Raspberry Pi powered heating controller (Part 2)

In which one Raspberry Pi is seen.

In part one of this series I explained how the central heating system was wired up and what electrical connections you needed to make to switch your heating and hot water on and off.

Heating Controller - breadboard

I ordered all the parts and now I’ve plugged them all together.  Here’s a quick video demonstrating how it will all work.

Further Updates

 

And we’re back…

I’ve moved to another server, and in the process I’ve had a whole lot of problems.  For anyone that’s read any of my blog before that won’t come as a surprise.

Once I’ve got all the kinks worked out, I’ll tell you how I fixed it.  For now, this is just a test…

Fixing “warning: Please check that your locale settings”

I took an Amazon AWS t1.micro instance for a spin the other day. A free server is not to be sniffed at. Of course I installed Ubuntu 12.04 on it.

I was getting a lot of locale errors, things like this:

perl: warning: Setting locale failed.
 perl: warning: Please check that your locale settings:
 LANGUAGE = (unset),
 LC_ALL = (unset),
 LC_MESSAGES = "en_GB.UTF-8",
 LC_COLLATE = "en_GB.UTF-8",
 LC_CTYPE = "en_GB.UTF-8",
 LANG = "en_US.UTF-8"
 are supported and installed on your system.

I thought this would just go away by itself, but it didn’t – so I had to fix it. Note: I’m in the UK, so I’m using en_GB as my locale, change yours to en_US or whatever.

Type:

export LANGUAGE=en_GB.UTF-8
sudo locale-gen en_GB.UTF-8
sudo dpkg-reconfigure locales

And you should be all set.

More Asterisk hints

Wow – a day of fixing loads of niggling little Asterisk problems!

  • Max duration

My calling plan gives me unlimited free calls as long as those calls are under an hour in duration. Pretty standard BT stuff. If you do make a call over an hour you don’t just get charged for that bit of the call over the hour, oh no, you get charged for the whole call.
Anyway – we have the technology to defeat them!

In FreePBX under General Settings change your Asterisk Outbound Dial command options to include:

L(3360000,3240000,10000)

which will drop the call after 3360000ms (56 minutes) and should alert you at 3240000ms.

  • Courtesy Tone

The above works very well and drops the calls, but without a bit of extra magic you don’t get the warning in your ear – it just drops the call. To enable the warning tones etc edit this:

/etc/asterisk/features_general_custom.conf

and add

courtesytone=beep

substituting “beep” for what ever noise you want to hear.

  • Call Recording

By also adding:

Ww

to the Dial command options in #1 you can press *1 when you’re in a call to start recording.  It plays the courtesy tone to both parties though.

Asterisk VoIP calls causing PPP to drop on ADSL modems

The internet FTW.

I’ve been having this odd problem since I got my Asterisk box back up and running in that whenever a call came in and hung up I’d lose internet connectivity for a few seconds.

I tracked it down to the router dropping the PPP connection, which initially made me think that the polarity reversal indicating the call had hung up was causing the modem to b0rk, perhaps due to the distance between the phone socket and the modem, or my dodgy cat5 cabling, or something.

Turns out it was none of the above.  EDIT:  Bit hasty there.  Hasn’t fixed it al all.

This post:

http://forums.contribs.org/index.php/topic,43733.msg209081.html#msg209081

points to exactly my problem. I disabled the DDoS protection and no more dropped internet connections. I don’t worry about DDoS attacks too much, so for now I’m going to leave it off.

UPDATE:  None of the above actually worked.  In the end it turned out the modem had simply broken.  The NV RAM wasn’t remembering the config after a proper reboot and it was generally broken.  So I replaced the whole thing with a new DrayTek modem.  The old one did pretty well, it worked perfectly for about 3 years non-stop.

Search hints:

DrayTek VoIP Asterisk dropping ADSL PPP drop DDoS SIP

SMSq No call scheduled as already sending

In order to remind myself:

I kept getting this error when trying to send an SMS;

No call scheduled as already sending

It seems SMSq or Asterisk is quite picky about who sends the SMS. If I tired to send an SMS as myself it would fail, and then clog up /var/spool/asterisk/sms/motx with undead SMSes.

If I run smsq as the same user as Asterisk is running as it works (once you’ve deleted all the crap out of motx directory.

Just need to work out why now.

Hauppauge WinTV-NOVA-HD-S2 on Ubuntu Lucid 10.04

Ubuntu 10.04 doesn’t include the required firmware to get this card to work.  Probably due to some licensing issues.

Although the card gets detected and you get the frontend device and the demod device a scan will fail to detect any channels.

The reason is that the firmware isn’t there.

Solution, copy this file to /lib/firmware/ and reboot

dvb-fe-cx24116.fw

Tsch.  What a bell end.  Instead, install the package:

linux-firmware-nonfree

They don’t go out of their way to draw much attention to it, like telling anybody or anything.