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by RolfBly
Mon Dec 28, 2015 4:32 pm
Forum: Beginners
Topic: Sitecom Wireless-N USB 300N - WLA-2100 not working.
Replies: 13
Views: 8534

Re: Sitecom Wireless-N USB 300N - WLA-2100 not working.

I ended up returning it, got my money back and bought a known working one. There is now an official pi wifi dongle, see here:
https://www.raspberrypi.org/products/usb-wifi-dongle/
by RolfBly
Sat Feb 07, 2015 2:29 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Assigning same USBtty linux to a device every time
Replies: 5
Views: 12032

Re: Assigning same USBtty linux to a device every time

I had the same problem and found the syntax for the rule to be quite critical. Also, I never found a single document that explained everything I wanted to know about this topic. So I compiled one of my own, to be found here. I hope it's useful to some.
by RolfBly
Fri Oct 24, 2014 3:02 pm
Forum: Troubleshooting
Topic: Edimax Wifi adapter seems to go to sleep if not used (solved
Replies: 37
Views: 99834

Re: Edimax Wifi adapter seems to go to sleep if not used

Here is some documentation about the power settings. Adafruit have a slightly different solution , with rtw_power_mgnt=0 rtw_enusbss=1 rtw_ips_mode=1. (Edit 27-10). This also works, But! The documentation says: In PS mode, you can turn on or turn off the USB autosuspend functionality . From this, I ...
by RolfBly
Tue Feb 18, 2014 9:55 pm
Forum: Automation, sensing and robotics
Topic: Python driver for DS1621 I2C temperature sensor
Replies: 1
Views: 1983

Python driver for DS1621 I2C temperature sensor

Hi. I wrote a driver in Python for the Maxim/Dallas DS1621 temperature sensor chip. It gives you the temperature in 3 resolutions, lets you set the upper and lower thermostat limits, deals with the odd data format of the DS properly, lets you set one-shot mode or continuous mode, and lets you select...
by RolfBly
Tue Feb 18, 2014 9:42 pm
Forum: Python
Topic: SMBus i2c reading two bytes in to a float
Replies: 4
Views: 3792

Re: SMBus i2c reading two bytes in to a float

I wrote a driver in Python for the DS1621 in Python. It deals with the odd data format properly. It also lets you set the upper and lower thermostat limits, reads temperature in three different resolutions, lets you switch from one-shot mode to continuous mode, and lets you select whether the thermo...
by RolfBly
Sat Dec 07, 2013 11:07 pm
Forum: Beginners
Topic: Sitecom Wireless-N USB 300N - WLA-2100 not working.
Replies: 13
Views: 8534

Re: Sitecom Wireless-N USB 300N - WLA-2100 not working.

Same problem here.

This thread on a German Mint forum has some suggestions that did not work for me. Crashed Pi, in fact.
by RolfBly
Fri Oct 25, 2013 9:00 am
Forum: General discussion
Topic: Python IDE
Replies: 17
Views: 56287

Re: Python IDE

In my experience, Pi just doesn't have enough horsepower to run any decent IDE if your code is longer than one screen. Geany and Ninja IDE are nice, but scrolling lags hopelessly. IdleX doesn't do code collapsing and looks sloppy to me. (I used them all over TightVNC) When coding Python for Windows,...
by RolfBly
Fri Jul 19, 2013 9:44 pm
Forum: Media centres
Topic: Volume with Pi Musicbox
Replies: 12
Views: 9220

Re: Volume with Pi Musicbox

[quote="woutervanwijk"]You could change the % value in /etc/rc.local in this line: #set PCM of Pi higher, because it's really quit otherwise (hardware thing) amixer -c 0 -- sset PCM playback 75% > /dev/null 2>&1 || true Strange, but with 75%, the headphones out via a normal audio amp AUX input is st...
by RolfBly
Fri Jul 19, 2013 9:38 pm
Forum: Media centres
Topic: Volume with Pi Musicbox
Replies: 12
Views: 9220

Re: Volume with Pi Musicbox

SteveSpencer wrote:I think that if you set things up manually, then use

alsactl store

that should persist across reboots.

Steve
It doesn't, see the next post by Wouter van Wijk: sound settings are being overwritten at boot time (from /etc/rc.local)
by RolfBly
Thu Jul 18, 2013 7:34 pm
Forum: Troubleshooting
Topic: Win 32 disk imager
Replies: 47
Views: 91938

Re: Win 32 disk imager

I had the same error 5 when using Image Writer for Windows on a fresh 8 GB card.
After a quick reformat with SD formatter 4 for SD/SDHC/SDXC, the image was written without any errors.
by RolfBly
Wed Jan 23, 2013 10:14 am
Forum: Networking and servers
Topic: Simple SMS Gateway
Replies: 17
Views: 32006

Re: Simple SMS Gateway

@odelcarmen as an alternative to the Huwaei, many GSM's that support serial communication via RS-232 (or USB) have a modem built in. And some are really cheap via eBay etc. I made something with a Siemens M35 and Gnokii. Full detail here . . Another note on Huawei GMS/UMTS modems: at first, I dismi...
by RolfBly
Mon Jan 14, 2013 9:26 am
Forum: Networking and servers
Topic: Simple SMS Gateway
Replies: 17
Views: 32006

Re: Simple SMS Gateway

@odelcarmen as an alternative to the Huwaei, many GSM's that support serial communication via RS-232 (or USB) have a modem built in. And some are really cheap via eBay etc. I made something with a Siemens M35 and Gnokii. Full detail here . @ax206geek thanks for the Gammu tip! Will have a look at tha...
by RolfBly
Sat Jan 12, 2013 8:52 pm
Forum: General discussion
Topic: Raspberry Pi with USB 3G/GPRS modem without USB powered hub?
Replies: 7
Views: 16937

Re: Raspberry Pi with USB 3G/GPRS modem without USB powered

There was an article in Elektor feb 2011 on how to make an SMS gateway using an old GSM phone with Damn Small Linux. I applied that article to Raspberry Pi. Basically, you connect the phone via USB and then use Gnokii to talk to it. All the ins & outs are here. I Hope it's useful.
by RolfBly
Fri Oct 26, 2012 8:30 am
Forum: Networking and servers
Topic: HowTo Telnet/ssh to PI in Raspbian “wheezy”
Replies: 12
Views: 207312

Re: HowTo Telnet/ssh to PI in Raspbian “wheezy”

2. How to find the RPI local IP address? Remember, it's headless, so no way to type ipconfig -a! Most likely the easiest way would be to look at your router and it's listed LAN connections. It should list it there. Another device on the network like an Android device can probe the network with some...
by RolfBly
Tue Oct 09, 2012 8:10 pm
Forum: Troubleshooting
Topic: Cron Failure
Replies: 3
Views: 15081

Re: Cron Failure

Having spent a few hours trying to fix something that already worked, other Linux newbies like me might find this useful. A 'hello world' bash script that displays text just fine in the terminal when run by itself, remains silent when launched as a cron task. A cron task tries to *mail* any text out...
by RolfBly
Fri Aug 03, 2012 7:38 pm
Forum: General discussion
Topic: RasPi power usage measurements ALL Models
Replies: 156
Views: 284199

Re: RasPi power usage measurements ~2 watts at idle

@AlexEames: There are bistable a.k.a. latching relais. You give them a pulse, they toggle. So you'd only need a fairly beefy current at switching time, not continuously.

if I only had time :roll:
by RolfBly
Sun Jul 22, 2012 7:00 pm
Forum: General discussion
Topic: RasPi power usage measurements ALL Models
Replies: 156
Views: 284199

Re: RasPi power usage measurements ~2 watts at idle

Impressive work being done here. :D Some thoughts on solar powered applications. I think it's safe to say current draw in idle mode is 100..120 mA, and it's not just the processor that eats it but also other components. So I guess it'll be hard to drive that number down with firmware changes. And I ...
by RolfBly
Mon Jul 16, 2012 8:46 pm
Forum: General discussion
Topic: Power Supply Opinion Please
Replies: 15
Views: 3704

Re: Power Supply Opinion Please

@Gert van Loo. I wonder where you get that information on the 7805 from. See this datasheet: http://www.datasheetcatalog.org/datasheets/228/390068_DS.pdf 12 V into a 7805 is just fine. Put it on a little heat sink to be on the safe side. Not so much of the little. You'll need at least six square in...
by RolfBly
Mon Jul 16, 2012 7:10 pm
Forum: General discussion
Topic: Power Supply Opinion Please
Replies: 15
Views: 3704

Re: Power Supply Opinion Please

@Gert van Loo.
I wonder where you get that information on the 7805 from. See this datasheet:
http://www.datasheetcatalog.org/datashe ... 068_DS.pdf
12 V into a 7805 is just fine. Put it on a little heat sink to be on the safe side.

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