Method Method Undocumented Method Reliably write some data. Method Undocumented Method Called when the serial port disconnects. Method Finish setting up the serial port. Inherited from (via ): Method Override this method to insert custom logging behavior. Its return value will be inserted in front of every line. It may be called more times than the number of output lines.
Method Determine the log prefix to use for messages related to applicationObject, which may or may not be an provider. Inherited from (via ): Method Override this method to insert custom logging behavior. Its return value will be inserted in front of every line. It may be called more times than the number of output lines. Method Determine the log prefix to use for messages related to applicationObject, which may or may not be an provider. Inherited from (via ): Method Override this method to insert custom logging behavior. Its return value will be inserted in front of every line.
It may be called more times than the number of output lines. Method Determine the log prefix to use for messages related to applicationObject, which may or may not be an provider. Inherited from (via ): Method Override this method to insert custom logging behavior. Its return value will be inserted in front of every line. It may be called more times than the number of output lines.
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Method Determine the log prefix to use for messages related to applicationObject, which may or may not be an provider.
It depends what you mean. Autobahn WebSockets for Python is based on Twisted. Twisted has first class support for serial ports.
So you can transfer data from/to serial port and forward that via WebSockets (using Autobahn). In other words: when you have a device which is able to run Python/Twisted, and that device has a serial port which connects to your microcontroller, it'll work.
However I don't think you can run Python/Twisted on i.e. PIC itself. Hope that helps, Tobias yOPERO 03:15. Tobias Thanks for your answer, you got it right. So far I have been able to transfer data to/from a microcontroller to the PC using a python script based on PySerial. I have been doing some data plotting using PyQt but I want to achive the same functionality using a web browser. Autobahn looks perfect I will keep testing the examples provided and hopefully at some point I will grab the concept and make it work.
Thanks again. On Jan 24, 11:05 am, Tobias Oberstein wrote: Tobias Oberstein 04:16. This sounds interesting! Let me help you (hopefully) a bit. 1) The first thing to get working is your serial port transfer using Twisted serial support, instead of PySerial. I have not done that before. But it should be documented.
There should be code you can look. Ask on Twisted mailing list if you run into questions.
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2) When you got that, you will want the Twisted event loop to run both your serial port factory/protocol and Autobahn. In general with Twisted, you 'add' factories/protocol to the reactor, and then start the reactor. In your serial port factory, you then need to have a reference to the Autobahn factory and vice versa to shuffle data between both. I can help you with that. 3) I would suggest the following: you want browser clients.
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To render to a canvas receiving data from serial mediated via Autobahn. You could use raw WebSockets and 'invent your own pubsub' over WebSockets. But why reinvent the wheel? Autobahn has built-in RPC/PubSub on top of WebSockets.
You get that for free, plus the appropriate JavaScript lib for browsers. If you go that route, essentially, after having received data from serial, you just need to call WampServerProtocol.dispatch WampServerFactory.dispatch and the data gets published to all subscribed clients. JS in browser.
You then only need to subscribe to your topics in JS and are ready to go. So: serial port = your Twisted serial protocol = WAMP factory = WAMP clients (like browsers). The point is: with WAMP PubSub usually clients publish to a topic, and that gets dispatched to all (other) clients subscribed to that topic. In your case, you want to publish not from client, but from server. See the 'dispatch' methods above. If it's unclear what I suggest with above, feel free to ask here.
Tobias yOPERO 08:01. Hi Tobias Glad you are also interested on this topic!
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First things first. I have been looking to point 1 in the list you gave me and I found out that 'serialport.py' on Twisted calls pyserial. Also I found this code where people connects to a AVR via serial port using twister. Once I get it working I will pass the code and see how we can atack point 2.
Python Twisted Web
On Jan 24, 1:16 pm, Tobias Oberstein wrote: WampServerProtocol.dispatch WampServerFactory.dispatchyOPERO 14:52. Ok, see here: (caution: I couldn't test it, since I lack a serial source and have problems on Windows. I walk you through the code: 1) lines 34/35 = need to import relevant Autobahn stuff. Here we directly use WAMP modules, since this will be easier to achieve what you want than to use raw WS (which you could do of course also, if you insist) 2) lines 18/19/37/38 = this is not relevant for you. But relevant to my problem of getting serial work under windows.see later 3) lines 132-136 here we create the WS/WAMP factory/protocol. Line 136 will connect it to the reactor 4) line 152, line 69-72 your serial protocol instance Echo now gets a reference to wsMcuFactory 5) line 108 this is the core of the gateway code.
Upon receiving stuff via serial, we dispatch a PubSub event to the topic URI. = all clients subscribed to that topic will receive it. I'll show you how to do that for JS later 6) lines 40-47 this is our WS-MCU protocol. Nothing to do here but register the topic we want to use. There is a complete PubSub example with JS and Python clients, and Python server here: thats it. Please try it (I couldnt. If that works, we then go on from here.
A) JS client b) add RPC so that you can push something from JS client to MCU. Now my problem: Windows. I installed PySerial. That was a fast start;) so now you have the basics MCU = JS running.
Btw: should you eveer need a native Android app, Autobahn/WS+WAMP is available for that also. Now, for the other direction (JS = MCU).
Do you need that also? If so, I can extend the code so you can do that via RPC (part of WAMP). What MCU hardware are you using? And how do you connect that to your PC?
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I mean: last time I saw a DSUB-9 connector on a PC is long ago. Do you use USB? I wanna try myself;) yOPERO 04:08. About Android of course, nowadays it is kind of easy to connect an MCU to android via Blueetooth. For the other direction (JS = MCU).
I need that also. To make it simple I am going to put a led to the MCU which is programmed to switch on when it receives 1 and switch of when receiving a 0. So please change the code if you have time to. Yesterday I was working with a PIC but today I have an arduino arduino.cc it is a ready made unit no need of soldering,etc. You should give it a try it is very straight forward similar to C but much more easier. Yes I do connect the Arduino using a USB, in general you can connect a MCU using usb(serial port) bluetooth(serial port) you have also an ethernet module you can attached to it(can work as server or client) finally you have wireless technologies such wifi and xbee.
What I am trying to achive is this: I do still have a question, how do I do for displaying that data on a webpage. Regards, yOPERO On Jan 25, 12:51 pm, Tobias Oberstein wrote: Tobias Oberstein 04:53. Sser.py sser.html needed to refactor the code a little. If it doesnt make sense to you, ask. Start, then open: in browser. Press buttons.
You need to implement your actual control code in McuProtocol.controlLed = should work by self.transport.write. Send to serial regarding Android. I meant the following: You have PCMCU running. Then you can connect to PC from any browser to get your UI. OR you can connect from Android native app to PC for alternative UI. When your PC has a public IP (that is, its on the internet), you can access the UI (browser and Android) from anywhere.
about your UI: I'd suggest a so-called 'single-page app' approach. This is: you have only a single html page, and all the interesting stuff happens via JS. Thanks for explaing USB/serial/MCU btw. Hope that gets you going.
Would be nice if you keep us up to date about your progress on this list. Cheers, Tobias yOPERO 05:29. YOPERO, to show current values, essentially you need to insert and then in JS in the event handler do: document.getElementById('temp').innerHTML = event0; for graphics, you can use i.e. Html5 canvas or other techn. would you mind sending me the arduino code you use? Some bare bone code would be cool,. I want to order an Arduino and try myself;) ps: I will polish up the code a little and include it in Autobahn tests/demo.
Only barebone code. Hope this is ok for you. Cheers, Tobias yOPERO 05:57. Try insert self.transport.write('6') after line I can't try myself now. Hopefully I get hands on an Arduino this weekend. When I do, I extend the example and then I can give you a verified walkthrough. Am 14:25, schrieb yOPERO: Hi Tobias I have been trying real hard to create the lines that would send data to Arduino using the buttons on index.htmlI am afraid my knowledge in python is very basic and twisted is new to me.
Twisted Serial Port Python Download
To be honest I am far from getting there so I hope you can help me out a bit specially on the overall concepts. I have my arduino ready to receive data( '6' in this case) when arduino receives 6 it switchs on the led and sends back the state of the led. I have tested it on a serial terminal and works fine. Also I am able so send the state of the led to the ws and visualize it on index.html. I know that when the button on index.html changes its state it is send back to serial2ws.py. my doubt is how to capture that state change on the serial2ws.py and how to send to the serial port the captured data. yOPERO 07:33.
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