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Comment Re:I wish! (Score 1) 158

I'm working on a WiFi Keyboard and Mouse interface, using a Cactus Micro v2 board. This has an atmega32u4, which appears to the PC as a keyboard and mouse, as well as an ESP8266 Wifi microcontroller, which connects to your home wifi and exposes a TCP service to accept K/M events. Connect to it using your phone/tablet, send keystrokes/mouse movements to your PC, view the results via an HDMI over Ethernet extender.

Still in progress, but sounds like it might address your problem.

Comment Re:It's not a networking issue. (Score 1) 384

Indeed, my solution would have involved something like a TP-Link WR703N, running OpenWRT, powered from a USB battery pack. (I'm assuming that each of the pumps is some distance from the next, and you don't want to have Ethernet cables running across the forecourt. The battery pack is optional, I guess you may also have power available at each pump). Configure each mini router with an appropriate IP address on the Ethernet port, and then do Source NAT from the Wifi to that IP address when talking to the pump. Configure the WiFi interface to connect to an AP that you set up centrally, that your laptop will also be connected to. This takes care of the issue of simultaneous connectivity to each pump.

As far as software goes, it sounds like a virtual machine for each is a requirement, so that they can run independently of each other. This *might* end up being the trickiest part, depending on how much configurability you have in the application that actually does the firmware updates.

* If you can specify the IP address of the destination pump in the update software, great, simply bridge or NAT each VM onto the Wifi network set up in step 1. Configure each VM to speak to the IP address of each 703N, and perform the update. Done.
* If each VM needs to have the corresponding IP to the pump's, things get a little trickier, and you may need to have another layer of NAT to get this to work. I suspect that you would run into issues with the number of private networks that your Virtualisation software supports, in this case.

Comment Laser cutting directions! (Score 4, Insightful) 59

Breathless excitement!

The achievements in the rest of this paper far outweigh the existence of a tablet built on this foundation.

They've created their own 64-bit processor! They've implemented a compiler for it! They've ported FreeBSD to it! That's some seriously impressive stuff!

But the leader has to be the laser cut tablet assembly. :-(

Comment Re:obviously meant for low-level debugging (Score 2, Insightful) 217

Alas, this hack won't do it:

In other words, this design is powered with a power source that isn't even available until the iPhone/iPod is booted up.

I guess you could fix that with an appropriate external power supply; a little wall-wart and some appropriate voltage regulation.

A USB-serial adapter like the CA-42 (powered from the PC on the other end) would be perfect for that purpose. Check out all the OpenWRT or similar "serial console" articles.

Comment Hadn't really found anywhere to post this . . . . (Score 1) 365

I recently bought an HP 6730b laptop on auction. I took it out of the container, and turned it on (without attaching the power supply). It's pretty snappy, and seems to be in good nick.

Perfect for my mother, I thought.

I plugged the charger in, and started installing Ubuntu. Good God! It's taking an AGE to even go through the POST, never mind running the OS. Shit! And the auction specified no returns if the OS has been changed! Now what?

Xorg is taking 80% of the CPU, just moving the mouse around. WTF!?

Long story short, it turns out it is the aftermarket power brick that is to blame. Unplug it, run it on battery, works like a dream. Plug it in, and it all goes to shit.

Check the voltage on the brick - all according to spec.

Looks like it is time to get a genuine brick for my mom.

My only thought is that the laptop is spending more time cycling between power saving (C3?) states that it actually does executing the instructions it has been given. Can anyone explain this behaviour better?

Comment Re:Buffalo Technology gets my vote. (Score 1) 344

I have bought a Buffalo WZR-HP-G300NH, and couldn't be happier with it.

4 GbE ports (plus one GbE downstream to an ADSL modem in bridged mode), 32MB flash, 64MB RAM, 1 USB port. Supported by OpenWRT.

While ideally I'd also prefer an integrated ADSL + all of the above, the reality is that they are few and far between (meaning: I couldn't find one!) The advantage of the separated configuration is that should the ADSL modem be fried (e.g. by lightning), with any luck, the more expensive router might survive.

Comment Java WebStart, J2ME, Java applets (Score 3, Insightful) 127

One thing that a lot of people are ignoring is that Thawte FreeMail certs are used by a lot of small developers to publish Java apps, and this would kill off that ability quite quickly.

That said, I have not seen a word of this on the Thawte web site, which makes me wonder if the submitter is trying to perform a DoS on Thawte for some reason, and are tricking the slashdotters into being that DoS. The page linked takes an enormous amount of time to decide that there is nothing to return, meanwhile slashdotters are beating on the server over and over. Sorry for the OP, though. The rest of their site still seems to be just fine.

Ocean: A body of water occupying about two-thirds of a world made for man -- who has no gills. -- Ambrose Bierce