Node-RED: Rozdiel medzi revíziami
Z SensorWiki
| Riadok 1: | Riadok 1: | ||
| − | == Quick Start == | + | == '''Quick Start''' == |
# Inštalácia: https://nodered.org/docs/getting-started/windows | # Inštalácia: https://nodered.org/docs/getting-started/windows | ||
| Riadok 13: | Riadok 13: | ||
# Koniec: Ctrl+C | # Koniec: Ctrl+C | ||
| − | + | '''Čo ďalej? Podrobnejšie informácie:''' | |
* Node-RED Guide: http://noderedguide.com | * Node-RED Guide: http://noderedguide.com | ||
* Toto je dolezite pochopit https://nodered.org/docs/user-guide/messages#understanding-the-structure-of-a-message | * Toto je dolezite pochopit https://nodered.org/docs/user-guide/messages#understanding-the-structure-of-a-message | ||
| + | * Inak vysvetlené messages http://www.steves-internet-guide.com/node-red-message-object/ | ||
| + | * A hodi sa asi aj vysvetlenie ako je to s premennymi http://www.steves-internet-guide.com/node-red-variables/ | ||
* Dashboard podrobnejšie http://noderedguide.com/lecture-7-node-red-dashboard-part2/ | * Dashboard podrobnejšie http://noderedguide.com/lecture-7-node-red-dashboard-part2/ | ||
| + | * Komunikácia s IBM Watson https://developer.ibm.com/recipes/tutorials/connecting-raspberry-pi-gateway-watson-iot-using-node-red-part-ii/ | ||
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| + | |||
| + | |||
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| + | |||
| + | == '''Inštalácia''' == | ||
| + | |||
| + | 1. Najprv nainštalujeme odtialto Node.js | ||
| + | |||
| + | https://nodejs.org/en/ | ||
| + | |||
| + | '''Čo je node js?''' | ||
| + | Node.js is an open-source, cross-platform, JavaScript runtime | ||
| + | environment that executes JavaScript code outside of a web browser. | ||
| + | Node.js lets developers use JavaScript to write command line tools | ||
| + | and for server-side scripting—running scripts server-side to | ||
| + | produce dynamic web page content before the page is sent to | ||
| + | the user's web browser. Consequently, Node.js represents a | ||
| + | "JavaScript everywhere" paradigm,[6] unifying web-application | ||
| + | development around a single programming language, rather | ||
| + | than different languages for server- and client-side scripts. | ||
| + | |||
| + | Inštaláciu skontrolujeme | ||
| + | |||
| + | C:\>node --version && npm --version | ||
| + | |||
| + | U mňa bola odozva takáto | ||
| + | v12.14.1 | ||
| + | 6.13.4 | ||
| + | |||
| + | funguje to až keď po inštalácii zavrieme vsetky cmd okna a potom v novootvorenom cmd uz to funguje. | ||
| + | |||
| + | |||
| + | 2. Potom nainštalujeme z cmd konzoly Node-RED, pre linuxy je | ||
| + | popis na stranke, pre win je trocha zmena: | ||
| + | |||
| + | Spsutit cmd (ale run as administrator) | ||
| + | |||
| + | C:\>npm install -g --unsafe-perm node-red | ||
| + | |||
| + | (mne to skoncilo takto | ||
| + | node-pre-gyp WARN Using request for node-pre-gyp https download | ||
| + | ale nevadilo to) | ||
| + | |||
| + | |||
| + | 3. Po instalacii to uz funguje, takze staci spustit z cmd | ||
| + | |||
| + | C:>node-red | ||
| + | |||
| + | Musi to bezat v cmd okne na pozadi stale. | ||
| + | |||
| + | |||
| + | 4. A potom, tak ako je to aj v tom cmd okne napisane: | ||
| + | |||
| + | Server now running at http://127.0.0.1:1880/ | ||
| + | alebo http://localhost:1880 | ||
| + | |||
| + | |||
| + | Viac info tu: https://nodered.org/docs/getting-started/windows | ||
| + | |||
| + | First flow | ||
| + | https://nodered.org/docs/tutorials/first-flow | ||
| + | |||
| + | |||
| + | 5. Ukoncenie: | ||
| + | It can then be stopped by pressing Ctrl-C or by closing the terminal window. | ||
| + | Alebo na unixovych strojoch cez KILL a PID | ||
| + | |||
| + | |||
| + | Po inštalácii Node-RED budete mať k dispozícii iba základnú sadu uzlov. Dodatočné uzly je možné inštalovať priamo z editora, ale je to trochu skryté. Musíte kliknúť na ikonu menu v pravej hornej časti obrazovky a v menu vybrať funkciu Manage palette. Vyberiete si záložku Palette/Install. Do vyhľadávania napíšte nasledovné výrazy a nainštalujte si ich. | ||
| + | |||
| + | node-red-node-serialport | ||
| + | node-red-dashboard | ||
| + | |||
| + | Poznámka: nepotrebujeme ziadnu Arduino specific kniznicu, lebo ideme komunikovat cez seriovy port, co je ovela univerzalnejsie ako Arduino. | ||
| + | |||
Verzia zo dňa a času 15:45, 12. máj 2020
Quick Start
- Inštalácia: https://nodered.org/docs/getting-started/windows
- Online Node-RED environment FRED: https://fred.sensetecnic.com/
- START http://localhost:1880/
- Start Dashboard http://localhost:1880/ui
- Základy
- Node-RED Guide http://noderedguide.com
- Cookbook: https://cookbook.nodered.org/basic/map-between-different-number-ranges
- Knižnice: obvykle radia cez npm (node package manager), ale mne to velmi neslo, preto odporucam postup priamo z Node-RED menu: Settings -> Palette -> Install
- Ukladanie: vytvorené flows sa nikam extra neukladajú, ale ak by to náhodou spadlo, prídete o ne. Preto odporúčam cez Menu -> Export uložiť to čo potrebujete
- Koniec: Ctrl+C
Čo ďalej? Podrobnejšie informácie:
- Node-RED Guide: http://noderedguide.com
- Toto je dolezite pochopit https://nodered.org/docs/user-guide/messages#understanding-the-structure-of-a-message
- Inak vysvetlené messages http://www.steves-internet-guide.com/node-red-message-object/
- A hodi sa asi aj vysvetlenie ako je to s premennymi http://www.steves-internet-guide.com/node-red-variables/
- Dashboard podrobnejšie http://noderedguide.com/lecture-7-node-red-dashboard-part2/
- Komunikácia s IBM Watson https://developer.ibm.com/recipes/tutorials/connecting-raspberry-pi-gateway-watson-iot-using-node-red-part-ii/
Inštalácia
1. Najprv nainštalujeme odtialto Node.js
https://nodejs.org/en/
Čo je node js? Node.js is an open-source, cross-platform, JavaScript runtime environment that executes JavaScript code outside of a web browser. Node.js lets developers use JavaScript to write command line tools and for server-side scripting—running scripts server-side to produce dynamic web page content before the page is sent to the user's web browser. Consequently, Node.js represents a "JavaScript everywhere" paradigm,[6] unifying web-application development around a single programming language, rather than different languages for server- and client-side scripts.
Inštaláciu skontrolujeme
C:\>node --version && npm --version
U mňa bola odozva takáto
v12.14.1 6.13.4
funguje to až keď po inštalácii zavrieme vsetky cmd okna a potom v novootvorenom cmd uz to funguje.
2. Potom nainštalujeme z cmd konzoly Node-RED, pre linuxy je
popis na stranke, pre win je trocha zmena:
Spsutit cmd (ale run as administrator)
C:\>npm install -g --unsafe-perm node-red
(mne to skoncilo takto
node-pre-gyp WARN Using request for node-pre-gyp https download
ale nevadilo to)
3. Po instalacii to uz funguje, takze staci spustit z cmd
C:>node-red
Musi to bezat v cmd okne na pozadi stale.
4. A potom, tak ako je to aj v tom cmd okne napisane:
Server now running at http://127.0.0.1:1880/ alebo http://localhost:1880
Viac info tu: https://nodered.org/docs/getting-started/windows
First flow
https://nodered.org/docs/tutorials/first-flow
5. Ukoncenie:
It can then be stopped by pressing Ctrl-C or by closing the terminal window. Alebo na unixovych strojoch cez KILL a PID
Po inštalácii Node-RED budete mať k dispozícii iba základnú sadu uzlov. Dodatočné uzly je možné inštalovať priamo z editora, ale je to trochu skryté. Musíte kliknúť na ikonu menu v pravej hornej časti obrazovky a v menu vybrať funkciu Manage palette. Vyberiete si záložku Palette/Install. Do vyhľadávania napíšte nasledovné výrazy a nainštalujte si ich.
node-red-node-serialport node-red-dashboard
Poznámka: nepotrebujeme ziadnu Arduino specific kniznicu, lebo ideme komunikovat cez seriovy port, co je ovela univerzalnejsie ako Arduino.
V tychto prikladoch sme použili okrem iného:
- https://discourse.nodered.org/t/multiple-lines-on-a-graph-from-one-message/9315/4
- http://noderedguide.com/tutorial-node-red-dashboards-multiple-lines-on-a-chart/
- https://flows.nodered.org/node/node-red-contrib-ui-level - Pekny indikator
A sem dame jeden priklad na Dashboard s viacerymi prvkami