Want Guidance for my Arduino Networking

Hello Dears ,

I want to make a wireless connection projects that have a star network. Or, Point to Multi-Point.

With Arduino I want to make it, for agricultural purposes, for a distance about of 3500 meters.

I have 20 slave node and 1 Master.

With regard to the question of what kind of modules do you recommend?

is suitable NRF24L01 module for this project??

Thanks for your Help.

Probably not. NRF24s are not that much different from Bluetooth. The high power ones with a stick antenna are good for about a kilometre. I think you need something like XBee s3b.