Jetson_nano
Nvidia Jetson nano development board informations.
__________________________ SOMMAIRE _____________________________
- Start with Jetson nano board
- Install node RED
- Install influxdb
- Install grafana
- Install APACHE with PHP
START WITH JETSON BOARD
Power the board
For power the board there are two way :
- Power with micro usb connector with the power limitation 5V/2A. In this case you can't have a lot of peripheral because with 2A under 5V there are not enough power supply.
- Power with Barrel Jack 5V/4A. To use this power supply is important to connect the jumper J48.
Getting Started With Jetson Nano Developer Kit
There are 4 stages for start using the dev board :
- Power supply choice (micro usb or jack power). For jack power it's necessary to buy an external power supply (5V/4A)
- Download the ISO file and install it on an SD card.
- Setup the first boot with SD card, keyboard, mouse and ethernet connexions.
- Test Jetson nano environment.
Note : For my board version, the lastest file not work. The correct file is the jetson-nano-sd-r32.1-2019-03-18.zip.
Link ISO jetson nano r32.1-2019-03-18 : (https://nvidia.box.com/shared/static/dp7xma0f4jbvttha6xo14km14fztal7o.zip)
Enable and configure WIFI connexion
wifi package
Add the wifi package with wpa
sudo apt-get install wpasupplicant wireless-tools
wifi informations
For testing if wifi card is blocked
sudo rfkill list
For unblock all wifi board :
sudo rfkill unblock all
For obtain list of network in console mode :
iw dev
For list the visible wifi network on wlan0 interface
sudo iw dev wlan0 scan
For see the status of the wifi connexion
sudo iw dev wlan0 link
For statistic infirmations on the acces point :
iw dev wlan0 station dump
wifi configuration
Edit interface file as well:
sudo nano /etc/network/interfaces
Enter this part :
auto wlan0
iface wlan0 inet static
address 192.168.0.19
netmask 255.255.255.0
gateway 192.168.0.254
wpa-ssid "network-name"
wpa-psk "pre-shared-key"
Restart the network for testing
sudo /etc/init.d/networking restart
Link for information : https://linuxconfig.org/setup-wireless-interface-with-wpa-and-wpa2-on-ubuntu
Link for information : https://doc.ubuntu-fr.org/wifi
Enable desktop sharing of embedded UBUNTU
By default there are somes problems to enable desktop sharing.
To activate it, it nesessary to do this
- Edit the Xml file like : sudo nano /usr/share/glib-2.0/schemas/org.gnome.Vino.gschema.xml
- Add this part on the XML file :
<key name='enabled' type='b'>
<summary>Enable remote access to the desktop</summary>
<description>
If true, allows remote access to the desktop via the RFB
protocol. Users on remote machines may then connect to the
desktop using a VNC viewer.
</description>
<default>false</default>
</key>
- Compile the Gnome schema with : sudo glib-compile-schemas /usr/share/glib-2.0/schemas
- After this, you can enable desktop sharing.
Source information : http://bit.ly/2onnLIc
deactivate GUI on boot
To disable GUI on boot, run:
sudo systemctl set-default multi-user.target
To enable GUI again issue the command:
sudo systemctl set-default graphical.target
to start Gui session on a system without a current GUI just execute:
sudo systemctl start gdm3.service
Install jupyter lab
sudo apt install nodejs npm
sudo apt install python3-pip
sudo pip3 install jupyter jupyterlab
sudo jupyter labextension install @jupyter-widgets/jupyterlab-manager
sudo jupyter labextension install @jupyterlab/statusbar
jupyter lab --generate-config
sudo jupyter --build
jupyter notebook password
Source : https://github.com/NVIDIA-AI-IOT/jetbot/wiki/Create-SD-Card-Image-From-Scratch
Run jupyter lab
jupyter notebook --ip=0.0.0.0 //for running jupyter
link to start on Jetson Nano : http://192.168.55.1:8888/lab? or http://127.0.0.1:8888/lab?
Tensorflow on Jetson nano
Nvidia official TensorFlow release for Jetson Nano! (Python3.6+JetPack4.2.1)
$ sudo apt-get install libhdf5-serial-dev hdf5-tools libhdf5-dev zlib1g-dev zip libjpeg8-dev
$ sudo apt-get install python3-pip
$ sudo pip3 install -U pip
$ sudo pip3 install -U numpy grpcio absl-py py-cpuinfo psutil portpicker six mock requests gast h5py astor termcolor protobuf keras-applications keras-preprocessing wrapt google-pasta
$ sudo pip3 install --pre --extra-index-url https://developer.download.nvidia.com/compute/redist/jp/v42 tensorflow-gpu==1.14.0+nv19.7
DL frameworks - https://developer.nvidia.com/deep-learning-frameworks
Download - https://developer.qa.nvidia.com/embedded/downloads#?search=tensorflow
Installation guide - https://docs.nvidia.com/deeplearning/frameworks/install-tf-jetson-platform/index.html
Release note - https://docs.nvidia.com/deeplearning/dgx/install-tf-xavier-release-notes/index.html
JetCard
JetCard is a system configuration that makes it easy to get started with AI. It comes pre-loaded with
A Jupyter Lab server that starts on boot for easy web programming
A script to display the Jetson's IP address (and other stats)
The popular deep learning frameworks PyTorch and TensorFlow
After configuring your system using JetCard, you can get started prototyping AI projects from your web browser in Python.
See also
**JetBot** - An educational AI robot based on NVIDIA Jetson Nano
**JetRacer** - An educational AI racecar using NVIDIA Jetson Nano
**JetCam** - An easy to use Python camera interface for NVIDIA Jetson
**torch2trt** - An easy to use PyTorch to TensorRT converter
Poblem for open webcam
When you try to test your webcam on jupyterlab and you have this error :
RuntimeError Traceback (most recent call last)
/usr/local/lib/python3.6/dist-packages/jetcam-0.0.0-py3.6.egg/jetcam/usb_camera.py in __init__(self, *args, **kwargs)
23 if not re:
---> 24 raise RuntimeError('Could not read image from camera.')
25
RuntimeError: Could not read image from camera.
During handling of the above exception, another exception occurred:
RuntimeError Traceback (most recent call last)
<ipython-input-1-3869f3f89e04> in <module>
1 from jetcam.usb_camera import USBCamera
2
----> 3 camera = USBCamera(width=224, height=224, capture_width=640, capture_height=480, capture_device=1)
/usr/local/lib/python3.6/dist-packages/jetcam-0.0.0-py3.6.egg/jetcam/usb_camera.py in __init__(self, *args, **kwargs)
26 except:
27 raise RuntimeError(
---> 28 'Could not initialize camera. Please see error trace.')
29
30 atexit.register(self.cap.release)
RuntimeError: Could not initialize camera. Please see error trace.
Use this correction :
if your opencv is not installed with jetpack ,you should modified code
in the file usb_camera.py, line 20
#self.cap = cv2.VideoCapture(self._gst_str(), cv2.CAP_GSTREAMER)
self.cap = cv2.VideoCapture(self.capture_device)
then reinstall jetcam, camera should be OK
if the file is an *.egg file convert him into zip after extract the zip and modify the usb_camera.py
/usr/local/lib/python3.6/dist-packages/jetcam-0.0.0-py3.6.egg/jetcam/usb_camera.py
utils
Temperature sensor
To monitor temperature sensor
sudo apt install lm-sensor
after to know the temperature
sensors
tegrastats
NODE RED
intallation of NODE RED
To install NODE RED run these command :
sudo apt-get install nodered
Autostart on boot
If you want Node-RED to run when the Pi is turned on, or re-booted, you can enable the service to autostart by running the command:
sudo systemctl enable nodered.service
To disable the service, run the command:
sudo systemctl disable nodered.service
INFLUXDB
installation Influxdb
Package installation :
sudo apt install influxdb //for server
sudo apt install influxdb-client //for client for adding database
Or for manual installation, to install influxdb on Jetson you can go to the web site : https://portal.influxdata.com/downloads/
Run these command for ARM 64 bit
wget https://dl.influxdata.com/influxdb/releases/influxdb_2.0.0-alpha.18_linux_arm64.tar.gz
tar xvfz influxdb_2.0.0-alpha.18_linux_arm64.tar.gz
Get started with influxdb : https://v2.docs.influxdata.com/v2.0/get-started/
add data on the database
For adding new database run influxdb in command line as well
influx -port 8090
You can see some command for create a database
CREATE DATABASE base_name
SHOW DATABASES //to see database name
You can manage the retention pilicy with these commands :
CREATE RETENTION POLICY "one_year" ON base_name DURATION 365d REPLICATION 1 DEFAULT //for database retention
RETENTION POLICY "one_year" ON nom_base DURATION 365d REPLICATION 1 DEFAULT //for create retention policy Ex:1year=365days
ALTER RETENTION POLICY "one_year" ON "nom_base" DURATION 24h REPLICATION 1 //replace policy retention ex:1year->24h
DROP RETENTION POLICY "one_year" ON "nom_base" //delete retention policy
SHOW RETENTION POLICIES ON base_name
Special commands :
DROP DATABASE <database_name> //erase database
SHOW DATABASES //list all database
CREATE DATABASE "database_name" //create database
USE "database_name" /acitave the database for request
DROP MEASUREMENT <measurement_name> //erase all data on a database
- example : DROP MEASUREMENT "msg.measurement"
SHOW MEASUREMENTS //to see measurment
SHOW FIELD KEYS //list the data format
//delete data with time condition :
USE "database_name"
DELETE FROM "name" WHERE time < 1615282155000000000
installation Influxdb docker 1.x
command docker :
$ docker run -p 8086:8086 \
-v $PWD:/var/lib/influxdb \
influxdb:1.8
GRAFANA
Grafana installation
To install Grafana go to this link : https://grafana.com/grafana/download?platform=arm
run these command :
wget https://s3-us-west-2.amazonaws.com/grafana-releases/release/grafana_5.2.0-beta1_arm64.deb
sudo dpkg -i grafana_5.2.0-beta1_arm64.deb
installation grafana with docker
command pull docker :
docker pull grafana/grafana
command for launch grafana with docker :
docker run -d --name=grafana -p 3000:3000 grafana/grafana
INSTALL APACHE with php
Use this command to install apache
sudo apt install apache2
Use this command to install PHP
sudo apt install php php-mbstring
Use this command to install MySQL avec php
sudo apt install mysql-server php-mysql
Change the file property with this command on the directory /var/www/html
cd /var/www/html
sudo chown -Rf www-data:www-data .
sudo chmod -Rf 777 .
Run the web server with this command
sudo service apache2 start
For managing the mysql data base you can install the PhpMyAdmin tool with this command
//for install phpmyadmin
sudo apt install phpmyadmin
//validate all information and set a password for acces to the mysql
//for create a link to the phpmyadmin directory
sudo ln -s /usr/share/phpmyadmin /var/www/html/phpmyadmin
REPLACE SDCARD BY EXTERNAL USB DRIVE (USB3)
Use these commands for booting the jetson nano on USB external drive
Install
You should do this on a freshly flashed Micro SD card. You can use a 16GB card for this process. In the video, we use a Samsung T5 500 GB USB SSD. On the JetsonHacksNano account on Github, there is a repository named rootOnUSB. Clone the repository, and then switch to the repositories directory:
$ git clone https://github.com/JetsonHacksNano/rootOnUSB
$ cd rootOnUSB
This is a 4 step process.
Step 1
Build the initramfs with USB support, so that USB is available early in the boot process. A convenience script named addUSBToInitramfs.sh provides this functionality.
$ ./addUSBToInitramfs.sh
Step 2
Prepare a USB drive (preferably USB 3.0, SSD, HDD, or SATA->USB) by formatting the disk as ext4 with a partition. In the video, we use the ‘Disks’ application. It is easier if you only plug in one USB drive during this procedure. When finished, the disk should show as /dev/sda1 or similar. Note: Make sure that the partition is ext4, as NTSF will appear to copy correctly but cause issues later on. Typically it is easiest to set the volume label for later use during this process.
Step 3
Copy the application area of the micro SD card to the USB drive. copyRootToUSB.sh copies the contents of the entire system micro SD card to the USB drive. Naturally, the USB drive storage should be larger than the micro SD card. Note: Make sure that the USB drive is mounted before running the script. In order to copyRootToUSB:
usage: ./copyRootToUSB.sh [OPTIONS]
-d | --directory Directory path to parent of kernel
-v | --volume_label Label of Volume to lookup
-p | --path Device Path to USB drive (e.g. /dev/sda1)
-h | --help This message
In the video, we:
$ ./copyRootToUSB.sh -p /dev/sda1
Remember to mount the USB drive before attempting to copy.
Step 4
Modify the /boot/extlinux/extlinux.conf file. An entry should be added to point to the new rootfs (typically this is /dev/sda1). There is a sample configuration file: sample-extlinux.conf
You should make a backup of the original extlinux.conf file. Also, when you edit the file you should make a backup of the original configuration and relabel the backup. This will allow you to access an alternate boot method from the serial console in case something goes sideways.
Then you should changed the INITRD line to:
INITRD /boot/initrd-xusb.img
So that the system uses the initramfs that we built that includes the USB firmware. Then set the root to the USB drive.
Here are some examples. You can set the drive by the UUID of the disk drive, the volume label of the drive, or the device path:
APPEND
The first entry is most specific, the last most generic. Note that you are not guaranteed that a USB device is enumerated in a certain order and will always have the same device path. That is, if you leave another USB drive plugged in along with your root disk when you boot the Jetson, the root disk may have a different path than originally, such as /dev/sdb1.
Also, there is a convenience file: diskUUID.sh which will determine the UUID of a given device. This is useful for example to determine the UUID of the USB drive. Note: If the UUID returned is not similar in length to the above example, then it is likely that the device is not formatted as ext4.
$ ./diskUUID.sh
While this defaults to sda1 (/dev/sda1), you can also determine other drive UUIDs. The /dev/ is assumed, use the -d flag. For example:
$ ./diskUUID.sh -d sdb1
You may find this information useful for setting up the extlinux.conf file Reboot and Enjoy!
Source : https://www.jetsonhacks.com/2019/09/17/jetson-nano-run-from-usb-drive/
ADD BLUETOOTH AUDIO PROFILE
I summarized the key words here.
sudo apt update
sudo apt install pulseaudio pulseaudio-utils pavucontrol pulseaudio-module-bluetooth
and then modify the bluetooth service
sudo nano /etc/systemd/system/bluetooth.target.wants/bluetooth.service
ExecStart=/usr/lib/bluetooth/bluetoothd -d --noplugin=audio,a2dp,avrcp
into
ExecStart=/usr/lib/bluetooth/bluetoothd -d --noplugin=audio,avrcp
and reboot
sudo reboot
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