<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Folks,<br><br>I’m writing an client using twisted, and I’m basing it off the Poetry client from <a href="http://krondo.com/wp-content/uploads/2009/08/twisted-intro.html">http://krondo.com/wp-content/uploads/2009/08/twisted-intro.html</a>.<br>I am porting a previous pyserial based client, so I’m running into new territory here.<br><br>And it’s working fine, there are two “issues" that I am running into.<br><br>class WT_Protocol(Protocol):<br><br> tag = ''<br><br> def to_bytes(self, seq):<br> """convert a sequence to a bytes type"""<br> #<br> # from pyserial.util<br> if isinstance(seq, bytes):<br> return seq<br> elif isinstance(seq, bytearray):<br> return bytes(seq)<br> elif isinstance(seq, memoryview):<br> return seq.tobytes()<br> else:<br> b = bytearray()<br> for item in seq:<br> b.append(item) # this one handles int and str for our emulation and ints for Python 3.x<br> return bytes(b)<br><br> def connectionMade(self):<br> print "Reseting the network"<br> reset = self.to_bytes(packets.network_reset() )<br> self.transport.write ( reset )<br> self.transport.write ( self.to_bytes(packets.Set_SiteCode(NodeID=255, SC1=0, SC2=0, SC3=0) ))<br> self.transport.write ( self.to_bytes(packets.Set_Gain_Packet(NodeID=255, Gain=1) )) # high gain<br> self.transport.write ( self.to_bytes(packets.Set_Protocol_No_Nulls (NetworkID=0, ReceiverID=0, NodeID=1) )) # high gain<br> time.sleep (.5)<br><br>Now the client works right now, but I’m concerned that I can’t figure out how to immediately read for a reply packet from the server.<br><br>For example, when I send the Set_SiteCode packet, I may receive a reply. <br><br>But how would that occur in the Twisted framework? In my testing the dataReceived function is not being called, so I can’t trap it there, plus I’m not sure how I would figure that logic.<br><br>Can anyone suggest a method to do this?<br><br>The second question, as far as I can tell, isn’t very solvable. I’d like to add a “Press Q to quit” type logic to the code. But I don’t see a way to do this easily in twisted? (platform unspecific, but it’s running Mac OS X / Unix right now).<br><br><span class="Apple-tab-span" style="white-space: pre;"> </span><span class="Apple-tab-span" style="white-space: pre;"> </span>- Ben<span class="Apple-tab-span" style="white-space:pre"> </span></body></html>