http://forums.leaflabs.com/topic.php?id=13455 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:20:44 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=13455#post-28627 Fri, 30 Aug 2013 09:37:18 +0000 victoroza 28627@http://forums.leaflabs.com/ <p>Hi gbulmer,</p> <p>Basically we have an outdoor test site that is about 200 m away from my work station. The test site has Maple Mini doing some useful DAQ. I would like to have the data stream to my PC. At the test site we have Ethernet access. </p> http://forums.leaflabs.com/topic.php?id=13455#post-28621 Fri, 30 Aug 2013 04:29:53 +0000 gbulmer 28621@http://forums.leaflabs.com/ <p>victoroza - would you please explain what you are trying to achieve and what your constraints are? </p> <p>It is often easier for people to help if they understand what it is you need to do, but harder for them to help when they are reacting to pieces of a possible solution.</p> <p>(Full disclosure: I am not a member of LeafLabs staff.) </p> http://forums.leaflabs.com/topic.php?id=13455#post-28615 Thu, 29 Aug 2013 19:28:55 +0000 ala42 28615@http://forums.leaflabs.com/ <p>For just 10m you usually use RS232. Search ebay for MAX3232 to find some cheap converter modules.<br /> If it should be RS485 you can use one or two MAX485, which also cost about nothing on ebay. With just one you can only use half duplex communication.<br /> If you write the software for the maple and the PC yourself, you could also use a cheap ENC28J60 ethernet module, but this requires more software effort that using the standard USART functions and using a virtual comport on the PC.<br /> For firmware updates you still need a USB connection or have to use a custom bootloader.<br /> So there are lots of options. </p> http://forums.leaflabs.com/topic.php?id=13455#post-28614 Thu, 29 Aug 2013 18:43:29 +0000 victoroza 28614@http://forums.leaflabs.com/ <p>Thank you ala42 for your response. In my case the data rate doesn't play a big role. What I have is the RS-485 over Ethernet converter at the remote test site. What I want is to be able to connect to Maple over RS-485, somehow, to be able to see it on my PC. The distance between the Maple and RS-485 over Ethernet is about 10 m. I also have RS-232 port available at my disposal on that converter. Any suggestions? </p> http://forums.leaflabs.com/topic.php?id=13455#post-28612 Thu, 29 Aug 2013 18:33:59 +0000 ala42 28612@http://forums.leaflabs.com/ <p>No, as the maple board can not act as USB host.<br /> RS485 is usually used in half duplex mode on a 2-wire bus having several devices connected. If you really want that you can connect a RS485 driver to a maple USART.<br /> If you just need a point to point connection a RS422 connection is probably better.<br /> Main question is what data rate and line distance do you have, which protocol and duplex mode has to be used ? </p> http://forums.leaflabs.com/topic.php?id=13455#post-28611 Thu, 29 Aug 2013 18:00:51 +0000 victoroza 28611@http://forums.leaflabs.com/ <p>So what I meant is connect Maple to USB-to-RS485 adapter, then use another adapter of the same kind to connect Maple to a PC. </p> http://forums.leaflabs.com/topic.php?id=13455#post-28610 Thu, 29 Aug 2013 17:56:08 +0000 victoroza 28610@http://forums.leaflabs.com/ <p>Dear all,</p> <p>I have a question that I can't seem to find answer for. Is it possible to use USB-to-RS-485 adapter and then the same adapter to a PC to basically extend the connection range to a Maple.</p> <p>Any suggestions would be appreciated. </p>