Hello, I am working on a project and I need a cheap and effective wireless commucation module. I have 5-10 sensors that measures values and I want to send that measured data to one receiver. I have used xbee but it is too expensive. Is there any other way to send data from multiple transmitters to one receiver?
Thank you
Hi,
http://playground.arduino.cc/InterfacingWithHardware/Nrf24L01
Stacks of tutorials and example coding available as well as a model with an external antenna.
Tom.... 
Thank you Tom.
Is it suitable for buiding a sensor network with one receiver and multi transmitter?
fatopato:
Thank you Tom.
Is it suitable for buiding a sensor network with one receiver and multi transmitter?
Yes, if you arrange things so that the various "slave" transmitters only speak when requested by the "master" receiver.
If you give each slave a unique number then the master can say "come in number 1 your time is up" or the equivalent.
...R