With the development of Internet of Things technology, Raspberry Pi, as a cheap microcomputer, has attracted more and more attention and application. Installing and configuring Node.js on the Raspberry Pi allows us to better utilize its functions for various developments and applications. This article will introduce how to install and configure Node.js on Raspberry Pi.

1. Preparation work

Before installing and configuring Node.js, you need to prepare the following work.

1. Prepare a usable Raspberry Pi

2. Have basic experience in operating Linux commands, such as using SSH to connect to the Raspberry Pi on the terminal

3. Prepare the SD card and insert it into your computer

4. Download the image file of the Raspbian operating system and write it to the SD card to use it as the operating system of the Raspberry Pi

2. Install Node.js

1. Open the terminal and execute the following command to update the software source and system package:

sudo apt-get update
sudo apt- get upgrade

2. Next, install Node.js through the following command:

sudo apt-get install nodejs

3. After installing Node.js, we need Install npm (Node.js package manager). Just execute the following command:

sudo apt-get install npm

4. Check whether Node.js and npm are installed successfully. Execute the following command:

node -v
npm -v

If the installation is successful, the Node.js and npm version numbers will be displayed on the terminal.

3. Configure Node.js environment

1. Change the default global installation directory of npm. Execute the following command:

mkdir ~/.npm-global
npm config set prefix '~/.npm-global'

After configuring this, we can use it globally on the terminal npm command, and the npm package will be installed in the ~/.npm-global directory.

2. Configure system environment variables. Open the bashrc file and execute the following command:

nano ~/.bashrc

3. Add the following content at the end of the file:

set PATH so it includes user's local npm bin if it exists

if [ -d "$HOME/.npm-global/bin" ] ; then

PATH="$HOME/.npm-global/bin:$PATH"

fi

Then press ctrl o to save the file, Press ctrl x to exit the file editor.

4. Make the updated environment variables take effect. Execute the following command:

source ~/.bashrc

At this point, the installation and configuration of Node.js on the Raspberry Pi has been completed.

4. Test Node.js

Enter the following command in the terminal:

node

If the symbol ">" appears, please indicate Node.js has run successfully. Next, we can enter the following code to test whether Node.js can be executed successfully:

console.log("Hello World");

If "Hello World" is output on the terminal, It means that Node.js can run successfully. At this point, we have completed the installation and configuration of Node.js on the Raspberry Pi, and successfully tested its operation.

Summary

This article introduces the simple steps to install and configure Node.js on Raspberry Pi. Although the installation and configuration of Node.js on the Raspberry Pi is relatively easy, when developing with Node.js, we still need to focus on the hardware resources and performance of the Raspberry Pi. In practice, we can control external hardware devices through the GPIO interface of the Raspberry Pi and write applications through Node.js to implement various functions.

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