Adrian,
If you have line of site or you can make a LOS shot a pair of Ubquiti 5GHz radios configured as an Ethernet bridge.? 500m should no problem.? I suggest 5GHz if it is available in your country because 2.4GHz is an RF cesspool with only 3 channels due to overlap here in the US, with billions and billions of IOT on that spectrum.
I use them all the time on camera systems and even remote my HF station, IRLP & DMR repeater on the same link.? There are many vendors of similar radios but these have proven to be very reliable.? I have one link that has been running over 10 years and I have not done anything except upgrade the firmware every so often.
Good luck!
K1IMD
