{"id":2442,"date":"2019-02-28T16:27:30","date_gmt":"2019-02-28T15:27:30","guid":{"rendered":"https:\/\/www.nerdiy.de\/?p=2442"},"modified":"2021-12-18T17:42:31","modified_gmt":"2021-12-18T16:42:31","slug":"nodered-w-lan-networks-in-the-surroundings-display","status":"publish","type":"post","link":"https:\/\/nerdiy.de\/en\/nodered-w-lan-networks-in-the-surroundings-display\/","title":{"rendered":"HowTo: Node Red \u2013 Display W-Lan networks in the area"},"content":{"rendered":"

I have to admit that I haven't found a real use for this feature yet, but I'm sure someone will find some use for it.<\/p>\n

This article explains how you can use NodeRed and a Raspberry Pi to display the currently available WiFi in your area.<\/p>\n

\n

Safety instructions <\/span><\/h2>\r\n

I know the following notes are always kind of annoying and seem unnecessary. Unfortunately, many people who knew "better" have lost eyes, fingers or other things due to carelessness or injured themselves. Data loss is almost negligible in comparison, but even these can be really annoying. Therefore, please take five minutes to read the safety instructions. Because even the coolest project is not worth injury or other trouble.<\/span>
https:\/\/www.nerdiy.de\/sicherheitshinweise\/<\/span><\/a><\/em><\/strong><\/p>\r\n

Affiliate links\/advertising links<\/h2>\r\n

The links to online shops listed here are so-called affiliate links. If you click on such an affiliate link and make a purchase via this link, Nerdiy.de will receive a commission from the relevant online shop or provider. The price does not change for you. If you make your purchases via these links, you support Nerdiy.de in being able to offer other useful projects in the future. \ud83d\ude42\u00a0<\/em><\/p>\n

\n

Requirements<\/h2>\n

Helpful articles:
\n<\/strong>To be able to use this configuration, NodeRed should of course already be installed.
\nHow to prepare a RaspberryPi and then install NodeRed on it is described in the following articles.<\/p>\n

The following articles describe what has to be done to prepare the RaspberryPi so far:
\nRaspberryPi \u2013 setup for nerdiys!<\/a><\/em><\/strong>
\nRaspberryPi \u2013 The first configuration!
\n<\/a>RaspberryPi \u2013 Control the RaspberryPi via SSH<\/a><\/em><\/strong>
\nNodeRed \u2013 Installing NodeRed on the RaspberryPi<\/em><\/strong><\/a>
\nNodeRed \u2013 Install new nodes<\/em><\/strong><\/a><\/p>\n

Required material:
\n<\/strong>-no-<\/p>\n

Required material:<\/strong><\/p>\n

In the following list you will find all the parts you need to implement this article.<\/strong><\/p>\n

\n \n \n \n \n \n \n \n \n <\/colgroup>\n <\/table>\n \n \n \n<\/div>\n<\/div>\n
\n

Log into the NodeRed configuration interface<\/h2>\r\n

Before you can edit your NodeRed configuration, you must - if activated - first log into the NodeRed configuration interface.<\/p>\r\n

\"\"<\/a>
View of the login dialog. Here you have to enter the login data that you specified during the configuration of the login. You can find information about this in the article NodeRed - set up user login<\/strong><\/em><\/a>.<\/figcaption><\/figure>\n
\n

Install the required node<\/h2>\n

So that you can retrieve this current list of available W-Lan's you have to install the node \"node-red-contrib-wifiscan\". How to install nodes is described in the article NodeRed \u2013 Install new nodes<\/em><\/strong><\/a>\u00a0<\/strong>explained.<\/p>\n

\n

Import node code<\/h2>\n

In this example, the current list is retrieved when an inject node is activated and output formatted via a debug node. Of course, you can also use other nodes here to start or output the \"W-Lan list retrieval\".<\/p>\n

To import this example into your NodeRed installation, you need to import the node code below.<\/p>\n

\"\"<\/a>
This is what the output of the example looks like in the NodeRed Editor.<\/figcaption><\/figure>\n
\"\"<\/a>
Node configuration view.<\/figcaption><\/figure>\n

Node code:<\/strong><\/p>\n

[{"id":"a7fc9bb7.ffa278","type":"wifiscan","z":"8c9f8f17.13eb78","name":"","x":470,"y":720," wires":[["1166b120.2b169f"]]},{"id":"7aaa6018.cd772","type":"inject","z":"8c9f8f17.13eb78","name":"start scan ","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1, "x":300,"y":720,"wires":[["a7fc9bb7.ffa278"]]},{"id":"1166b120.2b169f","type":"function","z": "8c9f8f17.13eb78","name":"build list","func":"var temp=""; for (var i = 0; i <msg.payload.length; i++) \n    {\n        temp=temp+"SSID: "+msg.payload[i].ssid;\n        temp=temp+", Strength: "+msg.payload[i].signal_level+"dBm";\n        temp=temp+", Mac: "+msg.payload[i].mac;\n        temp=temp+", Channel: "+msg.payload[i].channel;\n        temp=temp+"\\n";\n    }\n\nmsg.payload=temp;\nreturn msg;\n","outputs":1,"noerr":0,"x":640,"y":720,"wires":[["392c3b92.f72184"]]},{"id":"392c3b92.f72184","type":"debug","z":"8c9f8f17.13eb78","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","x":790,"y":720,"wires":[]}]<\/pre>\n
\n
Have fun with the project<\/h2>\r\n
I hope everything worked as described for you. If not or you have questions or suggestions please let me know in the comments. I will then add this to the article if necessary.
Ideas for new projects are always welcome. \ud83d\ude42<\/p>\r\n
PS Many of these projects - especially the hardware projects - cost a lot of time and money. Of course I do this because I enjoy it, but if you think it's cool that I share the information with you, I would be happy about a small donation to the coffee fund. \ud83d\ude42<\/strong><\/p>\r\n
\"Buy<\/a>\u00a0 \u00a0 \u00a0 \u00a0   \"\"<\/p>","protected":false},"excerpt":{"rendered":"
I must admit that I haven't found a real use for this feature yet, but I'm sure someone will get some use out of it someday. 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Der Hintergrund war, dass ich so sicherstellen wollte, dass die eingelagerten Kartons,\u2026","rel":"","context":"In "Abendprojekt(<2h)"","block_context":{"text":"Abendprojekt(<2h)","link":"https:\/\/nerdiy.de\/en\/category\/evening-project2h\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2021\/12\/www.nerdiy.de-howto-zigbee-tuya-raumtemperatur-sensor-ts0201-ueber-zigbee2mqtt-in-nodered-einbinden-dsc04621-scaled.jpg?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2021\/12\/www.nerdiy.de-howto-zigbee-tuya-raumtemperatur-sensor-ts0201-ueber-zigbee2mqtt-in-nodered-einbinden-dsc04621-scaled.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2021\/12\/www.nerdiy.de-howto-zigbee-tuya-raumtemperatur-sensor-ts0201-ueber-zigbee2mqtt-in-nodered-einbinden-dsc04621-scaled.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2021\/12\/www.nerdiy.de-howto-zigbee-tuya-raumtemperatur-sensor-ts0201-ueber-zigbee2mqtt-in-nodered-einbinden-dsc04621-scaled.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/nerdiy.de\/wp-content\/uploads\/2021\/12\/www.nerdiy.de-howto-zigbee-tuya-raumtemperatur-sensor-ts0201-ueber-zigbee2mqtt-in-nodered-einbinden-dsc04621-scaled.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":17450,"url":"https:\/\/nerdiy.de\/en\/howto-zigbee-ikea-styrbar-button-e2001-e2002-via-zigbee2mqtt-in-nodered-integrate-2\/","url_meta":{"origin":2442,"position":5},"title":"HowTo: Zigbee - IKEA STYRBAR push button E2001\/E2002 via zigbee2mqtt into NodeRed","author":"Fab","date":"19. January 2022","format":false,"excerpt":"Der IKEA STYRBAR Taster ist etwas gr\u00f6\u00dfer als der kleine Bruder der Ikea TRADFRI E1743 Taster. Daf\u00fcr bietet er aber auch ein paar mehr Funktion und - aufgrund der zwei eingesetzten AA Batterien - eine l\u00e4ngere Batterielebensdauer. 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