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by error404
Fri May 25, 2012 12:29 am
Forum: General discussion
Topic: IRC eggdrop bot on PI??
Replies: 7
Views: 9168

Re: IRC eggdrop bot on PI??

I haven't used it in like a decade, but I'm pretty sure eggdrop is pure C and should work fine. Also IIRC its only dependency is TCL.

See the many other threads on Android.
by error404
Fri May 25, 2012 12:26 am
Forum: General programming discussion
Topic: Java or Mono for basic GUI rPi apps?
Replies: 23
Views: 11623

Re: Java or Mono for basic GUI rPi apps?

Qt. I know it's not on your list, but it pretty effectively protects you from the details of C/C++, has an excellent (IMO) framework and GUI library design, and good, easy to use tools for UI design and whatnot. It's quite a bit different conceptually than either Java or .NET, but I personally think...
by error404
Thu May 24, 2012 6:52 pm
Forum: General discussion
Topic: .Net CLR?
Replies: 9
Views: 2881

Re: .Net CLR?

Or they could use the free MonoDevelop IDE and Mono toolchain directly on the Pi, if they really wanted to use C# / .NET :P
by error404
Thu May 24, 2012 6:45 pm
Forum: Automation, sensing and robotics
Topic: Garage Door opener via phone dial?
Replies: 38
Views: 17451

Re: Garage Door opener via phone dial?

Asterisk would definitely be able to do this, but configuring it is a bit of a bear. Shouldn't be that hard really. You could use ipkall to get a free phone number, forward that to FWD or CallCentric or voip.ms or any other provider that gives free IP->IP SIP accounts and then have Asterisk register...
by error404
Thu May 24, 2012 12:10 am
Forum: Networking and servers
Topic: Radio Network
Replies: 9
Views: 7760

Re: Radio Network

WiFi is the obvious choice here. Anything you roll your own is going to be pathetically slow (think maybe 9600bps at best, if you're good at DSP and modulation theory), or very complicated and expensive (see RONJA). 80m isn't really a big deal, even for consumer grade WiFi equipment. In fact I'd be ...
by error404
Wed May 23, 2012 11:33 pm
Forum: Python
Topic: Best Database
Replies: 34
Views: 106195

Re: Best Database

VACUUM works basically by copying the data to a new file and then deleting the old file, so if the file is all empty space it won't require twice the database size, just twice the data size. It's still a pretty inefficient operation obviously. auto_vacuum is probably a good solution for your case. Y...
by error404
Wed May 23, 2012 8:47 pm
Forum: Automation, sensing and robotics
Topic: solenoid on raspberry pi
Replies: 1
Views: 2031

Re: solenoid on raspberry pi

It depends which voltage you choose for the solenoid (it seems there are different parts depending on voltage, not a single spec), but this solenoid is pretty beefy. It requires at least 10W of drive, so you will need a reasonably large switch to turn it on. I would suggest a circuit like this: Unti...
by error404
Wed May 23, 2012 8:18 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C ADC
Replies: 99
Views: 32248

Re: I2C ADC

I2C is maybe easier to implement from a system design point of view, but it's a much more complicated and difficult interface to understand/debug/implement at the hardware level. The hardest part of using an ADC properly is going to be the analog front end. If you want something easy and simple, and...
by error404
Wed May 23, 2012 7:58 pm
Forum: Networking and servers
Topic: pfSense / Networking Cluster
Replies: 11
Views: 38667

Re: pfSense / Networking Cluster

Huge fan of pfSense. I don't think it's worth the effort of porting to the Pi hardware though, the hardware is about as far as you can get from suitable for networking. It'd be nice to see something that is, but you really need an SoC that's optimized for it with at least one GMII MAC for a GigE phy...
by error404
Wed May 23, 2012 9:30 am
Forum: Media centres
Topic: RasPi as Audio Player
Replies: 6
Views: 15834

Re: RasPi as Audio Player

Actually you might be right, I think I'm the one being stupid here. The phone is the device, the Pi is the host and everything should work. You definitely want A2DP for music. The code exists for this in Linux; you will need the Bluez stack. See here for example: http://ceworkbench.wordpress.com/201...
by error404
Wed May 23, 2012 6:24 am
Forum: General discussion
Topic: My RasPi running off AAA batteries
Replies: 31
Views: 9676

Re: My RasPi running off AAA batteries

The very best 18650 cells available from a legit manufacturer right now are about 3000mAh, 5000mAh is a joke (as are your 1800mAh AAAs). I'd expect maybe 1800mAh out of them if you're lucky, probably less. Also those cells don't seem to have protection, and for a DIY project I wouldn't use unprotect...
by error404
Wed May 23, 2012 5:58 am
Forum: General discussion
Topic: Ras-Pi & Main Socket
Replies: 11
Views: 2121

Re: Ras-Pi & Main Socket

There shouldn't be any problem with proximity to the AC adapter unless it is very badly designed / built. If you were wanting to open it up and hack them into the same case you'd have to take care to maintain isolation between the mains and the secondary side, but I don't think you're wanting to do ...
by error404
Wed May 23, 2012 4:29 am
Forum: Media centres
Topic: RasPi as Audio Player
Replies: 6
Views: 15834

Re: RasPi as Audio Player

http://musicpd.org/ for all your music server needs. There are good clients for most platforms and it has good format and library support and works well on small machines. Bluetooth unfortunately is pretty much out unless you're willing to spend a bit of money. It is much like USB in that there are ...
by error404
Wed May 23, 2012 1:18 am
Forum: Off topic discussion
Topic: Raspberry Pi and the MSP430
Replies: 9
Views: 4915

Re: Raspberry Pi and the MSP430

Interesting. If I'd known that I would've bought another Launchpad instead of the captouch board!
by error404
Tue May 22, 2012 11:41 pm
Forum: Off topic discussion
Topic: Raspberry Pi and the MSP430
Replies: 9
Views: 4915

Re: Raspberry Pi and the MSP430

As far as I can tell, the included devices are still MSP430G2211 and MSP430G2231, neither of which has a UART. The captouch addon includes the G2452. Where'd you find those other devices listed?
by error404
Tue May 22, 2012 9:20 pm
Forum: Python
Topic: Best Database
Replies: 34
Views: 106195

Re: Best Database

Given your requirements I would definitely say SQLite is the right choice. You could implement a trigger to automatically prune records older than a certain date (if you store a timestamp), or the oldest ones when the count is more than you set or whatever. Or you could just do it in your applicatio...
by error404
Tue May 22, 2012 9:14 pm
Forum: General discussion
Topic: Cheap Remote Control - Would this work on the Pi?
Replies: 9
Views: 11081

Re: Cheap Remote Control - Would this work on the Pi?

Thanks to Microsoft, pretty much every standard remote available these days conforms to their Windows Media Centre specification and should work anywhere easily. I use a similar cheap remote with my HTPC and it was painless to set up with LIRC, though if you're not experienced with Linux you might c...
by error404
Tue May 22, 2012 5:56 pm
Forum: Debian
Topic: Debian ARM on Raspberry Pi
Replies: 135
Views: 79327

Re: Debian ARM on Raspberry Pi

I think you probably need the CONFIG_PPP_FILTER option enabled in your kernel.
by error404
Tue May 15, 2012 9:12 pm
Forum: General discussion
Topic: Design flaw? Polyfuses for USB current limiting
Replies: 245
Views: 123631

Re: Design flaw? Polyfuses for USB current limiting

I don't agree. Look again at MrEngmans last post where he quotes an excerpt from the USB2.0 spec. It's not about agreeing or not. Go read and understand the spec yourself. Devices, as in devices on the bus, are in low-power mode by default (that is they must draw under 100mA). Their elevation to 'h...
by error404
Tue May 15, 2012 7:47 pm
Forum: Off topic discussion
Topic: Raspberry Pi and the MSP430
Replies: 9
Views: 4915

Re: Raspberry Pi and the MSP430

The MSP430 toolchain is in Debian testing, and is built for ARM. GrahamC is right though, the included chip doesn't actually have a UART attached to the USB interface, it's just a (rather slow) software UART. You might be able to write one yourself that performs better (probably), but it can be chal...
by error404
Tue May 15, 2012 7:39 pm
Forum: Staffroom, classroom and projects
Topic: Is "free" always a good thing?
Replies: 87
Views: 14066

Re: Is "free" always a good thing?

I think education (and government) is a perfect venue for open source to succeed and be a huge boon - but it really needs to be embraced by the stakeholders. Schools have specific niche needs, and aren't really driven by business interests. If a sea-change in attitude at educational institutions occ...
by error404
Tue May 15, 2012 7:26 pm
Forum: General discussion
Topic: Design flaw? Polyfuses for USB current limiting
Replies: 245
Views: 123631

Re: Design flaw? Polyfuses for USB current limiting

I suspect you misunderstood what I wrote. I didn't say that the USB spec calls for measuring the actual current drawn, I said it should "hard" limit the current to either 100mA or 500mA, big difference. But that's not what the spec says, nor is it common practice. The spec requires current limiting...
by error404
Mon May 14, 2012 1:25 am
Forum: Troubleshooting
Topic: USB Flash Drive Root Ownership Can't Be Changed
Replies: 3
Views: 6490

Re: USB Flash Drive Root Ownership Can't Be Changed

Sounds like your USB disk is FAT32 or NTFS formatted, neither of which support *nix permissions system. You should be able to set the owner at mount time by passing the 'uid=user' option setting the user you want to own the files. You could also set 'umask=000' to set all files in the filesystem to ...
by error404
Sun May 13, 2012 7:36 pm
Forum: Other projects
Topic: Rassberry Pi and Jack audio
Replies: 70
Views: 61054

Re: Rassberry Pi and Jack audio

Have you tried Ardour? It's pretty complete and you'll have to work for some years to even think about competing with it...

JACK should work on the Pi, though you will obviously also need a proper audio interface. Also the Pi is probably too slow for DAW work.
by error404
Sun May 13, 2012 7:31 pm
Forum: Advanced users
Topic: u-boot image?
Replies: 14
Views: 7854

Re: u-boot image?

Getting Pi's networking into uBoot will be difficult. It's connected via USB, so first you will need a full USB stack, then a driver for the network device itself.

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