Feed SparkFun Electronics [copy] http://www.sparkfun.com/feeds/news has loading error: cURL error 22: The requested URL returned error: 405
Feed The RFID Weblog [copy] http://www.rfid-weblog.com/index.rss has loading error: cURL error 22: The requested URL returned error: 404 Not Found
Feed tqfp.org [copy] http://tqfp.org/rss/ has loading error: cURL error 22: The requested URL returned error: 502 Bad Gateway
Wireshark dissector for 3GPP CBSP - traces wanted!
I recently was reading 3GPP TS 48.049, the specification for the CBSP (Cell Broadcast Service Protocol), which is the protocol between the BSC (Base Station Controller) and the CBC (Cell Broadcast Centre). It is how the CBC according to spec is instructing the BSCs to broadcast the various cell broadcast messages to their respective geographic scope.
While OsmoBTS and OsmoBSC do have support for SMSCB on the CBCH, there is no real interface in OsmoBSC yet on how any external application would instruct it tot send cell broadcasts. The only existing interface is a VTY command, which is nice for testing and development, but hardly a scalable...
Seamonkey's gradual showdown
Finding and testing alternative web browsers and email clients to Seamonkey. An in-depth critique of Firefox, Thunderbird and many more.
IBM 5161 Expansion Chassis Extender and Receiver Cards
Today is an exciting day for people who collect vintage IBM PCs and XTs! IBM had a somewhat obscure add-on product called the 5161 expansion chassis, which looked exactly like an IBM PC but with a difference case badge. It allowed customers to add two additional full-height drives (typically 10MB MFM hard drives) and 7 usable expansion slots (excluding the one used for the MFM disk controller). And yes, with those full-height hard drives, it sounded like a jet engine.
Connecting the expansion chassis to the host PC were two expansion cards. One, the extender, was placed in the host PC....
Free Stuff, June and July 2018
junio 2018
El destinario de Cosas Gratis para junio es Gabriel Martín Miguel de Salamanca, España. Él quiere hacer una plataforma de radio asequible a los nuevos radioaficionados para acercarles las nuevas formas de hacer radio. Él tiene un grupo de Facebook sobre SDR para usuarios, programadores y radioficionados en español, tanto en España como en latinoamerica, aqui: facebook.com/groups
July 2018CTRL-H Hackerspace of Portland, Oregon asked us for a HackRF One. They plan to use it for SDR workshops and their Electronics Lab Radio Closet, where they'll be capturing and hosting as much data as possible through SDR. It looks like they...
Still alive, just not blogging
It's been months without any update to this blog, and I feel sad about that. Nothing particular has happened to me, everything is proceeding as usual.
At the Osmocom project we've been making great progress on a variety of fronts, including
3GPP LCLS (Local Call, Local Switch)
Inter-BSC hand-over in osmo-bsc
load Based hand-over in osmo-bsc
reintroducing SCCPlite compatibility to the new BSC code in osmo-bsc / libosmo-sigtran
finishing the first release of the SIMtrace2 firmware
extending test coverage on all fronts, particularly in our TTCN-3 test suites
tons of fixes to the osmo-bts measurement processing / reporting
higher precision time of arrival reporting in osmo-bts
migrating osmocom.org services to new,...
Free Stuff, May 2018
We sent Oleksandr Tytko a HackRF One. He is studying at Lyceum No 1, Chernivtsi, Ukraine. He and his classmates plan to use the HackRF One to learn about SDR and to write and test their own code. He is also very enthusiastic about starting an open source project studying the influence of radio frequencies on plants and people. He sent us a picture of the greenhouse in his local Botanic Garden where he plans to do the research:
Dan Groeneveld is an instructor at Northland Pioneer College in Show Low, Arizona. He is going to be teaching net security and...
Free Stuff, April 2018
April's Free Stuff recipient is EFF (The Electronic Frontier Foundation). EFF is a nonprofit organization that defends civil liberties in the digital world. From their website: Founded in 1990, EFF champions user privacy, free expression, and innovation through impact litigation, policy analysis, grassroots activism, and technology development. We work to ensure that rights and freedoms are enhanced and protected as our use of technology grows.
Andrés Arrieta, Technology Projects Manager, has asked for a HackRF One because: At EFF we are looking how technologies impact our rights in our daily lives. Research has already shown many vulnerabilities in the standards...
Free Stuff, March 2018
The Free Stuff recipient for March is Jan van Katwijk, a hobby programmer from the Netherlands. He plans to use his new HackRF One to finish his work on DAB software by providing a library for HackRF, then for experimenting with wideband receiving issues. His current developments include software support for ACARS and ADS-B decoding.sdfsdfdsf A full overview of his work is available here and here.
If you'd like to submit your project idea for consideration to receive free hardware from Great Scott Gadgets, please visit the Free Stuff page and send us a message!
Re-launching openmoko USB Product ID and Ethernet OUI registry
Some time after Openmoko went out of business, they made available their USB Vendor IDs and IEEE OUI (Ethernet MAC address prefix) available to Open Source Hardware / FOSS projects.
After maintaining that for some years myself, I was unable to find time to continue the work and I had handed it over some time ago to two volunteers. However, as things go, those volunteers also stopped to respond to PID / OUI requests, and we're now launching the third attempt of continuing this service.
As the openmoko.org wiki will soon be moved into an archive of static web pages only, we're also moving the list of...
Калькулятор скорости UART для AVR
Калькулятор скорости UART для AVR-микроконтроллеров. По умолчанию отображаются таблицы для основных популярных частот процессора и скоростей обмена. При желании эти параметры можно изменить.
Значения в таблицах подсвечены разными цветами в зависимости от отклонения реальной частоты передачи от желаемой: менее 0.1%, менее 0.5%, менее 1%, менее 2%, менее 3%, более 3%.
Bit Rate:
Clock Freq, MHz:
fCPU = 1 MHzBit RateU2Xn = 0U2Xn = 1UBRR(dec)UBRR
(hex)Actual
Bit RateErrorUBRR
(dec)UBRR
(hex)Actual
Bit RateError3002070x00CF300.480.2%4160x01A0299.76-0.1%6001030x0067600.960.2%2070x00CF600.960.2%900680x0044905.80.6%1380x008A899.28-0.1%1200510x00331201.920.2%1030x00671201.920.2%1800340x00221785.71-0.8%680x00441811.590.6%2400250x00192403.850.2%510x00332403.850.2%3600160x00103676.472.1%340x00223571.43-0.8%4800120x000C4807.690.2%250x00194807.690.2%960060x00068928.57-7%120x000C9615.380.2%14.4 K30x000315.625 K8.5%80x000813.889 K-3.5%19.2 K20x000220.833 K8.5%60x000617.857 K-7%28.8 K10x000131.25 K8.5%30x000331.25 K8.5%33.6 K10x000131.25 K-7%30x000331.25 K-7%38.4 K10x000131.25...