Jee Labs Talk » Topic: Ethernet?

Jee Labs Talk » Topic: Ethernet? http://talk.jeelabs.net/topic/102 Discussion about Jee Labs projects en-US Tue, 07 Sep 2010 00:33:14 +0000 http://bbpress.org/?v=1.0.2 <![CDATA[Search]]> q http://talk.jeelabs.net/search.php Jean-Claude on "Ethernet?" http://talk.jeelabs.net/topic/102/page/3#post-892 Fri, 05 Mar 2010 23:33:23 +0000 Jean-Claude 892@http://talk.jeelabs.net/ Here's one - http://www.watterott.com/index.php?page=search&desc=on&sdesc=on&keywords=wifi s.mihai on "Ethernet?" http://talk.jeelabs.net/topic/102/page/3#post-887 Fri, 05 Mar 2010 13:09:47 +0000 s.mihai 887@http://talk.jeelabs.net/ anyone got any idea of some european resellers for wifi modules - arduino plugs to be converted to jeenode plugs - ... i've tried sparkfun but taxes and transport are very high. ... bmj on "Ethernet?" http://talk.jeelabs.net/topic/102/page/3#post-866 Wed, 03 Mar 2010 09:56:12 +0000 bmj 866@http://talk.jeelabs.net/ Hi Ethernet as a plug or board is a very good idea! I'm currently using a Arduino, the official WisNet shield and a radio-module on a breadboard shield. As long as you only need to push data to e.g the Pachube site it works well and the limited number of incoming connection is not a problem. The software in my system is designed to solve only one task but it should be relatively easy to develop a sketch for the ethernet node that has a configure block in the beginning letting the user map the incoming bytes to “ASCII” in valid xml and push it out on Internet. E.g … <Node> <ID>6</ID> <Temp>22.3</Temp> </Node> ... Maybe power over ethernet should be considered? I don't think battery is an option unless you use a very exotic WiFi module but I maybe wrong? andras on "Ethernet?" http://talk.jeelabs.net/topic/102/page/2#post-856 Tue, 02 Mar 2010 15:28:55 +0000 andras 856@http://talk.jeelabs.net/ I Just wanted to report back on my experience on the nuelectronics ENC28J60 based ethershield. I got myself one just out of curiosity (15 euro's, so not too expensive). First thing to do is to get the latest Tuxgraphics driver because the one on the nuelectronics site is outdated (that version won't even allow to route your packets through a gateway). You can get it from http://blog.thiseldo.co.uk/?p=329. The driver works somewhat similar to the rf12_easy* functions where you regularly call a polling function that will handle some state that the library user needs not to know about. This way you can repond to http server request and perform a http GET in parallel. You can register a callback function that will react to the http result code of your GET once the request is completed. Similarly, you can register other callbacks (even a callback so you can check out who pinged you). There are some helper functions to make life easier, like an urlencoder so simplify assembling strings. The library is mainly http oriented with a bit of udp en icmp extra's. No generic sockets like in the official Arduino ethernet library. All in all a usefull and easy to use library which works ok. You have to be aware of some limitations; the library can send only one TCP segment in a socket session, but for many applications that doesn't have to be a problem. Also note that there isn't much documentation, but if you examine the examples it becomes clear how it works. One other thing that is noteworthy is that the ENC28J60 draws about 200mA, so it is a bit power hungry (it becomes warm, but not hot, to the hand). Then again, the Wiznet module specifies a 150mA draw, so relatively speaken it is not that bad. Rubi on "Ethernet?" http://talk.jeelabs.net/topic/102/page/2#post-602 Sun, 24 Jan 2010 12:30:38 +0000 Rubi 602@http://talk.jeelabs.net/ Hi Sorry I buy them from Sparkfun. Shipping is about 10$ or 6€. Not too bad imho. Cheers Rubi s.mihai on "Ethernet?" http://talk.jeelabs.net/topic/102/page/2#post-601 Sun, 24 Jan 2010 11:36:36 +0000 s.mihai 601@http://talk.jeelabs.net/ @Rubi: any idea where i could get one of those wired ones in Europe (i hate customs taxes and crazy shipping rates) but he's got a point about WiFi, it's a lot more flexible than wired. Rubi on "Ethernet?" http://talk.jeelabs.net/topic/102/page/2#post-599 Sun, 24 Jan 2010 10:55:09 +0000 Rubi 599@http://talk.jeelabs.net/ Hi I would prefer a Wiznet Chip. They are more powerful and easier to program. The Enc is pretty low level. It is like a Xbee compared to a RFM12. If you need many it is worth the hassle, but for one unit I would choose the comfortable one. http://www.sparkfun.com/commerce/product_info.php?products_id=9473 http://www.sparkfun.com/commerce/product_info.php?products_id=9026 There is even a shield from Lady Ada where you can plugin the module from the first link. Cheers Rubi andras on "Ethernet?" http://talk.jeelabs.net/topic/102/page/2#post-594 Sat, 23 Jan 2010 21:12:03 +0000 andras 594@http://talk.jeelabs.net/ The ethernet shield of nuelectronics ( http://www.nuelectronics.com/estore/index.php?main_page=project_eth ) is based on the ENC28J60. The shield comes with a simplified TCP/IP stack. At looks like UDP en TCP are supported as long as all communications fit in one package. There's a sketch available for a simple web server too. Jean-Claude on "Ethernet?" http://talk.jeelabs.net/topic/102/page/2#post-588 Sat, 23 Jan 2010 17:02:35 +0000 Jean-Claude 588@http://talk.jeelabs.net/ Yes - thx. To be expected, since the WiFi stack is probably fairly complex, maybe even proprietary. User-programmability would be risky. _mattb on "Ethernet?" http://talk.jeelabs.net/topic/102/page/2#post-586 Sat, 23 Jan 2010 15:15:53 +0000 _mattb 586@http://talk.jeelabs.net/ @Jean-Claude - Hm, you can specify sensor/UART interrupts but I do not think that it is much different than the XBee's operation. The WiFly lists GPIOs but documentation is somewhat poor.. Sorry, is that what you were asking?