Comments on: Arduino goes wireless

By: nugroho

nugroho — Sun, 05 Jun 2011 11:12:53 +0000

nrf2401A

can I change the pin connection?
DR1 -> 2 to pin Digital 10
CE -> 3 to pin Digital 11
CS -> 4 to pin Digital 12
CLK -> 5 to pin Digital 13
DAT -> 6 to pin Analog 0

thanks,
best regards,
nugroho budi.

P.S.:
sorry for my bad english.

By: PDQ Web Consulting Services » Wireless Arduino

PDQ Web Consulting Services » Wireless Arduino — Tue, 27 Jul 2010 04:36:45 +0000

[...] http://labs.ideo.com/2009/05/08/arduino-goes-wireless/ [...]

By: pjwerneck

pjwerneck — Fri, 22 Jan 2010 03:31:22 +0000

I’ve been using the nrf2401 and your library for some time, but now I have to use it with the Arduino Mega but I’m not having much luck in getting it to work. I try the same code with absolutely no differences, but it looks like something must be changed. Any ideas?

By: calmconviction

calmconviction — Wed, 24 Jun 2009 05:07:05 +0000

@vB, Jesse
This library will only work with nrf2401 and not the nrf24l01 or even the nrf2402.

By: Jesse

Jesse — Mon, 25 May 2009 23:34:15 +0000

@vB: I would be very surprised if the library works with the nrf24L01 out of the box, it was not designed with this hardware in mind.

Xbee is an awesome alternative, and allows one to use the built in Serial library for a more familiar approach to communications. The biggest factor in choosing this hardware over Xbee was physical size – not only is the Xbee module considerably heavier and larger, but in order to use it with Arduino you need additional circuitry! Adafruit’s breakout is pretty small: http://www.adafruit.com/index.php?main_page=product_info&products_id=126
but when your project turns aerial – the weight savings could be just the ticket…

By: Gregor van Egdom

Gregor van Egdom — Mon, 25 May 2009 22:31:30 +0000

The Xbee’s are indeed a nice alternative. Both seem to be about the same price, and the xbee’s have a broader user group and support…
Is there any reason to use the nRF2401 over xbee’s?

By: Jonathan Moore

Jonathan Moore — Sat, 23 May 2009 04:07:07 +0000

you should check out xbee it is reasonably priced and you can even reprogram the arduino wirelessly with it. We have this set up on our big LED board at noisebridge. You can check it out at Maker Fair where we will have a table.

By: vB

vB — Wed, 20 May 2009 06:32:11 +0000

Hi Jess, thanx a ton for this library, i intend to use it with nRF24L01 module. COuld you kindly tell me is it necessary to connect “CS” to pin 4, as i’ll be connecting DR to pin 2 (need to use RCV int) and I also need atleast one hardware interrupt for certain other features in my project. Can I define some other digital pin for “CS”? if yes are there any preferences or can it any other pin?

thank you for your time and effort

By: Jesse

Jesse — Mon, 11 May 2009 20:27:32 +0000

Noise in a typical indoor environment is very strong in the 2.4GHz range. The hardware offers a 16 bit CRC and 40 bit addressing which the library makes full use of, but even so you will (very) occasionally drop a packet. For applications demanding accurate data 100% of the time, you would want to implement a positive acknowledgment with retransmission scheme similar to TCP on top of this library. I believe newer versions of Nordic equipment like the nRF24L01 can do this automatically, but I have not experimented myself. Range depends on a lot of different factors – http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=48.

By: Gregor van Egdom

Gregor van Egdom — Mon, 11 May 2009 09:30:06 +0000

Great work again. I’ve been toying around with a cheap unidirectional module but could only get it to work at 300bps (not K!)…
What are your experiences with these transceivers regarding range and noise? Will the chip check if the packets came through allright?