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Bridge Installed

A project log for Einstein-Rosen Bridge (WiFi)

An encrypted WiFi bridge from my house to my mother-in-laws house across the back court so she can watch Netflix

robhefforobheffo 07/19/2015 at 23:410 Comments

Having completed the software installation (Part 2 of my configuration log is pending) I spent this afternoon installing the boxes in their final locations.

My box was installed on the roof of my garage as the existing TV antenna mast was too far away from my garage where my switch gear is located.

The antenna was aimed by eye at the TV antenna mast at my mother-in-law's house, the spread on the signal will easily take care of any misalignment. The only issue I faced was my next door neighbour's shed and a bottle brush tree in my mother-in-law's neighbour's yard

After installing the second box and aiming it back at my garage roof, I connected my phone to my mother-in-law's access point inside the house, opened a terminal and was able to ping across the bridge with no issues.

Trying to ping the internet was failing but a quick traceroute showed the packets were stopping at my cisco router. A quick tweak to the access lists allowing my mother-in-law's subnet and the issue was resolved.

The link speed isn't the greatest but given the obstacles in the way it's probably not unexpected. The Link Quality varies and the Bit Rate tends to shift back and forwards between 18Mb/s and 24Mb/s. I would have liked a higher speed, but it is still enough to saturate my internet link.

I do need to do some tuning with OpenVPN to try and work on the speed of the encryption. I was only getting about 3.5MB/s to 4MB/s transfer speeds and it was maxing out the Pi 1's CPU. I will be doing some monitoring of the CPU temperature to see if a mild overclock is possible, it was a frosty morning this morning and the Pi 1 was running about 30°C where my Pi 2 was only 18.5°C (for reference, the standing water pools outside were frozen)

Finally I was able to install a Chromecast on my mother-in-law's TV and set her phone up with the Chromecast and Netflix apps, she was able to watch some legal TV goodness with no stuttering or quality issues so over-all I would call the exercise a success.

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