I am exploring the possibility of setting up a dedicated point to point wireless link that would connect 2 ethernet lans together. eg, siteA has broadband ethernet connection to modem, in turn to the WAN. Radio at siteA connects to ethernet, and has wireless link to radio at siteB, which interfaces to ethernet at siteB.
Easily done with wifi, however I need to communicate long distances (> 1 mile) with the possibility of obstacles (trees,) so I would like to set up a ~900 MHz or 433 Mhz link. Sacrificing speed is understood and acceptable.
Without having to completely build this from scratch, I've looked for modules which might be useful. What I seem to need is something somewhere in between an ESP8266 and an RFM22B.
The ESP8266 seems like it would be the best bet, offering 802.11b and above, were it not for the fact that it is only 2.4 GHz :-/. The RFM22B works on 433 MHz and ~900 MHz, but max data rate is 250 kbps.
As I'm only looking for a bare-bones link (no games, no movies, slow connection acceptable), I could do with something around 2 or 3 Mbps.
Is there something out there that would be like the ESP8266 but does 433 and/or ~900 MHz?
Or something like the RFM22B but faster?
Can anyone offer their experience or opinion regarding setting something like this up, and especially interfacing with ethernet? As it is a dedicated point-to-point system, I am not limited to any particular protocol on the wireless side of things.
"Easily done with wifi, however I need to communicate long distances (> 1 mile) with the possibility of obstacles (trees,) so I would like to set up a ~900 MHz or 433 Mhz link. Sacrificing speed is understood and acceptable."
If I needed something like that, I would try two wireless routers in the bridge mode with, as high up as possible, with directional antennas. If 2 or 3 Mbps at that range was easy, everybody would probably have wifi bots with video out roaming around.
zoomkat:
If I needed something like that, I would try two wireless routers in the bridge mode with, as high up as possible, with directional antennas.
srnet:
At UHF frequencies there is rarely the bandwidth available for legal high speed links.
That's why the 2.4Ghz and 5.8Ghz WiFi spectrum is mostly used for such things with appropriate antennas etc.
900 MHz wireless internet is nothing radical, see Ubiquiti M900 series devices which operate at 902MHz - 928MHz and advertise >20 Mbps data rates (which is more than adequate for streaming youtube videos.) Long-distant wireless internet solutions may be a niche but they are needed in certain situations. I am trying to set up something similar in a DIY fashion, where I can learn and experiment. So I am looking for help in trying to set up a 900 MHz link.
KevinJones:
see Ubiquiti M900 series devices which operate at 902MHz - 928MHz and advertise >20 Mbps data rates (which is more than adequate for streaming youtube videos.
You would need to check whether those type of devices are legal in your part of the world, which you did not mention. Not legal in the UK and I suspect most of Europe.
2.4Ghz and 5.8Ghz WiFi is however almost universally permitted.
"900 MHz wireless internet is nothing radical, see Ubiquiti M900 series devices which operate at 902MHz - 928MHz and advertise >20 Mbps data rates (which is more than adequate for streaming youtube videos.) "
For as long as there has been ethernet, there have been devices to connect campus buildings together. You just need the proper antennas and the modems at each end. Not hobby type devices, either. Google for "campus network".