Tuesday, 25 August 2015

plusnet router

http://community.plus.net/forum/index.php?action=printpage;topic=137629.0

Monday, 24 August 2015

linux and the EL-USB-RT

# git clone https://github.com/rca/lascar-usb-thermometer # no longer maintained.
git clone git://github.com/signal11/hidapi.git
cd hidapi/linux
make


linux thermometer

Without shame, some of this was copied from 

http://verahill.blogspot.co.uk/2013/12/532-temper-temperature-monitoring-usb.html

:)  Thanks for your work!  



sudo apt-get install python-usb python-setuptools snmpd git
sudo easy_install snmp-passpersist
mkdir ~/tmp
cd ~/tmp
git clone git://github.com/padelt/temper-python.git
cd temper-python/
sudo python setup.py install

sudo temper-poll

Generates a result!  But it needs sudo.

Figure out which /dev/bus/usb device this is, then change the owner of this `file` from root to me:

$ lsusb

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 014: ID 0781:5567 SanDisk Corp. Cruzer Blade
Bus 001 Device 015: ID 0c45:7401 Microdia 
Bus 001 Device 004: ID 1058:1123 Western Digital Technologies, Inc. My Book 3.0
Bus 001 Device 126: ID 046d:c077 Logitech, Inc. 
Bus 001 Device 125: ID 413c:2107 Dell Computer Corp. 
Bus 001 Device 124: ID 2109:3431  
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

The interesting device is Bus 001 Device 015.

$ ls -lha /dev/bus/usb/001/
total 0
drwxr-xr-x  2 root root      180 Aug 24 10:16 .
drwxr-xr-x 10 root root      200 Jul 14 12:14 ..
crw-rw-r--  1 root root 189,   0 Jul 14 12:14 001
crw-rw-r--  1 root root 189,   3 Jul 15 17:20 004
crw-rw-r--  1 root root 189,  13 Aug  6 14:56 014
crw-rw-r--  1 root root 189,  14 Aug 24 16:14 015
crw-rw-r--  1 root root 189, 123 Jul 14 12:17 124
crw-rw-r--  1 root root 189, 124 Jul 14 12:17 125
crw-rw-r--  1 root root 189, 125 Jul 14 12:17 126

There it is:

$ sudo chown me /dev/bus/usb/001/015

And now I can access the device without sudo.  :)

Will that work after unplugging?  No!  The permissions are gone...

$ sudo vim /etc/udev/rules.d/80-temper.rules


SUBSYSTEMS=="usb", ATTRS{idVendor}=="0c45", ATTRS{idProduct}=="7401",
GROUP="users", MODE="0666"
Unplug,

sudo service udev restart

Plug back in.  

Now for something really neat from the site above:  Setup a cron job to grab the temperature, log it, plot the data.

**************************************8

After all that, I'm getting only one temperature value and it's from the sensor inside the device:  not the remote one.  It's the remote one that I'm interested in.  Some reading around suggests there are other libraries:  let's see.

https://pypi.python.org/pypi/hidapi/0.7.99-5


Thursday, 20 August 2015

to watch

True detective
Wild at heart (David Lynch)
Black Mirror
Ex Machina
Napoleon Dynamite
Sliding doors.

Wednesday, 19 August 2015

music to check

experience ludovico einaudi

Saturday, 15 August 2015

ripping radio

http://ubuntuforums.org/showthread.php?t=1183973

Wednesday, 12 August 2015

ebook sites

http://www.ebooktrove.com/

Monday, 3 August 2015

relativity simulations

http://gamelab.mit.edu/research/openrelativity/