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

Worked like a charm.

Givi

Hi.
Thanks for the info.
I’ll update the tutorial soon.
Regards,
Sara

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

Also before type node-red URL in browser, it needs to start node-red from RPI using following command.
node-red-start

Hi John, thank you, your answer was a great help to me. It looks like, that Node-RED is a good “dashboard” for looking at status and controlling IoT devices.
But I am looking for something different: I want to write a program (for example C++) that broadcasts messages to all connected devices. If I understand correctly I can write a program that talks to a broker, and the broker sends messages to the clients. I think that using the Rest API from a broker like Mosqitto could work.
This looks a little bit oversized to me, all I want is a simple way to broadcast messages from one client in a network to all others and to receive answers from them.

In order to control the flow of messages you need a broker. The esp XXX can receive and send messages, the broker distributes them. Mosquitto MQTT broker seems to be the favorite. Everything I’ve read says that the ESP family of controllers don’t have the power to “broker” the messages. Node Red is a great interface to connect messages to their destination in whatever fashion you desire. For example rather than simply a 1 or 0 (binary), or a number, or even text, you can create web pages that load on your cell phone or other mobile (or fixed) device. I currently have 5 esp8266 modules around monitoring temperature& humidity in various places, one monitoring heating oil level in a tank, and lock status in various locations. I plan more, the beauty of it all is the broker running on a pi or equivilant is the central reporting point and “flows” can be easily added to it. I’m currently using a Raspberry Pi 2b, and and have several other versions lying around I want to try. I’ve been told that the Rpi zero will work, and the zero 1 and 2 W have wifi built in; a great advantage if you want to go wireless. Hope that helps.

In the latest distro (buster) dubbed “Raspberry Pi OS, Node Red is not part of the image, it has to be installed. I am a novice with the Pi, and found it a bit frustrating to try to put it on a Raspberry Pi 0 W. After ignoring many warnings and error reports, it seemed to run, but much too slow to functional. I wanted to use the Pi 0 W in my project due to it’s size and built-in wifi but that may not be feasible. In the meantime I’ll try learning about Node Red and the next phase “Dashboard” using a Laptop with Ubuntu with Node Red and Dashboard installed on it.
Thank you Rui and Sara for all your work!

Hi Leonardo.
Our MQTT tutorials use Raspberry Pi, Node-RED, and Mosquitto.
We don’t have tutorials with OpenHAB or Home Assistant.
Regards,
Sara 🙂