Hey. I need to communicate between 2 arduinos , ground and air.
I've been researching for some time and i guess RF is what will suit me, and everywhere i go, i see diferent claims of distances that a pair of modules does. I know it depends on a lot of factors, frequency , objects , power , antenas....
I would be happy with 1km , very happy with 2km and so on. I also have seen that zigbee/xbee are a good deal , but buying 2 modules + 2 shields may got a bit expensive.
What could you advise me , and if you have tested , what range can it get ?
RFM69, over 1Km line of sight using the high power version and small whip or 1/4 wire antenna.
If you have line of sight you can easily double that with 7dBi directional yagi antennas, but those are quite big and you need to have it aimed to the other node all the time.
Some other projects/links reporting experience with the same radio:
The place where the i intend to comunicate doesnt have tall buildings or anything like that, and as i mencioned , its ground - air most of the times it wont have anything blocking line of sight.
If i want to go a litle more distant , the objects that i will get are trees and a litle elevation "mountains".
This Youtube video shows tests with an nRF24 transceiver IIRC they had communication over a range of 1km.
I reckon if you are just using wireless equipment that does not require a licence you will have to do some experimentation to find what range you can rely on.
If the wireless system will be controlling a flying machine and if the machine will crash without a reliable signal I suspect 1km would be stretching things. It would be very different if the machine can fly autonomously and can return to base if it loses the signal. Or if the wireless was being used for something unconnected with the control system - for example to relay data.
If the wireless system will be controlling a flying machine and if the machine will crash without a reliable signal I suspect 1km would be stretching things.
In the US, any unmanned aerial vehicle must be visible to the operator at all times. Personally, I couldn't see anything smaller than a 747 at 2km. Using an Arduino in the process of flying a 747 somehow escapes me.
I hope that flying an aircraft using an Arduino is not what OP plans.
PaulS:
In the US, any unmanned aerial vehicle must be visible to the operator at all times. Personally, I couldn't see anything smaller than a 747 at 2km. Using an Arduino in the process of flying a 747 somehow escapes me.
I hope that flying an aircraft using an Arduino is not what OP plans.
I dont live in the US but the law is quite the same.
I am obviously concerned about security. First i will make the tests range on the ground, then calculate distance i can fly at a certain altitude ( phythagoras ). If arduino on air senses singal loss, it will return to space within range. I will not fly over crouded ares, the place have almost 0 people and houses.
Robin2:
This Youtube video shows tests with an nRF24 transceiver IIRC they had communication over a range of 1km.
I reckon if you are just using wireless equipment that does not require a licence you will have to do some experimentation to find what range you can rely on.
If the wireless system will be controlling a flying machine and if the machine will crash without a reliable signal I suspect 1km would be stretching things. It would be very different if the machine can fly autonomously and can return to base if it loses the signal. Or if the wireless was being used for something unconnected with the control system - for example to relay data.
...R
This guy as a video where he tries to go 10km with those nrf , of course perfect conditions , and as said in the coments , he has the receiver attach to the roof of the car and the car body acts like a plate i guess.
Sorry, I misunderstood. When you said "He also attach an antena to the Tx" I was concerned that you might have thought that it was possible to add an antenna to the low power version.
Looking forward to reading your results.
...R
PS. I suspect some of the regular Radio Control systems for model planes use nRF24 transceivers or the similar (but not interchangeable) Cypress equivalent.
Robin2:
...R
PS. I suspect some of the regular Radio Control systems for model planes use nRF24 transceivers or the similar (but not interchangeable) Cypress equivalent.
