[Twisted-Python] Question : Combining wokel XMPP and twisted.internet.serial
Dear All .. A year ago, I need send some defined message to a jabber conference. The message content will depend on a "button-press". My trick is to use ttyctrl (http://ttyctrl.sourceforge.net/). So basicaly my "system" is builded from several parts: 1. TTYCTRL : I made some small python XMLRPC client script, that will send a msg to my local twisted server 2. Twisted server, contain : a. an XMLRPC server b. XMPP Client ... use to send msg to remote jabber conference room I made a pastebin of that twisted script at : http://pastebin.com/iSRVZNwS With that script the flow alway one-way only : serial====>Twisted_XMLRPC--->Twisted_XMPP=====>Jaber Now I need to do something different, since it's hard to find a Board with RS232 onboard. I Need to replace TTYCTRL with Arduino MCU. Arduino will Send serial data to my PC. So I'll need my twisted to able to receive data via serial There will also incoming XMPP msg from Jabber that will need to be send to arduino via Serial port. so the flow will be like : serial<====>Twisted_Serial<--->Twisted_XMPP<=====>Jaber My question is, How to make : 1. twisted.internet.serial to send data via an instance of XMPP client ? and 2. my EchobotProtocol.onMessage (see pastebin), to write data to the same serial port used by Point#1 above. Sincerely -bino-
On Dec 21, 2011, at 9:52 PM, bino oetomo wrote:
Dear All ..
A year ago, I need send some defined message to a jabber conference. The message content will depend on a "button-press". My trick is to use ttyctrl (http://ttyctrl.sourceforge.net/).
So basicaly my "system" is builded from several parts: 1. TTYCTRL : I made some small python XMLRPC client script, that will send a msg to my local twisted server 2. Twisted server, contain : a. an XMLRPC server b. XMPP Client ... use to send msg to remote jabber conference room
I made a pastebin of that twisted script at : http://pastebin.com/iSRVZNwS
With that script the flow alway one-way only : serial====>Twisted_XMLRPC--->Twisted_XMPP=====>Jaber
Now I need to do something different, since it's hard to find a Board with RS232 onboard. I Need to replace TTYCTRL with Arduino MCU. Arduino will Send serial data to my PC. So I'll need my twisted to able to receive data via serial There will also incoming XMPP msg from Jabber that will need to be send to arduino via Serial port.
so the flow will be like : serial<====>Twisted_Serial<--->Twisted_XMPP<=====>Jaber
My question is, How to make : 1. twisted.internet.serial to send data via an instance of XMPP client ? and 2. my EchobotProtocol.onMessage (see pastebin), to write data to the same serial port used by Point#1 above.
This is a relevant FAQ for this situation: http://twistedmatrix.com/trac/wiki/FrequentlyAskedQuestions#HowdoImakeinputo... More specifically: 1. Create a Protocol class for your SerialPort that will communicate with the Arduino. Instances of this class will have access to the serial transport and can write out to the serial port. Incoming messages from the Arduino will be handled by the dataReceived method of the protocol. 2. Give your EchoBotProtocol a reference to the SerialPort somehow (e.g. via init), and set a reference to the EchoBotProtocol on the SerialPort. Here's a quick sketch: # Basic line receiver protocol class ArduinoReceiver(LineReceiver): def lineReceived(self, line): print "Line Received from Arduino" self.echobot.send('some xmpp message for which I do not know the format') # Wire up the serial port and protocol...note there are more parameters to create the SerialPort (baudrate, etc.) serial = SerialPort(ArduinoReceiver, '/dev/tty.usbserial', reactor) # EchoBot gets a reference to the serialport class EchoBotProtocol(MessageProtocol): def __init__(self, serial, *args, **kwargs): self.serial = serial # Set a reference to self on the serial protocol self.serial.protocol.echobot = self MessageProtocol.__init__(self, *args, **kwargs) def onMessage(self, msg): self.serial.transport.write('some message\n') echobot = EchoBotProtocol(serial) ...and an update to your pastebin that may be helpful for context: http://pastebin.com/2EJ22wXa
Dear Lucas Taylor Thankyou for your fast enlightment. It's time for me to re-build my ejabberd turnkey linux Sincerely -bino- On 12/22/2011 01:12 PM, Lucas Taylor wrote:
This is a relevant FAQ for this situation: http://twistedmatrix.com/trac/wiki/FrequentlyAskedQuestions#HowdoImakeinputo...
More specifically: 1. Create a Protocol class for your SerialPort that will communicate with the Arduino. Instances of this class will have access to the serial transport and can write out to the serial port. Incoming messages from the Arduino will be handled by the dataReceived method of the protocol.
2. Give your EchoBotProtocol a reference to the SerialPort somehow (e.g. via init), and set a reference to the EchoBotProtocol on the SerialPort.
Here's a quick sketch:
# Basic line receiver protocol class ArduinoReceiver(LineReceiver): def lineReceived(self, line): print "Line Received from Arduino" self.echobot.send('some xmpp message for which I do not know the format')
# Wire up the serial port and protocol...note there are more parameters to create the SerialPort (baudrate, etc.) serial = SerialPort(ArduinoReceiver, '/dev/tty.usbserial', reactor)
# EchoBot gets a reference to the serialport class EchoBotProtocol(MessageProtocol): def __init__(self, serial, *args, **kwargs): self.serial = serial # Set a reference to self on the serial protocol self.serial.protocol.echobot = self MessageProtocol.__init__(self, *args, **kwargs)
def onMessage(self, msg): self.serial.transport.write('some message\n')
echobot = EchoBotProtocol(serial)
...and an update to your pastebin that may be helpful for context: http://pastebin.com/2EJ22wXa
Dear Lucas I realy appreciate your pastebin On 12/22/2011 01:12 PM, Lucas Taylor wrote:
...and an update to your pastebin that may be helpful for context: http://pastebin.com/2EJ22wXa
When I first try to adapt your script, there is error complaining about that "serial" have no "setParent" attribute/methode. Next I found your enlightment at http://www.mentby.com/lucas-taylor/serialport-protocol-as-a-service.html So here is my adaptation at http://pastebin.com/79qi3TfK currently I just commented the line that send xmpp, I just want to make sure that the serial communication is working well. When there ls line comming via serial line, the script just work as told : ---from the log file ---- 2011-12-23 09:31:29+0700 [-] Line Received from Arduino: This is arduino 2011-12-23 09:31:31+0700 [-] Line Received from Arduino: This is arduino 2011-12-23 09:31:33+0700 [-] Line Received from Arduino: This is arduino 2011-12-23 09:31:35+0700 [-] Line Received from Arduino: This is arduino 2011-12-23 09:31:37+0700 [-] Line Received from Arduino: This is arduino 2011-12-23 09:31:39+0700 [-] Line Received from Arduino: This is arduino 2011-12-23 09:31:41+0700 [-] Line Received from Arduino: This is arduino ----------------------------- The problem is when there is msg coming from XMPP part It's received by the xmpp client part, but script complaining about 'SerialPort' object has no attribute 'transport' I tried to send text from another xmppclient (pidgin) ---from the log file ---- 2011-12-23 09:31:29+0700 [XmlStream,client] <<<<>>>>>>> 2011-12-23 09:31:29+0700 [XmlStream,client] 2011-12-23 09:31:29+0700 [XmlStream,client] DDDDooooooohhhhh 2011-12-23 09:31:29+0700 [XmlStream,client] 2011-12-23 09:31:29+0700 [XmlStream,client] <<<<>>>>>>> 2011-12-23 09:31:29+0700 [XmlStream,client] 2011-12-23 09:31:29+0700 [XmlStream,client] Unhandled Error ------------------------------ ----And the traceback is------- File "./mytac01.tac", line 42, in onMessage self.serial.transport.write('some message\n') exceptions.AttributeError: 'SerialPort' object has no attribute 'transport' -------------------------------------- ----Line 42 is ---- self.serial.transport.write('some message\n') --------------------- I tried to google with the error msg as keyword ... mostly about Serial port loosing connection. In my case , the serial port still have it's connection ..... since the arduino msg still coming Sincerely -bino-
On 02:50 am, bino@indoakses-online.com wrote:
[snip] The problem is when there is msg coming from XMPP part It's received by the xmpp client part, but script complaining about 'SerialPort' object has no attribute 'transport' I tried to send text from another xmppclient (pidgin)
A SerialPort doesn't have a transport. It is a transport. Instead of: self.serial.transport.write(foo) try self.serial.write(foo) Jean-Paul
Dear Jean-Paul Thankyou for your help. On 12/23/2011 09:57 AM, exarkun@twistedmatrix.com wrote:
A SerialPort doesn't have a transport. It is a transport. Instead of:
self.serial.transport.write(foo)
try
self.serial.write(foo)
Here is my function (edited) -------START------- def onMessage(self, msg): #Will just print the msg body to stdout self.writethis = msg.body print '<<<<>>>>>>>\n' print self.writethis print '\n<<<<>>>>>>>\n' # Send something to serial port #self.serial.transport.write('some message\n') self.serial.write(self.writethis) ---------------------- the "print self.writethis" do as told but the "self.serial.write(self.writethis)" line raise an exceptions ----------START------------- File "./mytac01.tac", line 44, in onMessage self.serial.write(self.writethis) File "/usr/lib/python2.6/dist-packages/twisted/internet/abstract.py", line 191, in write self._tempDataLen += len(data) exceptions.TypeError: object of type 'Element' has no len() -------------------------- Sincerely -bino-
Jean-Paul
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On Fri, Dec 23, 2011 at 11:09:32AM +0700, bino oetomo wrote:
the "print self.writethis" do as told
but the "self.serial.write(self.writethis)" line raise an exceptions ----------START------------- File "./mytac01.tac", line 44, in onMessage self.serial.write(self.writethis) File "/usr/lib/python2.6/dist-packages/twisted/internet/abstract.py", line 191, in write self._tempDataLen += len(data) exceptions.TypeError: object of type 'Element' has no len() --------------------------
It looks like "self.writethis" is an Element, not a string. Python's print statement will automatically call str() on things before it prints them, but Twisted's .write() methods do not. You'll have to change your code to something like this: self.serial.write(str(self.writethis)) Tim.
Dear Tim Allen and Jean-Paul I realy appreciate your enlightment .. i try it and it works Sincerely -bino- On 12/23/2011 11:15 AM, Tim Allen wrote:
It looks like "self.writethis" is an Element, not a string. Python's print statement will automatically call str() on things before it prints them, but Twisted's .write() methods do not. You'll have to change your code to something like this:
self.serial.write(str(self.writethis))
Tim.
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participants (4)
-
bino oetomo -
exarkun＠twistedmatrix.com -
Lucas Taylor -
Tim Allen