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[Reply #15 on:]

Hi, the nRF24L01 type modules work well and and low cost. Also have optional Power amplifier / Low Noise Preamp

How-To on the http://ArduinoInfo.Info WIKI here: http://arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowTo
(also links to ManiacBug's work)

Some modules here: http://goo.gl/50h5H


DISCLAIMER: Mentioned stuff from my own shop...

[Reply #16 on:]

Do you have a better, cheap & more efficient idea ? remember i will need to use Virtual wire in these nodes and will need to program each node to have its own unique ID using EEPROM.

I would use a transceiver instead so that you can ensure transmission with an acknowledge packet. Also, take a look at the JeeNode for a good example of a cheap wireless system with good software and community support. I use their libraries with a device similar to this one: http://arduino.cc/forum/index.php/topic,104203.0.html

[Reply #17 on:]

I like the JeeNodes but they use the RFM12B transcievers which are more expensive ~$5-$8.  You can get the nRF24L01 transcievers for ~$1-$2 off of ebay, and with the rf24 library they seem to work really well.  The big question is what frequency you want to use 915MHz or 2.4GHz.

[Reply #18 on:]

I like the JeeNodes but they use the RFM12B transcievers which are more expensive ~$5-$8.  You can get the nRF24L01 transcievers for ~$1-$2 off of ebay, and with the rf24 library they seem to work really well.  The big question is what frequency you want to use 915MHz or 2.4GHz.

Never been a fan of the form factor, but the fact that it's cheaper is nice. I haven't gotten the chance to test if the libraries work for the ATTinys.

[Reply #19 on:]

Guys really thanks for your valuable information and your sharing!

Am in love with the nRF24L01 chip, it is VERY cheap and seems reliable and been used in many other projects.
The only odd thing about it is that there is no much information about connecting its pins with Arduino Nano, Uno, Mega, atTiny
I can see It needs 8 wires to be connected to Arduino. but i guess being a member in this lovely community will help me much to figure it out.

In this case I will leave the idea of using 315 MHz connection and will go with the 2.4, I wanted to use the 315 MHZ to be able to use the cheap Chinese remote controls with it, but in this case I can make cheaper remote controls using the nRF24L01 chip or using AtTiny micro controller.

This chip will totally help me reduce the node price, would be great if you can share with me step by step connection to Arduino.

Thx again, you guys are the best!

[Reply #20 on:]

You only need 5 wires going to the MCU, most people never use the IRQ pin and then you have Vin and GND.  That leaves MOSI, MISO, SCK, CE, and CSN which you can connect to your MCU.  Good luck with your project.

[Reply #21 on:]

I can see It needs 8 wires to be connected to Arduino. but i guess being a member in this lovely community will help me much to figure it out.

All you really need is Google:

http://arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowTo