Name Modified Size Downloads / Week Status
README2 2017-01-08 23.6 kB 44 weekly downloads
README3 2017-01-08 7.1 kB 11 weekly downloads
README 2017-01-08 9.0 kB 44 weekly downloads
jcEdit.py 2017-01-08 11.0 kB 55 weekly downloads
UPDATES 2016-01-10 24.3 kB 11 weekly downloads
jcblockAT.c 2016-01-10 39.3 kB 44 weekly downloads
common.h 2015-06-25 1.2 kB 22 weekly downloads
makejcblockAT 2015-06-12 175 Bytes 11 weekly downloads
startjcblockAT 2015-06-12 859 Bytes 11 weekly downloads
jcblock.c 2015-04-14 40.2 kB 22 weekly downloads
truncate.c 2015-04-14 16.6 kB 11 weekly downloads
tones.c 2015-04-14 13.7 kB 11 weekly downloads
tonesRPi.c 2015-04-14 14.1 kB 11 weekly downloads
startjcblock 2015-01-25 3.6 kB 11 weekly downloads
radio.c 2014-04-29 5.7 kB 11 weekly downloads
radio.h 2014-04-29 1.2 kB 11 weekly downloads
radioclient.py 2014-04-29 2.0 kB 11 weekly downloads
makejcblock 2014-04-29 196 Bytes 11 weekly downloads
blacklist.dat.example 2014-03-06 2.5 kB 11 weekly downloads
whitelist.dat.example 2014-03-06 966 Bytes 11 weekly downloads
callerID.dat.example 2010-09-19 1.2 kB 11 weekly downloads
Totals: 21 Items   218.5 kB 36
Program: jcblock A program to block telemarketing (junk) calls. FILE CONTENTS: This file contains information related to running the jcblock program on a Raspberry Pi processor using various modem models. The present preferred modem choice is the Sewell (previously called the ATian) modem. Search for 'Sewell' in this file for details. The jcblock program, itself, is described in file README. NOTE: See the RECENT ACTIVITY section (below) for changes. 23 November 2014: Raspberry Pi System with TRENDnet modem --------------------------------------------------------- A site photo shows a Raspberry Pi B+ processor (~$35) with a TRENDnet TFM-561U modem (~$25). This represents a minimal system for running the program. The program's tones feature is not operable (the tones feature allows the operator to press the *-key on a touchtone phone to automatically generate a blacklist entry for the call). The FAX tone feature is also not available (this feature causes a FAX tone to be sent to the caller to fool them into thinking they have reached a FAX machine). The program must therefore be compiled with precompiler flags DO_TONES and DO_FAX_TONE commented out. To compile the program for this hardware configuration edit the makejcblock file to contain a compile command that looks like this: gcc -o jcblock jcblock.c truncate.c -ldl -lm The program will then compile on the Pi. You will need to determine the USB device that the Pi assigns to the TFM when it is plugged in. I find that the easiest way to do this is to list the /dev/tty* device IDs with and without the device installed. You will see a new device when it is plugged in. It will probably be ttyACM0. So the command to run jcblock would then be: ./jcblock -p /dev/ttyACM0 When you first run the Pi you will need to configure the system. In addition to text presented when the system boots, there is a README file for another of my projects, jablock, on SourceForge that goes into considerable detail on this subject. There are also several excellent tutorials on the web. OPERATION: The TFM-561U modem delivers caller ID data that is consistent with USA/Canada telephone systems. Unfortunately there is no worldwide standard caller ID format. There are three major standards: 1) Bellcore (USA, Canada, etc.), 2) DTMF (parts of Europe, etc.) and ETSI (other parts of Europe, etc.). For details search the web for 'caller ID'. Here is an example source: http://www.ainslie.org.uk/callerid.htm The TFM-561U uses the Bellcore format. It may be possible to install a caller ID converter that converts DTMF or ETSI formats to Bellcore (a "box" that goes in the phone line before the TFM). Search for 'caller ID converter'. Here is a reference to an EM3100 unit (also check ebay): http://www.aliexpress.com/popular/caller-id-converter.html I do not know if these units solve the problem (since I do not have access to non-US phone systems!). If you try one, I would greatly appreciate hearing from you (at: walmarheath@comcast.net or add a topic to the site's Discussion menu area). 29 November 2014: Raspberry Pi System with USR5637 modem --------------------------------------------------------- A site photo shows a Raspberry Pi processor (~$35) with a USRobotics USR5637 modem (~$50). As for the TFM system, the program's tone feature is not operable. The FAX tone feature is also not operable. The program must therefore be compiled with DO_TONES and DO_FAX_TONE commented out. In addition, the program cannot use the "DTR trick" to cancel calls (see UPDATES for details). Instead, it uses the off-hook/on-hook method. To activate this, DO_USR5637_MODEM must be uncommented. However, unlike the USR5686G modem, this modem does accept country codes (see below). So there is the possibility that the caller ID format issue discussed above has been solved within the modem (if you have experience with this, I would very much like to hear from you!). The instructions for compiling and running the program are the same as for the TFM system above. 22 January 2015: Raspberry Pi System with USR5686G modem ------------------------------------------------------- Note: site photos for this system were removed to make room for photos of newer systems. Site photos show a Raspberry Pi Model B+ processor (~$35) with a USRobotics 5686G modem (~$90) and a Cirrus Logic Audio Card (a.k.a., Wolfson Audio Card+, ~$40). This system implements the entire jcblock system. The audio card provides a microphone (mic) interface to the RPi. Audio tones produced by pressing the asterisk (*) key are detected by the mic and processed to place an entry for the call in the blacklist (see the README file for details). The mic on a Skulcandy INKD "ear buds" headset (Radio Shack, ~$24) is used. The unit is housed in an inverted storage box, which shields the RPi from static discharge (we have cats!), concentrates modem speaker sound around the mic and shields the mic from room noise. Compilation: There were enough program changes to the tones.c file to warrant a separate file, tonesRPi.c, for the RPi version. So the tones.c file in makejcblock should be replaced with tonesRPi.c. Also, make sure the DO_TONES preprocessor define in jcblock.c is uncommented. To compile this program libasound2-dev must be installed. To do this the RPi must be connected to the Internet. Then run: $sudo su #apt-get update #apt-get install libasound2-dev The makejcblock script should then compile the program. Audio Card: The audio card is described at (one line URL): http://www.element14.com/community/community/raspberry-pi/ raspberry-pi-accessories/cirrus_logic_audio_card A User Manual may be downloaded. The card provides interfaces to multiple audio devices. This project uses the analog headset interface only. Device drivers for the card are not yet part of the Raspian package, so they must be installed. The manual indicates that there are two choices: 1) download and install an entire Linux microSD card image (Method A), 2) install an updated kernel containing the needed drivers (Method B). If you have not yet installed Raspian, I would recommend Method A, since you will then also find the "Use Case" configuration scripts in directory /home/pi. These are not available using Method B. The scripts are not strictly necessary for this project, since I have copied (and modified) parts to start-up script: startjcblock. The image may be installed on a microSD card using the procedure described here (one line URL): http://www.raspberrypi.org/documentation/installation/ installing-images/linux.md Be careful with the 'dd' operation in this procedure! If you choose to just install the drivers (Method B), You will not need the Use Case scripts for this project, since script startjcblock contains all that is needed. The manual describes the Use Case scripts. Image Configuration Tips: If you install the Method A image on a microSD card, and install it in an RPi, it should boot on a system with display (TV), keyboard and mouse. If you are not in the UK one change you will want to make immediately is to set the default keyboard. If you start a LXTerminal and press the '#' key you see a British pound (currency) symbol, edit /etc/default/keyboard and change XKBLAOUT='gb' to indicate your locale (e.g., 'us' for the US). I also changed the default editor by adding line: export EDITOR=/usr/bin/vi (or your choice of editor) to the end of the .bashrc file in /home/pi. Then reboot. At this point you will probably want to make other configuration changes: $sudo su #raspi-config This will display the initial configuration menu that the Raspian installation displays. The raspi-config utility presents menus using an ncurses GUI. Some general rules for navigating the menus are as follows: 1) to move up or down a menu list use the up/down arrows, 2) to select an item, press the Enter key, 3) to toggle an entry, use the Space bar, 4) to select an option at the bottom of a menu, press the left or right arrows (some times multiple times!), 5) to exit the utility, press the Esc key. Under Advanced Options, you will want to activate SSH. This will start its daemon so you can ssh in remotely. Make other changes as you see fit. Startup Script: File startjcblock is available at the web site. This may be run to start jcblock. It must be made executable: $chmod +x startjcblock The file starts with a (modified) version of the Use Case Reset_paths.sh file. The second part is a (modified) version of the Record_from_Headset.sh file. Among other operations it sets the mic volume to 48 (max). The script then changes to the directory of the jcblock program: cd /home/pi/<yourPath> You will need to substitute your path here. It then starts jcblock running in the background (the &). It is important that it run in the background so that the script can continue. The rest of the script has to do with shutdown and will be discussed in the next section. It is convenient to have the startjcblock script run automatically when the RPi boots. Normally scripts that must run at startup are placed in /etc/init.d and soft links are made to them in directories rcN.d, where N is the run level. These scripts run at root level. But we would like our script to run at user level. There is a feature of the cron utility, called @reboot, that will do this. When a RPi user uses the cron utility a file is created: /var/spool/cron/crontabs/pi to hold the user commands. The best way to edit this file is to run: $crontab -e The file will be opened using the RPi user's default editor. Enter the following line at the end of the file: @reboot /home/pi/<yourPath>/startjcblock & WARNING! Don't forget the '&'! It causes the script to be run in a forked off separate process -- so that the boot process can continue. Without it the boot process will stall in the script! If this happens to you, refer to section BOOT HANG RECOVERY: below. There are other useful crontab options: crontab -l lists entries; crontab -r removes entries. See its man page for details. Shutdown: The lower part of the startjcblock script provides a way to shut down the RPi (i.e., run: shutdown -h now) without having to enter the command in a terminal window. It uses a package called usbmount that automaticlly mounts a USB flash memory stick on a fixed mount point when the stick is inserted. The package is installed using: #apt-get install usbmount To confirm installation, enter: #df -h Then insert a USB flash memory stick (one with a vfat file system on it) and enter the above command again. The drive should appear mounted on /media/usb0. That insertion may be used to initiate shutdown. The startjcblock script runs a while loop that contains a test for directory shutdownDir on a flash memory stick mounted on /media/usb0. If the directory is present, the shutdown process is started. After the process is started, wait for the RPi green LED (memory access) to stop blinking before turning power off. To make this work it is necessary to create directory shutdownDir on a USB memory stick. With the stick mounted enter: $mkdir shutdownDir I have found that usbmount will mount a memory stick that contains a vfat file system (as originally formatted). I had no luck getting sticks with other file systems to work. With automatic startup and memory stick shutdown, the system may be run "headless" -- that is, without display, keyboard or mouse. Although unexpected power loss does not seem to cause damage, it is prudent to run the system with a power source that is UPS protected so that if power fails, there will be time to bring the system down properly. Note that for systems that do not contain the audio card, the startjcblock script may be used if the audio card configuration statements are removed. Operation: As indicated in the system photos, the mic needs to be mounted in a fixed location above the modem speaker. There is a volume control on the left side of the unit. I have mine set at half volume. You may need to coordinate the mount position and this setting with the THRESHOLD value in the tonesRPi.c file to get acceptable detection results. 12 March, 2016: Raspberry Pi System with Sewell Voice/FAX Modem ------------------------------------------------------------- The Sewell modem (~$17, available at Amazon.com) implements all hardware functions needed by the program, including touchtone detection. Therefore all features of the program are available with this modem. The touchtone function is used to detect a *-key press. When the program is in the *-key detection window, pressing the key causes a record for the call to be automatically written to the blacklist. The window opens when the listener hears some "clicks". The listener then has ten seconds to press the *-key. The window opens about seven seconds after the last received ring. Since this modem required a fair number of program changes, a separate source file was written. The new files needed for this program are: jcblockAT.c, makejcblockAT and startjcblockAT. The program uses POSIX threads (pthreads), so gcc compile option -pthread is required in the makejcblockAT file. The pthread library is available by default on the RPi. The modem: The Sewell modem comes with no documentation. It is a voice modem and some voice AT commands were needed to activate the touchtone feature. I was able to find a Cisco document containing AT voice commands that was sufficient at (a one-line URL): http://www.cisco.com/c/en/us/td/docs/routers/access/modem/ AT/wic/command/reference/atwic/atwic6.html Not all the commands in the document work, but the ones used in the program are described in the document. You can experiment with AT commands using miniterm.py. See an entry under the Documentation menu of this site for details. Startup/Shutdown: You may want to use startjcblockAT to start and shutdown jcblockAT. See the writeups above under: Startup Script: and Shutdown: for the similar script: startjcblock. Platform: I am running the program on a Raspberry Pi Model B+ processor. But I developed and ran it on my Dell desktop. No changes were required to run it on the RPi, so it will probably run on other RPi models without changes. At most maybe some of the usleep() delays will need to be adjusted. Keep in mind that we are using a modem in an application for which it was not designed. -------------------------For all systems ---------------------- ETHERNET SETUP: I did most of my work with the RPi disconnected from the TV and, instead, accessed over an Ethernet connection using ssh. To set up the connection I edited file /etc/network/interfaces. Since I prefer to use static connections for wired links I commented out line: 'iface eth0 inet dhcp' and added the following lines at the end of the file: iface eth0 inet static address netmask gateway where the address was a free static address available from my router and the router gateway address is Then on my desktop workstation I added the following line to file /etc/hosts: raspi After rebooting, I could then log into the RPi using: $ssh pi@raspi The RPi asks for the password (by default: raspberry). If you want to have a secure connection (and not have to enter a password), and you have an RSA public key in your .ssh/id_rsa.pub file, you can copy and paste it into file .ssh/authorized_keys on the RPI (you will have to create directory /home/pi/.ssh first). If you don't yet have keys in your workstation .ssh directory you can generate them with command ssh-keygen (see the man page or an online tutorial). It is convenient to be able to run an X11 client on the RPi and have it displayed by the X11 server on your workstation. To do this the RPi file /etc/ssh/sshd_config must contain these lines: X11Forwarding yes X11DisplayOffset 10 After rebooting, you should be able to remotely log in with: ssh -X pi@raspi and run X11 clients. At this point you should be able to transfer files to the RPi with: $scp <filename> pi@raspi:/home/pi and from the RPi with: $scp pi@raspi:/home/pi/<filename> . BOOT HANG RECOVERY: As indicated above, it is possible to hang the boot sequence if the startjcblock script is not constructed and called properly. If this happens, the only solution is to remove the SD card and mount it on another computer where corrections can be made. A USB card reader is needed. Once the card is mounted, all files will be accessible and you will be able to make corrections. COUNTRY CODES: Some modems require a country code that is specific for the country of operation. The jcblock.c program contains a pre- processor define, DO_COUNTRY_CODE, which may be uncommented to send a code to the modem. It does this by sending modem command: "AT+GCI=XX\r", where XX is the country code. Here is a list of available country codes: Australia 09 India 53 Philippines 89 Austria 0A Indonesia 54 Portugal 8B Belgium 0F Ireland 57 Singspore 9C Canada 20 Italy 59 South Africa 9F Denmark 31 Japan 00 Spain A0 Europe 72 Korea 61 Sweden A5 Finland 3C Malaysia 6C Switzerland A6 France 3D Mexico 73 Thailand A9 Germany 04 or 42 Netherlands 7B Turkey AE Greece 46 New Zeland 7E United Kingdom B4 Hong Kong 50 Norway 82 United States B5 Hungary 51 China 26 Vietnam BC Note that, as indicated for the TFM-561U modem, this may not be the only change needed to get the program to work with a specific country's telephone system. In fact, it is not clear what the country code actually does! So this may or may not help. The experience of one user in Italy is that it did not solve the caller ID format problem for his TFM system. RECENT ACTIVITY: 01 December, 2014: Way to make the TFM_561U send the fax tone. -------------------------------------------------------------- If you uncomment define DO_FAX_TONE and replace statement: send_modem_command(fd,"AT+FCLASS=2.0\r"); with send_modem_command(fd,"AT+FCLASS=0\r"); the modem will send the fax tone (the caller will hear it). I don't know why! This is just something I stumbled onto. This does not work for the USR5637 modem. 13 March, 2015: jcblock.c correction; THRESHOLD change. ------------------------------------------------------- If you are not using the *-key feature (DO_TONES is disabled), this change does not affect you. Occasionally on the full function (USR5686G modem) system the first "off hook" command: send_modem_command(fd, "ATH1\r"); // off hook returns: did not get command OK I have added a quarter-second delay after the preceeding open_port() call: open_port( OPEN_PORT_BLOCKED ); usleep( 250000 ); // quarter second I "think" this will solve the problem, but can't be sure until I get sufficient calls. Since this could take a month or two (we only get 0-2 junk calls/day now), I thought I would submit the change in case others are seeing the same symptom. The program runs fine without the fix on the ebox system. Since the RPi is faster and the two systems are using the same modem, I am speculating that it is a timing problem. If I find out otherwise I will submit a correction. Recently I also changed the value of THRESHOLD in tonesRPi.c from 0.5 to 1.5 on my system. As noted earlier, this is a "tuning" parameter and its best value depends on the hardware configuration of your mic, modem speaker volume, enclosure, etc. You will need to adjust it for your own system. As a consequence I am not submitting a tonesRPI.c file change. 14 April, 2015: jcblock runs on a Mac; general cleanup. ------------------------------------------------------- A user reported that he has jcblock running on a Mac. He compiled it using a C99 compiler (ISO 9899:1999) and it ran immediately. The only difficulty was in determining the serial port: ./jcblock -p /dev/tty.usbmodem24680241 This is a version with the *-key feature disabled (DO_TONES is commented out). The *-key feature requires the libasound ALSA (Advanced Linux Sound Architecture) library, which (probably) is not available on the Mac. He also mentioned that the compiler spit out some non-fatal warnings, so I decided to check the posted files for them. I did this by adding option -Wall to the gcc command in file makejcblock. Files jcblock.c, truncate.c, tones.c tonesRPi.c required changes. I have uploaded these corrected files. No functional change in program operation was involved, so you may wish to ignore these changes. Another user has ported jcblock to the Python language. The above (13 March, 2015) addition of: usleep( 250000 ); // quarter second seems to have fixed that problem, so it is now part of the posted tonesRPi.c file. 09 June, 2015: jcblock version for ATian voice/FAX modem. --------------------------------------------------------- Submitted a separate version (jcblockAT.c) for the ATian modem. See the write-up above. 12 March, 2016: Revised jcblockAT documentation above. ------------------------------------------------------ If you have been following this project for awhile you will know that I had some considerable trouble with itermittent operation of the jcblockAT program. At that time I had the ATian modem mounted on a board with the modem USB cable "pinched" tight. Later I changed to a second ATian modem that was unmounted. That system has run continuously without a fault for over two months. Therefore the problem was either: 1) a faulty first modem (unlikely), or 2) a "pinched" USB cable (likely). Lesson learned: don't "pinch" the USB cable! Since this system: ATian modem/RPi/jcblockAT implements all features of the program reliably, It is now the preferred design. I revised the ATian documentation above to reflect these results. 08 May, 2016: ATian modem replaced with Sewell modem ---------------------------------------------------- Well, just when I got everything working, a user reported that the ATian modem is no longer available at Amazon.com! But the same modem is available from a company called Sewell. If you do a google search on 'Sewell voice/FAX modem' you will find a link to it. It operates the same as the ATian. Also, you will find a link to an offer from Amazon.com for the Sewell modem. Here is a link directly to the Sewell modem: https://sewelldirect.com/voicefax-56k-usb-modem-two-jacks- 06 June, 2016: Web-based interface to jcblock --------------------------------------------- Don Cross sent me a description of a web-based graphical user interface for jcblock. I have not yet tried it but it looks very powerful. He has made a web site for it at: https://github.com/cosinekitty/jcadmin The site has screen shots and a good description. It uses Node.js, which is a system for running JavaScript programs using Google's JavaScript engine (called "V8"). He uses it to create a web server called jcadmin that runs on the system running jcblock. Client logic, jcclient.js, runs on the user's browser system (which can be an iPhone or other cell phone display) and talks to jcadmin.js using AJAX. Responses come back in JSON format. It is able to display call data dynamically as calls come in!
Source: README2, updated 2017-01-08

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