mictronics/ais-simulator

Create and transmit AIS frames via gnuradio toolchain and web application in browser. Provides a websocket to PDU message block to change frame content on runtime. Works in burst mode, a frame is send on change immediately, one time. Transmitter remains silent until next change event.

ais-simulator's Issues

Segmentation Fault

I have a Segmentation fault every time I try to send a message. The web app runs well, and I get a "Message sent" message upon sending.

Output :
axel@debian:~/Documents/AIS/ais-simulator$ python3 ais-simulator.py
gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.8.2.0
built-in sink types: uhd hackrf bladerf soapy redpitaya freesrp file
[INFO] [UHD] linux; GNU C++ version 10.2.1 20201207; Boost_107400; UHD_3.15.0.0-4+b1
Using HackRF One with firmware 2018.01.1
UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUSegmentation fault

System:

• Debian 11
• Gnuradio 3.8.2.0-14
• python 3.9.2
• gr-ais_simulator blocks installed using ../cmake ; make ; sudo make install

PDU message length incorrect between blocks

PDU message length sent by websocket block not equal (shorter) to what is received in bitstream block. It seems there is a problem in the PDU message code (in GnuRadio). Reproducible with large number of messages (type 5) being send.
Seems we need to tell the bitstream block what length is expected and not rely on what is received.

Stack smashing detected

Stack gets smashed when many messages are send. Depends on message size, happens faster with long messages, like type 5.

AIS payload 168 bit or 256 bit - NRZI string

Hi,
The Variable ID sentence in the grc file holds 168 bit payload but AIS specifications says it to be 256 bits.
My Questions for better understanding are following, might be everything is already there but i am not getting it.

1. Does 168 bits contains encoded payload only or AVDM also encoded in these bits? if not then where AVDM is encoded?
2. Where is the NRZI generator? since GMSK modulator for AIS requires bipolar (-1 , 1) NRZI values ?

Thanks

Problem when trying to transpile the .ts files

Hi,
Can you please guide me on transpiling procedure. Are their any dependencies?

Simulator of the 27th type of messages

Hi! When modeling a type 27 message, the decoder determines that the message is of type 1. Also, some fields are spoiling.

ais-simulator/webapp/assets/aivdm_encoder.js

Lines 393 to 394 in d905de9

	static encodeMsgType27(mmsi, status, speed, course, lat, lon) {
	const header = this.getMsgHeader(1, mmsi, 3);

Solution:

static encodeMsgType27(mmsi, status, speed, course, lat, lon) {
            const header = this.getMsgHeader(27, mmsi, 3);

Problems ,when trying to install it on linux gentoo , custom blocks for GnuRadio 3.10.4.0 (from AIS Simulator).

Hi, I am very interesting to install that AIS-SIMULATOR,

I am running pentoo distro , (gentoo linux including a vaste of excellent packages )

• Currently my main related installation is the following one :
• python --version ==> Python 3.10.8
• kernel version , ==> linux-6.0.9-pentoo
• GNU Radio Companion ==> ,3.10.4.0 (Python 3.10.8)

Trying to install your specific AISTX blocks i tried to follow your instructions , changing python 3.8 -> 3.10, and almost all worked well
except that part :

CMake Error at swig/CMakeLists.txt:37 (include):
include could not find requested file:

GrSwig

CMake Error at swig/CMakeLists.txt:51 (GR_SWIG_MAKE):
Unknown CMake command "GR_SWIG_MAKE".

Just in case, let me share below , the full command and display echo ,

Any help or clue would be appreciated !
thanks in advance ,
Cheers,

.----------------------------------------------

pentoo@pentoo ~/Documents/ais-simulator-master/gr-ais_simulator/build $ cmake ../ -Wno-dev -DPYTHON_EXECUTABLE:FILEPATH=/usr/bin/python3.10 -DPYTHON_INCLUDE_DIR:PATH=/usr/include/python3.10 -DPYTHON_LIBRARY:FILEPATH=/usr/lib/x86_64-linux-gnu/libpython3.10.so

-- The CXX compiler identification is GNU 11.3.0
-- The C compiler identification is GNU 11.3.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Build type not specified: defaulting to release.
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE
-- Found PkgConfig: /usr/bin/pkg-config (found version "1.8.0")
-- Checking for module 'gmp'
-- Found gmp, version 6.2.1
-- Found GMP: /usr/lib64/libgmpxx.so
-- Using GMP.
-- Found MPLIB: /usr/lib64/libgmpxx.so
-- Found Boost: /usr/lib64/cmake/Boost-1.80.0/BoostConfig.cmake (found suitable version "1.80.0", minimum required is "1.79.0") found components: date_time program_options system regex thread
-- Found Volk: Volk::volk
-- User set python executable /usr/bin/python3.10
-- Found PythonInterp: /usr/bin/python3.10 (found version "3.10.8")
-- Found PythonLibs: /usr/lib/x86_64-linux-gnu/libpython3.10.so (found suitable exact version "3.10.8")
-- Found Git: /usr/bin/git
-- Found Doxygen: /usr/bin/doxygen (found version "1.9.5") found components: doxygen dot
-- Using install prefix: /usr/local
-- Building for version: v1.0-compat-xxx-xunknown / 1.0.0git
-- No C++ unit tests... skipping
-- Found SWIG: /usr/bin/swig (found version "4.0.2")
-- Found PythonLibs: /usr/lib/x86_64-linux-gnu/libpython3.10.so (found version "3.10.8")

CMake Error at swig/CMakeLists.txt:37 (include):
include could not find requested file:
GrSwig

CMake Error at swig/CMakeLists.txt:51 (GR_SWIG_MAKE):
Unknown CMake command "GR_SWIG_MAKE".

-- Configuring incomplete, errors occurred!
See also "/home/pentoo/Documents/ais-simulator-master/gr-ais_simulator/build/CMakeFiles/CMakeOutput.log".