You just can’t trust the BBC.

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Screen Shot 2014-10-02 at 09.39.12Two headlines, both from the BBC News website today, both published today, both conflicting. One reads “UK Universities slip down rankings” and the other reads “Universities hold world rankings”.

In fact both are true, because the BBC sees “England” as being the “UK” and demotes Scotland. The truth is that overall English universities have slipped down the world rankings but Scottish universities have held their place. In fact, despite the headline saying the universities position was “held” they have in fact rose up the ranking. Surely this is anti-scottish bias?

Screen Shot 2014-10-02 at 09.39.00Shouldn’t the BBC be more careful about using gimmicky headlines to draw people into reading their news stories? The BBC News anchors used to be the epitome of good grammar, correct English and decent journalism. Now there is very little journalism on BBC News, it is mainly just “reporting” and they often use misleading headlines to draw you into a story, or to promote a BBC TV Programe.

 

Click the graphics for full versions.

 

Hong Kong trip postponed.

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I was supposed to travel to Hong Kong on Saturday 11th October to attend HKTDC, but I had to pull out due to a foot injury. Now it looks as though that might have been a provident decision, given the current unrest in the area.  Continue reading

Sep 22

Stay safe from high quality phishing email scams.

Today I received an email on my BT Internet email account which looked bona fide, but it was a phishing scam. Here I describe how to spot the few clues, to make sure you don’t get caught out. Continue reading

Aug 18

BT HomeHub 5 has issues with mDNS/Bonjour

I recently upgraded from the BT HomeHub 3 to their latest offering, the BT Home Hub 5.

However immediately on replacing the old router with the new one I started having problems with my networked printers. I have a pair of HP OfficeJet 7500A printers, attached to my home network. Once I had upgraded to the Home Hub 5, I could see the printers on the network, but I could not print to them.

To cut a long story short, I did a bit of digging about with Wireshark and Bonjour Browser and discovered the issue. The printers advertise themselves on the network using mDNS (also known as Bonjour in Apple circles). With mDNS when a computer wishes to find a provider of a certain service, such as printing, it sends out a service discovery packet on the network, and all the devices which provide that service reply with their details. This is known as ‘service discovery.’ In the case of these printers the service is known as “_ipp.tcp” (Internet Printing Protocol).

The problem that I’ve been seeing with the HH5 is that this service request and discovery process does not work for certain devices – but only when the computer issues the request via the HH5’s LAN interface (ie, the wired ethernet ports). If the computer is connected to the home hub using WiFi then the service discovery process works properly.

mDNS and Bonjour work by sending the service discovery packets to a well known ‘multicast’ address: 224.0.0.251 – It looks to me like the HH5 is not passing these requests on the LAN interface correctly. Yet it does work on the WiFi interface.

It could be the size of the TXT record that is at the heart of the problem, because these printers return quite a large TXT packet, but I have not been able to verify that. Even so, it works fine over the WiFi interface, so it should work on the LAN interface.

Finally, if I go back to using my old BT Home Hub 3, then it all works fine on both the LAN and the WiFi interfaces, leading me to deduce that there is an issue with mDNS/Bonjour being used with HH5.

I’ve contacted BT and sent them packet captures and all kinds of data, but they don’t respond. It would appear as through they simply do not care about this issue.

Jul 25

The skies are busy

While traveling by air yesterday, it got me wondering how busy our skies are. The answer might surprise you. The following image shows actual flights in progress over Europe at 13:10 BST today. (Click image for a larger view).

Flights Over EuropeAccording to data from FlightRadar24 there were 8830 Flights in progress over world, 2920 of them over europe. This only includes flights on which there was data available, the real figure may even be slightly higher.

 

Jul 02

Intel Galileo 2nd Generation board – first pics.

Here is a picture of the new Generation 2 Intel Galileo board.

This pic was taken from the Galileo Getting Started Guide available here.

Click the image for a larger view.

Screen Shot 2014-07-02 at 10.24.27

Jul 01

Intel® Galileo Gen2 Product Brief

Some details are staring to emerge about the new generation of Intel Galileo boards.

Follow this link : Intel® Galileo Gen2 Product Brief | Intel Communities.

Jun 16

Reading 1-Wire iButtons using Cypress PSoC 3 and 5/5LP

Previously I posted about using a standard UART to read and write to 1-Wire devices. In this post I look at how to read and write to these devices using Cypress PSoC devices. Continue reading

Jun 09

LED Matrix built and working

I’ve assembled and coded up the LED Matrix shield that I designed. It’s running on an Intel Galieo, but should also be compatible with other Arduino UNO Compatible boards. Assembly pictures and video demos are included.

Continue reading