http://www.mrroot.net What else would it be? Mon, 27 Dec 2010 05:49:16 +0000 hourly 1 http://wordpress.org/?v=3.0.4 http://www.mrroot.net/software/comment-page-1/#comment-355 This and That » Blog Archive » Wireless is GO! - What else would it be? Fri, 03 Sep 2010 15:56:31 +0000 http://www.mrroot.net/?page_id=262#comment-355 [...] I got my wireless link online several weeks ago and am just now posting.  Lame, I know, but after it was up I immediately set about working it towards something useful.  I’ll save that for another post; right now I want to detail what was involved in getting the RF link up. First off, the hardware: two arduinos and two Nordic radios. I used the Arduino USB boards, one RP-SMA board and one chip antenna board.  Why two different RF configurations?  To test range, sensitivity and see what they look like.  Anyhow, the Nordic chips on these boards ( nRF24L01+ ) interface via the Serial Peripheral Interface bus standard, or SPI for short.  SPI is a fairly simple protocol, but the timings can get tricky.  Fortunately, the Arduino has an SPI interface built in, so all we need to do is download and install the SPI library from the Arduino Playground.  Better still, someone sat down and wrote a small interface library for the Nordic chips which encompasses a subset ( the important ones ) of the command set!  Find details and download Mirf.zip here. Update: I updated and fixed some things with the Mirf library and have released it on the site. Check out the “Software” tab at the top, or go here. [...] [...] I got my wireless link online several weeks ago and am just now posting.  Lame, I know, but after it was up I immediately set about working it towards something useful.  I’ll save that for another post; right now I want to detail what was involved in getting the RF link up. First off, the hardware: two arduinos and two Nordic radios. I used the Arduino USB boards, one RP-SMA board and one chip antenna board.  Why two different RF configurations?  To test range, sensitivity and see what they look like.  Anyhow, the Nordic chips on these boards ( nRF24L01+ ) interface via the Serial Peripheral Interface bus standard, or SPI for short.  SPI is a fairly simple protocol, but the timings can get tricky.  Fortunately, the Arduino has an SPI interface built in, so all we need to do is download and install the SPI library from the Arduino Playground.  Better still, someone sat down and wrote a small interface library for the Nordic chips which encompasses a subset ( the important ones ) of the command set!  Find details and download Mirf.zip here. Update: I updated and fixed some things with the Mirf library and have released it on the site. Check out the “Software” tab at the top, or go here. [...]

]]> http://www.mrroot.net/software/comment-page-1/#comment-17 This and That » Blog Archive » More software! This time some fixes to the Mirf library - What else would it be? Fri, 13 Nov 2009 04:10:42 +0000 http://www.mrroot.net/?page_id=262#comment-17 [...] Software [...] [...] Software [...]

]]> http://www.mrroot.net/software/comment-page-1/#comment-16 This and That » Blog Archive » Software! - What else would it be? Mon, 09 Nov 2009 21:41:50 +0000 http://www.mrroot.net/?page_id=262#comment-16 [...] Software [...] [...] Software [...]

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