I'm working to a project which is about creating a simple 2 router and 2 virtual pc configuration on GNS3. I created it (look for the link of the screenshot below) but now i have to simulate a modbus traffic in this net. Is this possible? How can i do that?
here you have the screenshot of what i've done until now
https://mega.nz/#!GvhD2CbJ!cPIrwTXdE-L_cyqdo2Ac8XkUhEaiUMfeJ0BdHXNsOao
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I would like to understand it is possible to switch the ESP8266 connection between the cloud and WiFi LAN.
There are two paths to control the sonoff switch, connected to a wifi router. In case the phone is connected to the router, Path 1 acts as LAN network and ESP8266 can be controlled even without internet. In case I am not at home and would like to control the switch remotely via cloud, path 2 would be followed. Thus, I could get the best of both worlds.
From all the examples that i have seen so far ESP8266 could be operated in only one mode at one point of time, either Lan or cloud (both via the WiFi router).
So kindly help me with the switching code/logic, that will wait to work upon the commands provided via LAN mode if there are none left. Now it should work upon the instructions after switching to cloud mode and finally return to LAN mode after sometime and so on.
For security reasons your Sonoff device should not be reachable from the internet directly - ever. It should only be accessible within your local (home) network. That's your path 1.
To enable path 2 - without affecting the Sonoff device at all - you need a way to build a VPN from your smartphone to your local network. For the node it will look like all traffic is coming from your local network even though you are actually connecting into it from remote.
A fairly simple and cost-effective way to achieve this is to run PiVPN on a Raspberry Pi. See e.g. this video for instructions: https://www.youtube.com/watch?v=15VjDVCISj0
I have a raspberry pi (model 3 B+) acting as a wireless access point. I would like the pi to be able to connect to an available wifi network while remaining a wireless access point.
The use case for this would be as follows:
Connect to the access point from a laptop
From the laptop, navigate to pi_ip_address:port in a browser
From the browser, a list of available networks would be shown
From the browser, select an option and enter the password
From the Pi, connect to the selected network
Is this possible? If so, has anyone had success doing this and/or is there documentation available?
Thanks in advance
Just for reference the Sony Remote Camera API only works by using a 1:1 Wifi Connection
The Wifi signal strength of my Sony DSC-HX60V camera already drops after a few meters distance. But I want to be able to remotely control the camera over a range of 50 meter. There is no way that the onboard Wifi can achieve this range.
So now Iam looking for a solution to this problem. If it helps a local Wifi router exists that covers the whole range:
A normal Wifi repeater seems to be the best option, but according to a Forum Post using a repeater does not work, because the repeater acts a client and the camera can only connect to one client at the same time. Did someone got it to work with a repeater?
Additionaly I was thinking about using a Raspberry Pi with a second Wifi adapter that connect to the local Wifi and manages the API requests.
Any other ideas?
Disclaimer:
Even tho this Question may be more Hardware and Network related and thereby fits more into the SuperUser Network. A working Network connection does not necessary imply that the API is working aswell. This is why I posted this Question here
If you have a router which can work in 'client mode' that should be able to make a 1:1 connection with the camera, and then present that link over ethernet - you may have issues with network addresses and/or discovery if your main network is a different IP range to what the camera offers/DHCP's.
Some of the Sony cameras support 'multi-wifi' where the camera connects to an external device (normally the LiveViewRemote, but can be a router). Unfortunately the HX60 (and presumably any of the Play Memories SmartRemote app based ones) does not seem capable of this.... maybe the QX1 is an exception as it's supposed to work like this.
This connection connection is managed via WPS, and once connected the RemoteAPI works well. Works for my AS100.
If you are looking to set up a RaspPi, I can confirm that it works with this Python library:
https://github.com/Bloodevil/sony_camera_api
https://www.youtube.com/watch?v=xR3gAfu4Hfw
A mate and I are doing a project at the moment that hosts a webpage on a raspberry pi which I would like to send a message via MQTT to the arduino which reads sensors and then sends the values back to the pi to be displayed on the web page.
I am hoping to use Mosquito on the pi as a broker and treat the arduino and the webpage as clients.
I am just having a lot of trouble working out how it all fits together.
A lot of examples I have seen use web sockets and node.js and MQTT.io and I'm just so confused..
Could someone please help me piece it all together and explain how everything fits and what it does?
Thanks in advance!
Websockets allows a web browser to open a bi-directional communication pipe to a server.
For websockets to work you need a websocket enabled mqtt broker. At the moment you have to install this seperately, some examples of what is out there are here. Mosquitto will have websockets enabled in the next version, 1.4, you can compile it if you wish.
An example of what can be done, and what I am doing atm with mqtt and websockets is;
publish temperature data to mqtt broker from an arduino.
subscribe to the topic that the arduino is publishing to and populate the data into a mysql database using python scripts.
have a live website subscribe to the topic and show the current temperature as a line graph.
We did tutorials on building applications with MQTT and websockets in the past. Slides (+ Code) can be found on Slideshare.
If you're interested in how MQTT over websockets works in detail, this blog post may help you. Also, a full example websockets/MQTT application tutorial can be found in this blog post.
Im looking for a network simulator similar to ciscos packet tracer but does more types of devices then just ciscos. Anyone know of a such program? Im not wanting to actually send fake traffic over my network but emulate a fake network within one computer.
I would give you two points if I could for anyone that lists open source links.
Found GNS3 and it works great and can even send out fake packets on a virtualized network or the fake network limited to the gui in the software.
Found GNS3 except I can not figure out how to add a pc to configure.
Anyone know how to do so? They list a tutorial but not one with virtual pc or virtual box.
Edit:
heres the GNS3 website to download their program:
http://www.GNS3.net