I'm working with Micro Controller Mega-32 (SMD). I'm looking for a Wireless module to transfer and receive the data that I created with the micro.
Could you please guide me ?
You could get to that range in the 900Mhz band with reasonable power.
LS Research makes a couple 900Mhz modules that could do it with the right antenna (directional and high gain).
Just note that usable range can vary a lot based on environment (through a city? through woods? etc).
A Candian Company called Microhard systems makes the ISM 900Mhz band radio you need.
Bit rates go from hundreds of baud to over 1.5 megabaud. Interface to your micro can be serial, USB or ethernet.
we use them on our Robots and they a have a 90-100km range. In a built up area that drops to only 30-40Km or so. If you need to you can run a radio realy an get 2-300 km range.
(Very handy for us as our biggest robot has a 300km range.)
All quite legal in any country, just say where you are and they'll send you the right radios.
we have had lots of success with the this. http://www.digi.com/products/wireless-wired-embedded-solutions/zigbee-rf-modules/point-multipoint-rfmodules/xtend-module.jsp#overview
we use it in our UAVs as a the telemetry modem. It is logic level UART and very easy to interface. We have seen performance with low gain antennas at up to 5 miles. Tested buadrate 9600.
An XBee pro (if they're still making them) might be able to achieve 1.5km with line-of-sight on the highest power rating. I think I saw them rated for 1km, so 1.5km might be a stretch, but it could be worth testing depending on how often you need to transmit.
I think you are out of the range of a "wireless module". I think you are getting into the realm of Long Distance WiFi.
The problem is that you need to go 1.5km. The solution would be good antennas on either end to transmit and receive the signals and a wireless radio to encode/decode the signals to bit/bytes. The actual micro you use should not matter.
There are several Chinese vendors that take ISM-band chips and add a power amplifier (and sometimes LNA) to boost the range.
This is all of dubious legality in the US, of course. I haven't ordered any of these modules to see if they get seized by customs.
An advantage to this approach is that you can prototype with the low power device, and "upgrade" as needed.