I would like to get the maximum range between 2 arduinos where one is always transmitting, the other receiving.
I have one of these on the transmitter
Should I have the same antenna unit on the receiver or will one of these be good enough?
They say the range is 1000m for the antenna version, but I'm guessing you can't have that unit on both and get 2000m range.
Thanks in advance.
The best aerial possible if you can, so if you can have an aerial on both units then go ahead
Those units are transceivers, and although you are using them as a TX and one end and RX at the other end, they talk to each other as TX/RX pairs, so both need an aerial to ensure valid data transmission.
I suspect this is a case for experiment. I would be surprised if the marketers have understated the capability.
You can get directional WiFi antennnas and I wonder if you could connect that nRF24 unit to them - WiFi uses the same frequency.
From what little I know of 2.4Ghz comms it is very easy to dissipate all the radio power in a poor connection to the antenna.
They say the range is 1000m for the antenna version
The assumption is that the receiver will have the same kind of antenna.
That range, though, is the farthest that any device, with any kind of antenna, will be able to detect the signal before it has decayed too far.
No, using the same kind of antenna on both ends will not double the range.
but I'm guessing you can't have that unit on both and get 2000m range.
Stanley Seow in KL did some work on these a couple of years ago. I recall that only one antenna version is merited.