Cómo instalar Node-RED en Rapberry Pi OS

Install Node-RED on Raspberry Pi OS

Node RED's Official Web Page:

• https://nodered.org/

Docs:

• https://nodered.org/docs/user-guide/

• Running on Raspberry Pi : Node-RED (nodered.org) 

Crea tu primer flow -- Create your first flow:

• https://nodered.org/docs/tutorials/first-flow

Como asegurarlo -- How to secure Node-RED:

• https://nodered.org/docs/user-guide/runtime/securing-node-red

Agregando nodos -- Adding nodes:

• https://nodered.org/docs/user-guide/runtime/adding-nodes

Abrimos la Terminal (Ctrl+Alt+T) y escribimos--Open Terminal and type:

• sudo apt install -y build-essential git curl

• bash <(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered)

Respondemos con Y a todas las consultas que nos realice.Una vez ejecutado al finalizar veremos lo siguiente--Answer Y to all Questions, Once finished you see:

Al finalizar nos consultara si queremos personalizar la configuración, At the end ask for customize settings:

• Settings file.

• User security.

• Projects.

• Editor settings(theme, text editor)

• Node settings

Running locally

As with running Node-RED locally, you can use the node-red command to run Node-RED in a terminal. It can then be stopped by pressing Ctrl-C or by closing the terminal window.

Due to the limited memory of the Raspberry Pi, you will need to start Node-RED with an additional argument to tell the underlying Node.js process to free up unused memory sooner than it would otherwise.

To do this, you should use the alternative node-red-pi command and pass in the max-old-space-size argument.

• node-red-pi --max-old-space-size=256

Como podemos observar, nos indica el comando para iniciarlo--And the message for start it:

• node-red-start

O podemos hacer clic en el icono de la barra de tareas, así como también buscarlo en--Or Start from menu: Raspberry -> Programming-> Node-Red

Una vez iniciado minimizamos la ventana de consola--Minimize the window:

Y procedemos a abrir la interfaz que se encuentra en el navegador o en cualquier navegador que este en nuestra red local de cualquier dispositivo(Raspberry Pi, PC, Smartphone, tablet, Smart TV), introduciendo la IP y el puerto 1880--We can see Node-red on the browser with the IP and Port 1880:

• IP:1880

• 192.168.0.25:1880

Si no sabemos nuestra IP, basta con abrir una Terminal Ctrl+Alt+T y escribir--We can know our IP with:

• hostname -I

Running as a service

The install script for the Pi also sets it up to run as a service. This means it can run in the background and be enabled to automatically start on boot.

The following commands are provided to work with the service:

• node-red-start - this starts the Node-RED service and displays its log output. Pressing Ctrl-C or closing the window does not stop the service; it keeps running in the background

• node-red-stop - this stops the Node-RED service

• node-red-restart - this stops and restarts the Node-RED service

• node-red-log - this displays the log output of the service

You can also start the Node-RED service on the Raspberry Pi OS Desktop by selecting the Menu --> Programming --> Node-RED menu option.

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