Raspberry pie 4B Getting Started Guide

Raspberry pie 4B Hands on Guide

The software package and image can be obtained from Baidu online disk ：

link ：https://pan.baidu.com/s/1ReffurBHQWKU9cPnZFdOpw
Extraction code ：2021
– From Baidu network disk super member V4 The share of

First make sure we have the following ：

1. Raspberry pie board , My is 4B edition

2. One SD card

3. A card reader

4. Raspberry pie power cord

5. A wire line

One . Burn image

First install the following burning tools 【2. development environment \ Image burning tool \ Image burning tool balena-etcher】：

Installation process skipped .

After installation, open the software as follows ：

Click on select image, Choose our image 【2. development environment \ System image 】.

Note that img Suffix .

Then click on “select target”, Choose our hard drive , Here is the one who chose us SD card , Be careful not to make the wrong choice .

next , Start burning .

This process takes a long time , You can make a cappuccino first .

Verification is required after burning ：

End of validation ：

After that, pull out the card reader , Re insert , You can see that ：

Two . To configure WIFI

Here I use the mobile phone to turn on the hotspot , In fact, you can also connect your own router .

I first opened a hot spot with my mobile phone , Hot spot name ：aiden password ：123456789

It should be noted that the name and password should not be in Chinese .

Then open it with Notepad or other software 【11. Boot profile 】 Under the

Modified as ：

country=CN
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
    
	ssid="aiden"
	psk="123456789"
	priority=5
}

Remember to save... After modification .

Then copy the above two configuration files to boot pan ：

After the copy is completed, you can boot Disk eject . And then take it out SD card , Put it on the raspberry pie . Then plug the power cord into the raspberry pie , Turn it on , The raspberry pie will automatically connect to our hot spot after you turn it on . Then the computer is connected to our hotspot . So we can see on the mobile phone ：

The one above is raspberry pie , Here is my computer .

3、 ... and .SSH Sign in

open ssh Tools 【9. Supporting auxiliary software 】：

Configure the following ：

IP The address is what we saw on the mobile phone , The port number is selected by default 22,ssh.

choice open after , The following screen will appear ：

Choose... Directly here “ yes ” that will do .

Then enter the user name ：pi password :raspberry

Note that we can't see it when entering the password , This is a Linux A protection mechanism under , We can input the content one by one . After entering the user name and password, the following interface appears ：

It indicates that the connection is successful at this time .

Four . Turn on VNC service

Based on the previous window , We type... In the terminal ：

There will be ：

Use the up and down keys of the keyboard to move the cursor to select “5 Interfacing Options”, And return ;

And then choose P3.

choice “ yes ”

Finally, don't forget ：

So it turns on VNC service .

And then install it on your computer VNC Software ：

Installation process skipped .

After installation, open the software and enter ip Address ：

choice

Enter your username and password . user name ：pi password :raspberry

And then choose ok You can enter the table of our raspberry pie .

5、 ... and . Connect the raspberry pie to the computer using a cable

First of all, we need to , Access terminal , lookup ip Address .（ Just now, it was a hot spot where raspberry pie and computer were connected to mobile phones at the same time ）

Input in the terminal ：

Then you'll see ：

choice eth0 Corresponding inet Address . Let's record this address .

next , We quit VNC, Enter the address we just mentioned ：

Just follow the previous steps .（ But you must have connected the computer to the raspberry pie with an Internet cable , The computer can be connected to other computers first wifi）

After following the above steps , We can connect other hot spots in raspberry pie .

6、 ... and . install opencv-python

Because our system is actually pre installed , So there are already python Environmental Science , We can open the terminal of raspberry pie to check the version ：

What we use later is python3.

Here you can change the image source first . Refer to this article ：https://zhuanlan.zhihu.com/p/98079246

Then execute the following instructions in the terminal in turn ：（ Be sure to change the source before these operations , Otherwise it will be very slow ）

sudo apt-get update 
pip3 install numpy  （ If you already have it, you can upgrade it  pip3 install -U numpy）
pip3 install opencv-python

Test whether it can be used after installation ：

If no error is reported, the import is successful .

7、 ... and . install TensorFlow2

Here I mainly refer to this article ：https://zhuanlan.zhihu.com/p/158745478

1. Check whether the environment is installed successfully

python3 --version
pip3 --version
virtualenv --version

If a command is not found when it runs , Is not installed , Need to be in the 2 Step, select the corresponding command to install .

2. Installing modules that are not installed

According to the first 1 Step , Select from the following commands as needed , among update And installation libatlas-base-dev The command must be selected .

sudo apt update  #  This command is required 
sudo apt install python3-dev python3-pip  #  If already installed Python3 and pip3 Then skip this command 
sudo apt install libatlas-base-dev  #  This command is required , Be careful ！！！
sudo pip3 install -U virtualenv  #  If the virtual environment is already installed , Skip this command 

3. Creating a virtual environment .

virtualenv --system-site-packages -p python3 ./venv

4. Activate the virtual environment

source ./venv/bin/activate

After executing the above statements, you enter the virtual environment .

5. to update pip

pip3 install --upgrade pip

6. Install dependency packages

pip3 install keras_applications==1.0.8 --no-deps
pip3 install keras_preprocessing==1.1.0 --no-deps
pip3 install h5py==2.9.0
pip3 install -U six wheel mock

7. download tensorflow package

Here I offer a TensorFlow2.3.0 My bag . In the link shared by Baidu online disk at the beginning .

Use vnc The file transfer tool of will transfer the package .

Then enter the path where the package is placed to install .

pip3 install tensorflow-2.3.0-cp37-none-linux_armv7l.whl

Some other dependent packages will be automatically downloaded during the download process , At this point, wait for the installation to complete .

Enter... After installation python Whether the environment test can be imported successfully ：

Reference resources ：

1.https://blog.csdn.net/u014397533/article/details/50910531

2.https://zhuanlan.zhihu.com/p/158745478