Wireless large distances

Good morning, I'm building an arduino drone and I do not know how to transmit the signal at a long distance, the important thing for me is to use an arduino as a receiver, as a transmitter I have free choice.
Advice?
We talk about 400 meters around, I need to transmit 6 different signals, not just on and off but at various logical levels.

Buongiorno, sto costruendo un drone con arduino e non so come fare per trasmettere il segnale a grande distanza, l'importante per me è usare un arduino come ricevente, come trasmittente ho libera scelta.
Consigli?
Si parla di 400 metri circa, ho bisogno di trasmettere 6 segnali diversi, non solo on e off ma un segnale di tipo analogico.

AFAIK the nRF24L01+ transceivers will work over that range when there is line-of-sight between the two devices. You should probably use the high powered version with the external antenna for your base station. They are reliable, cheap and easy to use.

...R
Simple nRF24L01+ Tutorial

not just on and off but at various logical levels.

Can you elaborate on that? You can send and receive serial data from digitized analog voltages. And there are only 2 "logical levels", true and false.

about 400 meters

Is that clear line of sight or are there obstructions?

would something like this be of use: https://www.banggood.com/2_4G-2W-Bi-Transceiver-Switches-WiFi-Signal-Amplifier-Module-p-940549.html

2Watt bi-di WIFI amp.

123Splat:
would something like this be of use: https://www.banggood.com/2_4G-2W-Bi-Transceiver-Switches-WiFi-Signal-Amplifier-Module-p-940549.html

2Watt bi-di WIFI amp.
https://www.banggood.com/2_4G-2W-Bi-Transceiver-Switches-WiFi-Signal-Amplifier-Module-p-940549.html

And likley illegal to use in a great deal of countries.

groundfungus:
Can you elaborate on that? You can send and receive serial data from digitized analog voltages. And there are only 2 "logical levels", true and false.Is that clear line of sight or are there obstructions?

Sorry I do not understand what you mean, can you explain it better?

srnet:
And likley illegal to use in a great deal of countries.

Perfectly legal in 2.4GHz band in the US.

123Splat:
Perfectly legal in 2.4GHz band in the US.

Could well be legal in the US, the limit is 4W EIRP as I recall.

Where in the World is the OP based ?