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Send Strings to Many Devices Using One Port
Sensiva
Junior Member
Have you guys seen a product that allows to send strings to many RS232 devices, something like a RS232 hub??
With the option of sending a string to one specific device or to all.
Thinking of that to save some RS232 ports.
With the option of sending a string to one specific device or to all.
Thinking of that to save some RS232 ports.
Comments
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1798
Otherwise call this outfit and see if they have something:
http://www.cpscom.com/rs232.htm
I've used one of their serial switches before.
Here's another bunch of items:
http://www.bb-elec.com/subcategory.asp?subcategoryid=93
You will probably have all kinds of timing issues and how will you identify the devices on the end?
Remember, AMX doesn't support DSR-DTR handshaking on their controllers, just RTS-CTS. Most of the combining units out there block the second device while the first device is transmitting data. After the first is finished, the second one can talk.
I was thinking of something from a well known manufacturer like ESI or Extron (IPL).
Explain in more details:
A device that has its own processor, Multiple Serial ports, its baud rates can be adjusted from its web interface or a PC installation utility.
Then if i want to send a string to device No. 1 saying blahblah
TO1-blahblah
and the responses will be converted to FROM1-blohbloh
and parsing these string in NetLinx is piece a cake
This is the cheapest per serial port I have seen to date - Sena PS810
It's very easy to communicate with via UDP or TCP. I have a project with five of these that have been working flawlessly for nine months.
http://www.sena.com/products/device_servers/external/hd_ps_x10/
I used Extron and Moxa serial port servers on other jobs. Sena has the best value.
I think Sena isn't what i am looking for, It can convert from IP to serial
I wanna send from serial to serial
It's been said before:
A slaved Axcent 3 bought on eBay is EXACTLY what you are looking for, solid as a rock, extremely configurable, no significant code changes required, and doesn't even use a serial port on the master.
as cheap as 300USD??
I don't know... I am asking.
I am thinking of a device that very much like slaving another old master, send to it a 2 part string the first is the address of the port and the second is the string it self, and sends me the responses in 2 part the first where it came from the second is the string it self.
Yeah... and How much??
Looks like the current bid is $49.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=260149367117&ssPageName=STRK:MEWA:IT&ih=016
Yes. I've got two that cost less than that.