maybe blynk local server could run if there is only WiFi but the gateway must be online and DHCP running.
to try …
@Blynk_Coeur: No need for a gateway if you don’t want to go to the internet. Server, App and nodemcu are in the same IP subnet. The minimum needed is a PC/Laptop and a small “router” that has Wifi.
I’ve tested a setup like this with a small 3G access point with no SIM card in it - i.e. not internet connection.
In its config I only had to allow the connected device to communicate internally.
yes , only in that case, but router is needed.
I am testing same method. I have already tested dht11 and other with nodemcu using local Web server using client app. But I can’t able to connect using blynk app. I don’t have Internet connection but just using laptop nodemcu WiFi router. And connected locally
Given. But that is the scenario we are talking about … 
Currently I am trying simple evirtual led using
Blynk software. I have configured like shown in example. Only there is no where mention about Internet connectivity. So I am facing this issue. Like I share you tube video I need to test it out.
I have tested nodemcu with local server without Internet using client application. But I can’t able to connect locally using blynk.
It’s entirely possible to run local server without an Internet connection. In fact, you can do it without a router, wireless access point etc if you wish. See this topic:
@ajitnayak87 if you want others to help you with your problem then your communication needs to be much clearer and more detailed. You need to explain your network architecture in detail, and show how you’ve set-up your app, including which port you’ve chosen in your app configuration.
Pete.
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Blynk consists of three parts, The App, the Server and the MCU (Arduino, ESP, RPi (as client), etc.) that runs the Blynk Library & script. All three must communicate together, via a network.
APP ← network/internet → SERVER (Cloud or Local) ← network/Internet → MCU
If the server used is the default Cloud Server, then that requires the internet. However you can install a Local Server on a PC or Linux device like a Raspberry Pi (as server), and then run everything on an internal network.
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Just did a test with local server running on my Windows PC. App and ESP-01 connected to a LAN/Wifi router with the PC in the same IP subnet. Working 100% without problem.
On thing to consider:
For this test I simply start the server with
java -jar server-0.39.1.jar -dataFolder ./Blynk
Without using port forwarding on the server PC from port 80 to port 8080 or changes in the server.config
the IP port 8080 needs to be explicitly defined in Blynk.begin() as shown in the corresponding examples.
This does NOT work as the default port 80 is used:
Blynk.begin(auth, "WLANxxx", "PASSyyyy", IPAddress(192,168,2,10));
This does work:
Blynk.begin(auth, "WLANxxx", "PASSyyyy", IPAddress(192,168,2,10), 8080);
can you guide me in detial … how to add java sdk and What are things you applied to make work on local server
Sorry for my English. I may not communicate properly here .
I have Nodemcu Hardware -> Wifi router which are all connected to same network . I have blynk app connected to same network .
i would like to create a local server where i could develop APP that can communicate via app locally .
Local Webserver that can be used to view data locally . I am thinking of using Nodered for local web communication later use port forwarding
These plan to execute my project @ first level. Since i am new to this how can i go ahead here.
1)which Platfrom used to create own dashboard with local server
2) How can i create my own local server without connect internet. I tried following link . But facing issue while installation
If you can’t even get the local Blynk server setup to run without an internet connection then I think you’re being far too ambitious with your overall project.
Personally, I don’t see why you need a dashboard in addition to Blynk.
Pete.
I am using NodeMcu as wifi module. I would like to create own dash board for my server using nodered server . Can someone guide me how can i link using nodemcu with node red.
I wanted to use Nodemcu only for node red websockets.
Few pages to read:
I use Node-Red with the Blynk ws contrib from @gab.lau
I don’t run any Blynk specific code on my NodeMCU devices, just MQTT code to communicate with my Node-Red server. All the Blynk magic happens within Node-Red. I use the Blynk cloud server.
All of this works very well, and I run a fairly complex home automation setup this way.
The one thing I would say is that I dint really like the Node-Red dashboard. It’s very clunky and if you also want to have controls on your dashboard that mirror your Blynk widgets then that gets quite messy. It was the poor Node-Red dashboard that led me in the direction of Blynk.
If you’re planning on running Node-Red on a Raspberry Pi or similar and don’t already have one built then I’d reccomended Peter Scargill’s (@scargill) script:
https://tech.scargill.net/?s=the+script
Pete.
Which is best platform to develop own dashboard that can be easily integrated with nodemcu & blynk app, Bynk hardware.
Which will have more option like Node red
Please don’t start multiple threads on the same basic subject. Keep everything together in one thread.
Pete.
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I merged the two topics together.
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