JETPACK="2.3" ;;
+    "24.1.0" | "24.1") JETSON_JETPACK="2.2.1 | 2.2" ;;
+    "23.2.0" | "23.2") JETSON_JETPACK="2.1" ;;
+    "23.1.0" | "23.1") JETSON_JETPACK="2.0" ;;
+    "21.5.0" | "21.5") JETSON_JETPACK="2.3.1 | 2.3" ;;
+    "21.4.0" | "21.4") JETSON_JETPACK="2.2 | 2.1 | 2.0 | DP 1.2" ;;
+    "21.3.0" | "21.3") JETSON_JETPACK="DP 1.1" ;;
+    "21.2.0" | "21.2") JETSON_JETPACK="DP 1.0" ;;
+    *) JETSON_JETPACK="UNKNOWN" ;;
+esac
+# Export Jetson Jetpack installed
+export JETSON_JETPACK
 
 # Read CUDA version
 if [ -f /usr/local/cuda/version.txt ]; then
     JETSON_CUDA=$(cat /usr/local/cuda/version.txt | sed 's/\CUDA Version //g')
 else
-    JETSON_CUDA="NOT INSTALLED"
+    JETSON_CUDA="NOT_INSTALLED"
 fi
+# Jetson CUDA version
+export JETSON_CUDA
 
-# Read opencv version
-pkg-config --exists opencv
-if [ $? == "0" ] ; then
-    JETSON_OPENCV=$(pkg-config --modversion opencv)
+# Read from OpenCV if is installed CUDA
+opencv_read_cuda()
+{
+    # Red if use CUDA or not
+    OPENCV_VERSION_VERBOSE=$(opencv_version --verbose | grep "Use Cuda" )
+
+    if [ ! -z "$OPENCV_VERSION_VERBOSE" ]; then
+        # Read status of CUDA
+        OPENCV_CUDA_FLAG=$(echo $OPENCV_VERSION_VERBOSE | cut -f2 -d ':' | cut -f2 -d ' ' )
+        
+        if [ $OPENCV_CUDA_FLAG=="NO" ] ; then
+            # Set NO if cuda is not installed
+	    echo "NO"
+        else
+            # Set YES if cuda is installed
+	    echo "YES"
+        fi
+        # Remove variable
+        unset OPENCV_CUDA_FLAG
+    else
+        # read NVIDIA CUDA version
+        OPENCV_VERSION_VERBOSE=$(opencv_version --verbose | grep "NVIDIA CUDA" )
+        # get information
+        OPENCV_CUDA_FLAG=$(echo $OPENCV_VERSION_VERBOSE | cut -f2 -d ':')
+        OPENCV_CUDA_FLAG=${OPENCV_CUDA_FLAG//[[:blank:]]/}
+	# Remove variable
+        unset OPENCV_CUDA_FLAG
+        # Set YES if cuda is installed
+	echo "YES"
+    fi
+    # Remove variable
+    unset OPENCV_VERSION_VERBOSE
+    return
+}
+
+if hash opencv_version 2>/dev/null; then
+    JETSON_OPENCV="$(opencv_version)"
+    # Read information about cuda status
+    JETSON_OPENCV_CUDA=$(opencv_read_cuda)
 else
-    JETSON_OPENCV="NOT INSTALLED"
+    JETSON_OPENCV="NOT_INSTALLED"
+    JETSON_OPENCV_CUDA="NO"
 fi
+# Opencv variables
+export JETSON_OPENCV
+export JETSON_OPENCV_CUDA
 
-export JETSON_BOARD
-export JETSON_CUDA
-export JETSON_JETPACK
-export JETSON_L4T
+# Write CUDA architecture
+# https://developer.nvidia.com/cuda-gpus
+# https://devtalk.nvidia.com/default/topic/988317/jetson-tx1/what-should-be-the-value-of-cuda_arch_bin/
+case $JETSON_BOARD in
+    "Xavier") 
+        JETSON_CUDA_ARCH_BIN="7.2" ;;
+    "TX2" | "TX2i") 
+        JETSON_CUDA_ARCH_BIN="6.2" ;;
+    "TX1")
+        JETSON_CUDA_ARCH_BIN="5.3" ;;
+    "TK1")
+        JETSON_CUDA_ARCH_BIN="3.2" ;;
+    * )
+        JETSON_CUDA_ARCH_BIN="NONE" ;;
+esac
+# Export Jetson CUDA ARCHITECTURE
+export JETSON_CUDA_ARCH_BIN
+
+# Extract cuDNN version
+JETSON_CUDNN=$(dpkg -l 2>/dev/null | grep -m1 "libcudnn")
+if [ ! -z "$JETSON_CUDNN" ] ; then
+    JETSON_CUDNN=$(echo $JETSON_CUDNN | sed 's/.*libcudnn[0-9] \([^ ]*\).*/\1/' )
+else
+    JETSON_CUDNN="NOT_INSTALLED"
+fi
+# Export NVIDIA CuDNN Library
+export JETSON_CUDNN
+
+# Extract TensorRT version
+JETSON_TENSORRT=$(dpkg -l 2>/dev/null | grep -m1 " tensorrt ")
+if [ ! -z "$JETSON_TENSORRT" ] ; then
+    JETSON_TENSORRT=$(echo $JETSON_TENSORRT | sed 's/.*tensorrt \([^ ]*\).*/\1/' )
+else
+    JETSON_TENSORRT="NOT_INSTALLED"
+fi
+# Export NVIDIA CuDNN TensorRT
+export JETSON_TENSORRT
+
+# Extract Visionworks version
+JETSON_VISIONWORKS=$(dpkg -l 2>/dev/null | grep -m1 "libvisionworks")
+if [ ! -z "$JETSON_VISIONWORKS" ] ; then
+    JETSON_VISIONWORKS=$(echo $JETSON_VISIONWORKS | sed 's/.*libvisionworks \([^ ]*\).*/\1/' )
+else
+    JETSON_VISIONWORKS="NOT_INSTALLED"
+fi
+# Export NVIDIA CuDNN VisionWorks
+export JETSON_VISIONWORKS
+
+# Serial number
+# https://devtalk.nvidia.com/default/topic/1055507/jetson-nano/nano-serial-number-/
+if [ -f /sys/firmware/devicetree/base/serial-number ]; then
+    JETSON_SERIAL_NUMBER=$(tr -d '\0' </sys/firmware/devicetree/base/serial-number)
+else
+    JETSON_SERIAL_NUMBER="UNKNOWN"
+fi
+# Export NVIDIA Serial Number
+export JETSON_SERIAL_NUMBER
 
 # TODO Add enviroments variables:
 # - UID -> https://devtalk.nvidia.com/default/topic/996988/jetson-tk1/chip-uid/post/5100481/#5100481
 # - GCID, BOARD, EABI
-# - cuDNN
-# - TensorRT
-# - Visionworks
-