Unless you are a license holder, you would, i fear, be in the hands of Police in no time you start transmitting. why such long distances and how you plan not to interfere with others or get interfered by others.
Since you are going to transmit data only only, therefore I think that a simple FM transmitter can do the trick.
Check the below website, there are several of FM transmitter those can cover the required range.
All you have to do is to encode your data before applying it the transmitter.
**broken link removed**
Hope you are refering TLP modules working on 433 Mhz. These will have maximum range of 100 Meters in open space. For transmitting for more distance, you need more power and for that license from Wireless planning and co-ordination wing (WPC) Dept of Telecommunication, Govt of India.Delhi. Good luck
Hope you are refering TLP modules working on 433 Mhz. These will have maximum range of 100 Meters in open space. For transmitting for more distance, you need more power and for that license from Wireless planning and co-ordination wing (WPC) Dept of Telecommunication, Govt of India.Delhi. Good luck
I am of the opinion that the same signal instead of broadcasting, if could be beamed, it will cover longer distance. Of course, one has to design small directional antennae for Tx and Rx both