Wireless Bridge Test

Remember these units are using license-free WiFi radios - basically this means they are really low power, about 0.1 watt - if that - so you have f**k all squared power margin really.

So every degree off centre you are, the more rubbish is between them, you are losing valuable signal strength and hence throughput, as you are killing the signal to noise ratio of the beam.
 

upnortheast

Member
Livestock Farmer
Location
Northumberland
The spec sheet says "aim in the general direction" of the other unit

Had issues with speed when ours was 1st installed. this was the reply I got from the suppliers` support boys -

I'd expect better than 6meg. What 'modes' are the two units running in? My guess, since you've got a 202EXT at one end is you have the 202EXT in AP mode? Is this because you want the 202EXT to also cover a yard or area? AP mode isn't very fast but, saying that, 6meg is still low. WDS Bridge mode (at both ends) is faster but won't allow local clients to connect.
Try changing to 40meg channel width and also channel 8. Also change distance to the correct figure.
 

aidan

Member
Location
Ireland
The spec sheet says "aim in the general direction" of the other unit

Had issues with speed when ours was 1st installed. this was the reply I got from the suppliers` support boys -

I'd expect better than 6meg. What 'modes' are the two units running in? My guess, since you've got a 202EXT at one end is you have the 202EXT in AP mode? Is this because you want the 202EXT to also cover a yard or area? AP mode isn't very fast but, saying that, 6meg is still low. WDS Bridge mode (at both ends) is faster but won't allow local clients to connect.
Try changing to 40meg channel width and also channel 8. Also change distance to the correct figure.

Both in WDS bridge setup as per this document

https://www.solwise.co.uk/downloads/files/engenius-wds-bridge-setup-guide.pdf

I am running at 40meg, and channel 8 and the distance is at 1km the minimum I can set it up to.
 
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Personally I'd get the station out of the kitchen area - too much potential for spurious RF electrical noise and crap affecting the WiFi reception.

Move to an external position as high as practically possible, solidly mounted as possible. Do the same at the other end too. With clear line of site there's no reason why these units won't do 150 Mbps + @ 200 metres.
 

aidan

Member
Location
Ireland
Are you sure this is the speed across your wireless link or your broadband speed ?

its the wireless link speed, with engenius stuff you go into the diagnostics menu and input the IP address of the transmitter at the other end and press test or something like that and it does a speed test.

Im 100% sure on this as was running it without any connection to the router, was plugged in directly to the transmitter

What speed does your engenius stuff run at if you dont mind me asking, i didn't know that the engenius transmitters had this feature until this morning

I think it is possibly the difference in elevation is my problem, I would have 30ft of a differece in elevation between the two so I need to point the high one downwards a bit.

I will try again next weekend..........
 

aidan

Member
Location
Ireland
Just checked, it`s showing around 30mb sec

ha, my next step is to get someone adjust the angle of the high transmitter while I do the speed test, will see can I get an improvement, the v minor adjustment I made today got me to 22-25mb

My Hikvision software tells me the camera is transmitting 2.9mBit per second
 
the v minor adjustment I made today got me to 22-25m
It’s all about the ‘angle of the dangle’ as they say ;)

Wireless comms, even on baby links like this, can be a pain if you’ve never really set them up before, but there are some golden rules when it comes to radio communications.

1. Maintain a clear line of site

2. The higher above ground the better

3. Accurate aiming from ‘dish’ to ‘dish’

This is all to do with radio signal propagation, loss and minimising noise. If you look at antennas on radio towers they embody all these principles.
 

RhysT

Member
Livestock Farmer
Location
Swansea
Sorry to hijack.
Wanting a kit to send broadband signal across yard so we can set up cctv in our stables.
Clear line of sight approx 40m across a yard from house to end of barn.
Can you guys recommend the kit that id need.
Preferably for a numpty like me!!
 

aidan

Member
Location
Ireland
Sorry to hijack.
Wanting a kit to send broadband signal across yard so we can set up cctv in our stables.
Clear line of sight approx 40m across a yard from house to end of barn.
Can you guys recommend the kit that id need.
Preferably for a numpty like me!!

YEs it can be done v easily, give anyone selling calving camera a shout and they will sort it out for you
 

aidan

Member
Location
Ireland
It’s all about the ‘angle of the dangle’ as they say ;)

Wireless comms, even on baby links like this, can be a pain if you’ve never really set them up before, but there are some golden rules when it comes to radio communications.

1. Maintain a clear line of site

2. The higher above ground the better

3. Accurate aiming from ‘dish’ to ‘dish’

This is all to do with radio signal propagation, loss and minimising noise. If you look at antennas on radio towers they embody all these principles.


Still having problems, my problem is
•Data Transmission is not consistent and pauses and stutters, regardless of weather conditions or day or night. It can vary between 25MBs and 0.5MBs. (Engenius Speed Test Values)
•Even though Speed test values vary, RSSI values as read from laptop plugged into router stay v v v consistent at -58dBM and -33dBM.

Is it a bit strange the RSSI values vary at each end, should these be the same.

See photos attached and file attached showing layout, any ideas
layout.jpg
photo.jpg
 

aidan

Member
Location
Ireland
I also am quite satisfied I dont have any other wifi signals interfering, tested using the mobile phone trying to pick up other networks.

Is there any piece of software that is good for analysing noise on the system or anything like that.

Could the metal roof as per the photo somehow be causing interference, I cant see anything in the documentation that indicates it could or couldn't
 

upnortheast

Member
Livestock Farmer
Location
Northumberland
Got a phone app called WIFi analyser which shows all signals. with chanels used
There is a scan funtion in our Engenius unit which does the same

Have you tried setting to different channels & changing between 20mhz & 40 mhz
 

aidan

Member
Location
Ireland
Got a phone app called WIFi analyser which shows all signals. with chanels used
There is a scan funtion in our Engenius unit which does the same

Have you tried setting to different channels & changing between 20mhz & 40 mhz

tried all this and no improvement!

Does that app show SNR rates or Signal to Noise Rates
 
thanks, in such a situation how do you usually proceed, is it raise it up and see what happens or is it move it to the gable end
It needs to be away from the reflective surface of the metal roof. The roof will be back scattering the radiation everywhere so the units will have a sh!t ton (that’s a techical term ;)) of RF noise to deal with.

Much better if you can to move the unit somewhere where the roof is not in the propagation path of the link. Maybe give the gable ends a go.

Remember the metal of the roof will act like a shield / mirror / reflector / noise generator all in one and at once.
 

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