Hello FreeCalypso and Themyscira community,
I got some new developments in our GSM codec libraries and utilities
suite, which I am now in the process of preparing for release:
https://www.freecalypso.org/hg/gsm-codec-lib/
I still need to write a bunch of new documentation before I can cut
the
Hello fellow retronetworkers,
For a long time I've been looking to get my hands on a traditional GSM
TRAU, a hardware converter from 16 kbit/s (or 8 kbit/s in the case of
HR) speech channels going to a traditional T1/E1 BTS to full 64 kbit/s
PCM channels, complete with speech transcoding
Hi Vadim,
> I was curious about the OTA firmware update procedure, which is
> supported by the stock firmware of Pirelli DP-L10 (a.k.a. Arcor Twintel
> DP-L10, a.k.a. Telekom TC-300, ...). Mychaela documented some of her
> assumptions about the OTA procedure here:
>
>
Hello FC community,
In the spirit of better late than never, I just wrote and published a
proper user's manual for our DUART28 adapter:
https://www.freecalypso.org/pub/GSM/FreeCalypso/duart28-userman-latest.pdf
https://www.freecalypso.org/pub/GSM/FreeCalypso/duart28-userman-latest.ps
Hello FreeCalypso community,
A new release of FC host tools is out:
https://www.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-r21.tar.bz2
https://www.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-latest.tar.bz2
(symlink)
All history of recent changes is here:
Hello FC community,
As Vadim has been experimenting further with Sony Ericsson J120 and
K2x0 phones, uncovering more of their quirks, I couldn't shake the
feeling that SE J120 seemed familiar, that I had seen something very
similar before. So I took a closer look at SE J120 flash dumps
(provided
Hi Vadim,
> just letting you know that it worked! I was able to unlock all flash
> sectors on a K200i phone with the SAMSUNG flash.
Nice to hear that it works as expected.
> P.S. I am seeing more commits in the freecalypso-tools repository ;)
I implemented ppb-program and ppb-erase-all for
Vadim wrote:
> I will keep an eye on the fc-loadtool repository and look forward to
> hear any news from you.
>
> It's not like I need to be able to unlock and overwrite those locked
> sectors, I am just curious to learn how this kind of protection works.
> But well, I would also love to see
Hi Vadim and community,
> I did some tests in my own Osmocom based network and found out that both
> R1AA003 and R1AA008 look identical on the radio interface, and more
> specifically both phones do indicate both AMR FR and AMR HR as supported.
OK, same as TI reference fw for final
Hi Vadim,
> Today I took the phone apart and made a few photos of the PCB. Here is
> the best one of them, uploaded to Osmocom's Redmine:
>
> https://osmocom.org/attachments/7155
> https://osmocom.org/attachments/download/7155/SE-J120i-PCB.jpg
Thank you for this photo, it is very clear!
> *
Hi Vadim,
> Of course the MS Classmark does not contain any bits related to the
> codec support. I meant to say the Bearer Capability, but wrote this
> instead. In any case, for the sake of completeness, I will compare both
> the Bearer Capability and the Classmark between those firmware
Hi Vadim and community,
> I acquired another SE K200i and picked it up from the local post
> department today. It's the third K200i in my collection, and this new
> phone is a bit different from the two that I already have.
> [...]
> * SAMSUNG K5L29xx_A flash (according to fc-loadtool), not
Hello FreeCalypso community,
We have another "new" phone discovery: Sony Ericsson J120 family.
Like other SE phones of that era, the lowercase suffix after the number
indicates GSM frequency bands: J120i is the version with 900+1800 MHz
bands, and presumably there was also J120a with 850+1900 MHz
Hello FreeCalypso community,
I am pleased to announce a new addition to our software family: a suite
of tools for working with USB-serial chips, currently FT2232x from FTDI
and CP2102 from Silabs. The first official release is here:
Hello fellow GSM MS tinkerers,
Question: is there anyone on either ML who has any experience with
powering a GSM MS from USB, or had at least thought about this problem?
We all know the fundamental problem: during Tx bursts the PA in a GSM
MS can suck as much as 2 A, but the current budget of a
Hello fellow retrotechnologists,
This morning (my UTC-8:00 time zone) there was a USSE-only OsmoDevCall,
but most of the topics discussed were more of RetroNetCall nature,
which I don't mind at all - I am a retrocomputist first and foremost,
and retronetworking goes quite well along with
Hello SIMtrace enthusiasts,
As mentioned previously on various occasions, FreeCalypso SIMsniff is
a hardware+FPGA+software solution I put together to serve as a partial
replacement for Osmocom SIMtrace. I call it a partial rather than
complete replacement for SIMtrace because the piece which I
Hello FC community,
I wrote just over 24 h ago:
: The design will be done in one of my public Mercurial repositories, I
: will start by writing a detailed board design specification, and that
: spec will be posted for review once it's ready in its first draft.
The first draft of the design spec
Hello FreeCalypso community,
I have an announcement to make: I am looking into building a new GSM MS
development board, tentatively named FC Minnie. (This choice of name
was inspired by this board being a "mini-modem".) FC Minnie will be
built around FC Tango module (previously known as iWOW
Hi Vadim,
> Ack. I agree that the 'gsm-codec-lib' should be consistent with the
> existing 'gsm' package in this regard. I can patch the PKGBUILD to
> install the header files to the '/usr/include/gsm/' directory.
Sounds good!
> If the 'gsm-codec-lib' gets enough votes, we can of course
Hello GSM MS communities,
I have a large inventory of FC Caramel2 boards that are in need of
loving homes. I mean these boards:
https://www.freecalypso.org/members/falcon/Caramel2/c2-fully-assembled.jpeg
For those who are familiar with FCDEV3B, Caramel2 boards are very
similar: all FreeCalypso
Hello FreeCalypso community,
The new official release of FC host tools is out:
https://www.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-r20.tar.bz2
https://www.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-latest.tar.bz2
(symlink)
Aside from minor bugfixes, the only changes from the
Hi Vadim,
> I acknowledge this, so here is a release package for gsm-codec-lib:
> https://aur.archlinux.org/packages/freecalypso-gsm-codec-lib
Thanks! Looking closer, I see one additional issue which I haven't
had to address previously. libgsmfrp and the utilities part of
gsm-codec-lib depend
Hello FC community,
I just added alternative HTTPS access to our FTP collection:
https://www.freecalypso.org/pub/
Seeing that FTP URLs no longer work for people these days, this little
step has been long overdue.
The FTP collection at ftp.freecalypso.org, the same one that is now
accessible
Hi Vadim,
> I see another option: installing a file to '/etc/profile.d/', which will
> add '/opt/freecalypso/bin' to $PATH.
Thanks for the tip - I didn't realize that there is this easy way for
"modern" users to add non-standard directories to their $PATH. (For
my own use I have that
Hi Vadim,
> FYI, I just created a new 'freecalypso-tools' package for Arch Linux:
>
> https://aur.archlinux.org/packages/freecalypso-tools-hg
>
> The '-hg' in its name means that it's the most recent version from the
> repository
Looks good so far! In the case of FC host tools package that has
Hello FreeCalypso community,
A little over a week ago I and my SO made a cross-border visit to
Mexico for the specific purpose of more thoroughly exploring that
lovely country's GSM network. (MCC=334, MNC=020, Name=Telcel.) A
basic report on this visit is posted here:
Hello FreeCalypso community,
I just recently put together a new toolkit for running FC firmware in
aftermarket configurations on Motorola C1xx and Pirelli DP-L10 targets.
Here is the set of release tarballs, the toolkit plus precompiled
builds of FC Tourmaline firmware:
Hello FreeCalypso community,
I just put out a new release of FC host tools:
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-r19.tar.bz2
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-latest.tar.bz2
(symlink)
and new official stable firmware builds for FreeCalypso
Hello GSM community,
I just put a new release of Themyscira GSM codec libraries and
utilities package:
ftp://ftp.freecalypso.org/pub/GSM/codecs/gsm-codec-lib-r2.tar.bz2
ftp://ftp.freecalypso.org/pub/GSM/codecs/gsm-codec-lib-latest.tar.bz2
(symlink)
The two libraries in this package (libgsmefr
Hi DS,
> Please have a look at https://www.freecalypso.org/members/ds/ccdgen.exe.c
> which is the result of the whole executable decompilation.
Is it from IDA or Ghidra? In either case, thank you for this point of
reference - it gives me an idea of what can be expected from the
existing tools.
Hello FreeCalypso community,
Do we have anyone here who is knowledgeable about the current state of
the art (and the state of readily available tools) in realm of static
reversing of Windows executable binaries? Right now I (and FC project)
could really benefit from a Windows binary decompiler -
I wrote a few days ago:
: In terms of other digital souvenirs from the cruise, I got some photos
: of me interacting with dolphins in a pool in Puerto Vallarta, and a
: short video my partner captured of me emerging from the Riptide water
: slide aboard the Navigator. I may post them a little
Hello FreeCalypso community,
I am back from my little cruise vacation, and here is my report on GSM
services:
* When we were in Cabo San Lucas and in Puerto Vallarta (the third
planned port call in Mazatlan got canceled because of an aviation
accident: a small plane crashed into the navigation
Hello GSM community,
I just pushed a private feature branch to osmo-bts, implementing a
feature of much interest to me:
https://cgit.osmocom.org/osmo-bts/log/?h=falconia/rtp_traulike
What is it all about? This document, contained inside the branch,
explains it all:
Hello GSM community,
I realize that most of you over in Osmocom land would much rather see
me submit Gerrit patches than write lengthy ML posts, but right now I
really need some help with the algorithmic logic of a feature before I
can develop patches implementing said feature - so please bear
Thank-you to Harald for capturing and publishing these files:
> Please see the pcap files in https://people.osmocom.org/laforge/pcap/
Here is my analysis, focusing on FR1 and EFR codecs in
osmobsc-nanobts-fr-dtx-dtmf.pcap and osmobsc-nanobts-efr-dtx.pcap - I
don't feel ready to look at AMR yet.
Hello GSM community,
Would anyone in either of the two sub-communities of GSM (OsmoCNI and
FC) happen to have a working setup with an ip.access nanoBTS,
specifically with working voice calls? For the purpose of this
inquiry, that "working setup" can be either with Osmocom CNI sw or
with whatever
Hi DS!
> An idea could be to use this recent feature from osmo-hlr:
> https://github.com/osmocom/osmo-hlr/commit/268a33e58b9de3a2a6d42f27b1b9542ffd42f584
>
> Currently, your wife's phone probably gets an "IMSI unknown in HLR"
> reject and I suppose the modem bugs after that, requiring a reboot.
Hello GSM community,
I am pleased to announce the first release of Themyscira GSM codec
libraries and utilities package:
ftp://ftp.freecalypso.org/pub/GSM/codecs/gsm-codec-lib-r1.tar.bz2
The two principal libraries contained in this package, libgsmefr and
libgsmfrp, continue the tradition that
Hello GSM community,
I have a question for those who operate their own GSM networks (be it
for fun or for research or for any other purpose) in places that DO
have regular commercial cell service, i.e., NOT ship-at-sea, middle of
desert or Rhizomatica-type environments: how do you deal with, and
Hello FreeCalypso community,
I just put out a new release of FC host tools:
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-r18.tar.bz2
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-latest.tar.bz2
As usual, the CHANGES file inside the tarball details all changes since
Hello fellow SIM tracers,
I just built this little gadget that allows one to observe (easily,
safely, non-invasively) what voltages each given phone puts out toward
the SIM:
https://www.freecalypso.org/members/falcon/pictures/SIM-volt-test/sim-fpc-pasv.jpeg
It is a trivial PCB adapter that
Hi Pau,
> https://datatracker.ietf.org/doc/html/rfc3267#section-4.3.2
> """
> Note that packets containing only NO_DATA frames SHOULD NOT be
> transmitted.
> """
Yes, I am fully aware of that callout in the RFCs (the newer RFC 4867
says the same), but it is a SHOULD NOT rather than a MUST NOT.
Hello GSM community,
As I keep working on my project seeking to build a new GSM network that
will be no worse in every aspect than the one which T-Mobile USA are
itching to shut down, I need a way to ferry the uplink voice stream
from the BTS to my "soft TRAU" in RTP transport, but do it in a way
Vadim Yanitskiy wrote:
> There exists a tool for flashing old Sony Ericsson phones called
> pstool (search for 'PSTool_SE_ODM_free' in your favorite search
> engine). It's a Windows executable with a custom GUI, and with some
> additional clarifications specifically for "big Russian specialists"
Hi Rafael,
> btw, I got a PinePhone for me... of course far from being a FC,
> but at least I can load a free firmware in the Quectel EG-25.
My primary personal phone, running on T-Mobile's not-yet-shut-down GSM
network is still Pirelli DP-L10 - still a blob with no ability to fix
bugs or make
Hi Rafael,
> If you want to test calls outsite +1, you can call me.
Are you still in +7, or are you back in +55? And do you have a SIP
destination to which I could route the call, without going through
traditional international toll carriers? The service provider I use
currently for PSTN
Hello FC community,
My Themyscira Wireless network setup is progressing along. The GSM
part is still mostly unchanged Osmocom CNI sw driving a sysmoBTS, but
my own add-on software that connects it to USA PSTN via a SIP trunk is
progressing quite well. Since my previous update, I now have both
Hello FreeCalypso community,
I've been silent for two and a half months, so it is time for an
update. I still haven't returned to working on the handset side of
GSM - I am still working on my own GSM network at home, whimsically
named Themyscira Wireless after the fictional paradise island of
Hello FC community,
I've been quiet here lately, so it's time for another update on my
work with GSM. I am still working on improving my toy GSM network at
home, making it feel more real - the big objective toward which I am
still working is interconnection with USA PSTN. I am currently
Hello FreeCalypso community,
As most of you probably know, our beloved TI Calypso platform dates
from the mid-2000s: the chipset of Calypso C035 DSP36 plus Iota ABB
plus Rita RF dates from 2004, whereas most commercial Calypso phones
(Mot C1xx, Pirelli DP-L10, Huawei and iWOW modules) date from
Das Signal wrote:
> Thank you for this update. Have you considered the use of an indoor
> directional antenna (such as a couple cheap yagis)? It could provide
> the necessary boost required to reach the meeting place you mention.
Thank you for the great idea! I knew about directional antennas,
Hi Denver,
> If one is concerned about group texting, for example,
> then BulkVS probably won't suffice.
What "they" (my philosophical enemies) call "group texting", I call
SMS abuse. AFAIK there is no straightforward way to block it outright
- after all, a GSM User Equipment implementation may
Hi Denver,
> You could try https://jmp.chat/ if you care about texting features
> (while calls use Jabber/XMPP by default, SIP is supported too).
>
> If you don't care about texting, then the cheapest numbers you will find
> are at https://bulkvs.com/ .
The way you worded it, are you saying that
Hi David!
> "pure bloods" as you amusingly describe your comrades :-)
I did not invent this term: at least in USA, in this country's
freedom-loving and bodily integrity community, the positive term
pureblood has become preferable to the negative term "unvaccinated".
Likewise with freebreather,
Hi DS,
> My main concern was that
> if you were to use eg. T-Mobile's 310-160, then other GSM phones
> with a T-Mobile issued SIM card would be at risk of inadvertently being
> connected, for example someone driving by.
Unless you or someone else on this list can present a strong argument
for a
Hi DS!
> About nanoBTS, be aware that they tend to transmit at fairly high power,
It is my understanding that the maximum power these units are capable
of putting out is 23 dBm. I live in a two-story building that has
been divided into 4 apartments, specifically in one of the two upstairs
Hello FreeCalypso community,
I am still alive and kickin'! The first update I have is a new release
of FC host tools:
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-r17.tar.bz2
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-latest.tar.bz2
The bulk of changes from the
Hello FreeCalypso community,
This post is a periodic update on what I am doing in the project.
Right now I am still working on designing our next development board
FC Venus, the one that will serve as a successor to FC Luna for
handset fw development purposes. Right now the schematic-level
Das Signal wrote:
> After doing the necessary soldering work and connecting the wires to the
> DUART28, here is the result of the fc-tmsh commands you listed:
I have analyzed these read results, and added the new data and analysis
to our freecalypso-reveng Hg repository - look under
Hello FreeCalypso community,
I got an update regarding one of the necessary accessory pieces for
our FC hardware solution: the special wired headset. I am working
with a Chinese manufacturer of wired headsets to produce a custom one
for FreeCalypso, a headset I named FC-HDS4. The key
Hi DS!
> I did solder fine wires (AWG30 probably?) on the back of a C118 phone that
> had all the pads connected, allowing be to test the JTAG and UART on this
> particular phone.
Were you able to reinsert the regular battery after adding those extra
wires, or did you have to implement some more
Hello FC community,
This post is an update on the audio mode-related work I am currently
doing in FreeCalypso, and I also have a little exercise which other
community members may be able to help with.
As far as audio mode work goes, I just put out a new audio mode config
for FCDEV3B, one that
Hello FreeCalypso community,
I got a new set of audio mode config files for FCDEV3B, for those
FCDEV3B users who got the loudspeaker+microphone voice call kit. The
new spkr0 audio mode config has AEC enabled (needed so that the party
on the other end of the call won't hear a delayed echo of
Hi David,
> sorry to admit that your last message is more interesting to me than your
> descriptions of technical endeavours, which are largely over my head,
My vision of FC community is not just technical, but also social.
Right now those of us who detest and refuse to use sheeple smartphones,
Hi David,
Nice to hear that you are still around!
> > and given that I live right next to USA-Mexico border and given
> > my ability to cross this border freely back and forth without being
> > subject to any Covidian cult rituals,
>
> So you live in Eden!
Well, the USA side of the border does
Hello FreeCalypso community,
I am still slowly trudging toward my dream goal of designing and
building my own FC Libre Dumbphone that would serve as a source-enabled
replacement for the Calypso-based but sans-source Pirelli DP-L10. The
purpose of this post is to share some updates on current
Hello FreeCalypso community,
Last week I got my gender confirmation surgery done at a Mexican
hospital, and I am now staying at a post-surgery recovery facility (a
place like an extended stay hotel, but with nurses looking after
patients) in Tijuana, the city in Mexico that is right next to the
Hello FreeCalypso community,
I just put out a new release of FC host tools:
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-r16.tar.bz2
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-latest.tar.bz2
If you never put on the hat of a developer, then the new additions in
Hello FreeCalypso community,
I got new compiled firmware releases for our FCDEV3B and Tango modems:
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fcdev3b/fcdev3b-prod-fw-20210811.tar.bz2
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/Tango/tango-modem-fw-20210811.tar.bz2
Compared to the last
Hello FC community,
Our dear Calypso includes a rather important feature called AEC:
Acoustic Echo Cancellation. If you have an FCDEV3B setup complete
with a loudspeaker and microphone and if you ever tried making voice
calls with it, you may have noticed the following quirk: while you
hear call
Hello FreeCalypso community,
It has been 8 months since our Tango-based Caramel2 boards became
publicly available, but so far no one other than me and Das Signal got
one of these boards.
I have also put out some additional documentation. Most of our
documentation for iWOW TR-800 and for our
Hello FreeCalypso community,
I just finished writing a very important document that details the
direction in which I am taking the project and what I am working on.
This document is the FreeCalypso Handset Specification, and it lives
here in Hg:
Hello FreeCalypso community,
It is time for me to post another update on what I am currently doing
in the project. My primary goal remains the same: right now I use a
Pirelli DP-L10 (running its original proprietary fw) as my personal
everyday phone, and I seek to replace it with my own phone,
Hi David,
> I think the statue will be Allan Ramsay.
Thank you for identifying it! I have read up on the subject, and as
it turns out, just to make matters more complicated for today's folks
trying to understand history, there were two different Allan Ramsays,
father and son, and apparently
Hello FreeCalypso community,
I am trudging along on our FC Tourmaline handset firmware:
https://www.freecalypso.org/hg/fc-tourmaline/
This firmware runs in its full glory (176x220 pixel color UI) only on
our Luna development platform, which consists of an LCD of the needed
large size connected
Hello FC community,
Our FreeCalypso Community SIM cards have now been fully produced
(getting ready to ship from China to California), and we got pretty
pictures:
https://www.freecalypso.org/members/falcon/pictures/SIMs/FCSIM1_front.jpeg
Hello FreeCalypso community,
I am pleased to announce the release of fc-host-tools-r15:
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-r15.tar.bz2
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-latest.tar.bz2
There are only two significant differences from the previous
Hello FreeCalypso community,
I am continuing active development of fc-simtool and its companion
utilities, our suite of tools for working with SIM cards. The program
purpose statement "working with SIM cards" includes all of the
following:
* Tinkering and experimenting with SIM cards directly
Hello FC community,
I finally have a share-worthy update on my quest to get programmable
SIM cards (for running our own GSM networks) that are GSM-centric,
rather than newer-tech-centric. Earlier today I received the sample
cards from Grcard in China, the ones I've been anxiously waiting for
Hello FreeCalypso community,
Just a quick note to let everyone know what I am working on these
days: I am continuing to further develop my fc-simtool utility for
manipulating (reading and writing) SIM cards. This utility began its
life about a month ago in the freecalypso-hwlab repository, but
Hello FC community,
I am pleased to introduce a new FreeCalypso tool: fc-simtool. This
program runs on a general-purpose computer (PC/laptop/etc) equipped
with a smart card "reader" device like the HID Omnikey readers sold by
Sysmocom, and it talks to a SIM card inserted into that "reader"
Hello FreeCalypso community,
Happy New Year to everyone!
I don't know if I am the world's only GSM/2G-interested person who
also happens to live in USA, or if there are any other GSM/2G users
living in these lands - but if you are someone who cares about GSM and
you live in USA, you know that
Hello again everyone,
This explanatory update will probably only be useful to DS as he is
the only person on the planet besides me at the present moment who has
the necessary hardware, but others may find it educational, so here it
goes...
FC Tourmaline firmware has two Luna build targets: luna1
Hi DS!
> This is excellent news! Congratulations of the successful production of
> this new board :-) Do you think you could perhaps post a couple pictures
> of the board in action (such as with the LCD and keypad connected)?
My photography skills are pretty much non-existent (I am a programmer
Hello FreeCalypso community,
I got a new release of FC host tools:
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-r14.tar.bz2
ftp://ftp.freecalypso.org/pub/GSM/FreeCalypso/fc-host-tools-latest.tar.bz2
(the latter URL is a symlink that has been updated to point to the former)
This
Hi David,
> So for the little phone use I do, I now have a as yet unliberated C139.
So what happens when you give someone your mobile number and they turn
around and betray that trust by sending you MMS? How does Motorola's
official C139 fw behave when faced with a hostile act of someone
Hi Rafael,
> I really appreciate the recent FreeCalypso developments, and I'm really
> looking forward for the first free/libre mobile phone on Earth!
One important correction: the phone which I seek to build won't be the
first libre mobile phone on Earth, instead it will be the second - the
Hello FC community,
Although our Caramel2 boards are not in the state of final assembly
yet, I do have a picture of a partially assembled C2 board which I can
share:
https://www.freecalypso.org/members/falcon/Caramel2/c2-partially-assembled.jpeg
On this partially assembled board the Tango
Hello FreeCalypso community,
I got a little bit of news on FC hardware: our Caramel2 boards have
cleared the first assembly stage and are ready to enter the second and
final assembly stage in which they will be outfitted with Tango
modules and the necessary RF plumbing. At the present moment it
Hi David!
> Is a sort of halfway house a possibility - a new FC board to replace the
> guts of a pirelli or C139? Come to that, the case does not need to be that of
> a model which originally used the calypso chip, any model commonly available
> second hand with fairly decent plastic ware.
Oh
Hello FC community,
I have just created a new FreeCalypso firmware source tree named
FC Tourmaline:
https://www.freecalypso.org/hg/fc-tourmaline/
FC Tourmaline is our fourth firmware offering after Citrine, Magnetite
and Selenite, and it is intended for phone handset UI development.
As I see
Hello FreeCalypso community,
Almost a year ago in December of 2019 I discovered the existence of
these very obscure historical GSM/GPRS modem modules that have our
beloved Calypso chipset inside:
https://www.iwow.com.sg/downloads/tr-800-module/
For the past 10 months we (FreeCalypso core team
Hello FreeCalypso community,
I just snapped some pictures of our new DUART28 adapter:
https://www.freecalypso.org/members/falcon/pictures/duart28/
The set includes front and back views of the DUART28 board itself,
plus a picture showing how the new adapter connects to our FCDEV3B.
This DUART28
Hello again everyone,
We just made another step toward the new FreeCalypso hw that was
announced in my previous post: earlier today the batch of 20 fully
assembled DUART28 boards arrived at FreeCalypso HQ. DUART28 is an
adapter from USB to two Calypso UARTs, taking the place of our
previous
Hello FreeCalypso community,
I've been quiet over the past few months as I've been working on some
new additions to our FC hardware family. Hopefully soon there will be
two new additions to our family:
1) There exists a certain historically-made Calypso modem module
conceptually similar to
Hello again everyone,
In addition to the USB to dual UART adapter covered in my previous post,
the other accessory needed for working with FCDEV3B boards is a 3.6 VDC
power supply. It seems that most GSM modem evaluation boards (for
GTM900 etc) made by parties other than TI and FreeCalypso
Hello FreeCalypso community,
If someone wishes to use their Mot C139 or C140 as an end user phone,
but the unit they got came with carrier branding and won't accept
arbitrary SIMs, what can they do? While our own FreeCalypso handset
firmware is still far away, the current solution is to reflash
Hello FC community,
I just solved the long-standing mystery of where and how the original
factory IMEI is stored on Compal phones. As it turns out, their IMEI
is not stored in the main flash memory array at all, i.e., it does NOT
live in the same "vital records" flash sector as RF calibration
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