Thursday, 11 January 2018

BT Infinity Finally!

I have finally received super-fast broadband and it was enabled on Wednesday morning around 10am. I never noticed till a day later when I looked at my MRTG speed graphs and noticed the upload had risen from 1Mbps to 13Mbps. The download speed stayed at the usual just below 15Mbps but this is because the MRTG graphing only uses the last valid number when in fact the reading actually goes off-scale. I re-tuned the Download speed graph value to 60Mbps and it looks sensible now.

So my surmising what the AIO pavement spray painting meant ie signifying the installation of a all-in-one FTTC cabinet was correct. This post may also give someone whose internet comes from a far away cabinet the comfort that they may eventually get a cabinet closer to their home like in my case , I was originally connected to a cabinet ~1.5km away then moved to a new cabinet that is only 600m away.



Below shows the now stablised modem negotiated speeds , you can see a little step increase in downstream speed about midway on the graph and this may be down to a period of line speed training.


I have also been graphing actual measured download/upload speeds to various servers around the country , chosen at random every fifteen minutes or so. On the graph below you can see a baseline roughly between 30Mbps and 35Mbps for download speed , the upload speed is around 8Mbps most of the time.

Wednesday, 18 October 2017

File resolv.conf changed on reboot

The file /etc/resolv.conf was being reset and losing the correct nameserver on my Raspberry Pi after a reboot. The unfriendly way of fixing this was to set the immutable flag of the file using :-
sudo chattr -i /etc/resolv.conf 
It worked but I know this isn't the correct way to do it , but hey-ho life's too short....

Tuesday, 26 September 2017

Broken Ubuntu Mate Desktop

I had Ubuntu 16.04 LTS installed as a guest on a Windows 10 OS. The VM was shutdown uncleanly and after that its Mate Desktop wouldn't run properly. I re-installed the MATE Desktop using the following command.
apt-get install ubuntu-mate-desktop --reinstall 
After the re-install it worked fine with no problems. I'll remember to shutdown the VM properly next time.

Friday, 4 August 2017

Virtualbox USB Problems

Using a PC running Ubuntu with Virtualbox using Windows 10 as the guest I found I could not add usb devices using the add new usb filter. After a bit of searching I found information about the issue here.
I had to run the following command to get it to work , remember to log out and log back in after running the command.
sudo adduser $USER vboxusers
After that the add USB devices filter worked fine.

Friday, 30 June 2017

iAQ-CORE_C I²C Problems

Problems with the iAQ-CORE-C Indoor Air Quality Sensor Module. I built the module onto a breadboard pcb and while testing I found that it would not work. I couldn't detect the device on the I²C bus of the Raspberry Pi I was using. Although I could use other devices on the bus without a problem , I found a lot of forums with entries about clock stretching causing problems for the Broadcom SoC I²C bus. I even tested it on an Arduino and no data from the device was detected. After a long time checking and testing the breadboard I came across an error in my wiring that turned out to be the problem. The wire for the SDA Pin 4 was connected to NC Pin 1 on its way off the board to the Raspberry Pi. There is no mention in the manufacturers data sheet not to connect to this pin it even says not connected. I spent a fair amount of time debugging this fault and eventually got it working

Wednesday, 15 March 2017

BT Infinity in a Closer Cabinet

I have BT infinity but this gives about 15Mbps download 1Mbps upload , not very good really. The reason is I am about 1.5km from the Cabinet providing my FTTC so the attenuation in the copper and increased noise pickup causes the drop in speed. I however noticed some contractor white spray paint symbols on the pavement about 200 metres from my house with the letters A.I.O and a box shape , see my photo below.I think the AIO stands for an All In One Cabinet that BT sometimes install in outlying areas serving a smaller number of subscribers than is typical.
The main BT cable bundle that serves my house is in the duct marked BT in the picture below , so I am wondering/hoping that I will get moved from the far away one to this A.I.O cabinet? This would mean I could get true infinity speeds so I'll just have to cross my fingers and hope that this will happen. Update , got superfast broadband.

Wednesday, 25 January 2017

Getting ESPlorer to Run on Mint 17.4

I was having problems getting ESPlorer to run on my Linux machine , this to program an ESP8266 Wemos D1 Mini Clone with Lua , html content and an HA Bridge running on a Raspberry Pi for use with an Amazon Echo to control some RF remote control mains sockets. The error displayed from the console was  :-
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007fe595a40009, pid=11774, tid=11803
#
# JRE version: OpenJDK Runtime Environment (9.0) (build 9-internal+0-2016-04-14-195246.buildd.src)
# Java VM: OpenJDK 64-Bit Server VM (9-internal+0-2016-04-14-195246.buildd.src, mixed mode, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# C  [libjava.so+0x1d009]  JNU_GetEnv+0x19
I used the command :-
sudo update-alternatives --config java  
and had the choice of either java-8-openjdk-amd64 or java-9-openjdk-amd64 on my machine. The default was java-9-openjdk-amd64 so I selected java-8-openjdk-amd64 and ESPlorer then worked without issue , I hope this helps someone in the same position.

BT Infinity Finally!

I have finally received super-fast broadband and it was enabled on Wednesday morning around 10am. I never noticed till a day later when I lo...