what multihop possible with LoRa? If it possible, how it works? I really need help with this 
regards
Gomgom
Hi,
Welcome to the forum.
Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html .
How far do you want communicate with the Lora system?
Tom.... 
If you 'really need help' then you really need to give the forum some idea of what it is you are trying to achieve or what the project is.