#J1939
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mustard.party
J1939+2134 is the Ceiling Cat of millisecond pulsars
September 3, 2023 at 10:50 PM
aardgoose.info
A useful summary where just the basics are poor. The CAN bus. Like early internet protocols, security wasn't designed in.

jcom1939.com/security-con...
Security Concerns in CAN, CANopen, and J1939 Networks - JCOM1939 Monitor Pro
Explore data security risks in Controller Area Network (CAN), CANopen, and SAE J1939 systems. Learn about real-world hacking examples in automotive, medical, industrial, and diesel networks, plus the ...
jcom1939.com
February 26, 2026 at 10:06 AM
arduinolibs.bsky.social
SimpleJ1939 (0.0.3) by Victor Chavez

➡️ https://github.com/vChavezB/SimpleJ1939

Simple J1939 CAN library.

#ArduinoLibraries #ArduinoLibs
GitHub - vChavezB/SimpleJ1939: A simple j1939 communication library for Arduino
A simple j1939 communication library for Arduino. Contribute to vChavezB/SimpleJ1939 development by creating an account on GitHub.
github.com
September 19, 2025 at 7:35 PM
jasoncdaniels.bsky.social
While I've only ever tinkered with a couple boards (Arduinos, STM32 Nucleo lines) I did recently resign from a massive international industrial components vendor. And all our devices had MCUs w/ code CRCs checks. And we implemented protocol specific safety mechanisms (J1939, CANopen...etc).
2/3
August 30, 2025 at 3:23 PM
it4sec.bsky.social
Hacking ECU of heavy-duty vehicles (trucks, buses, etc.): How to attack the J1939 protocol at scale. 🚜🔧👨🏻‍💻🦠🎉

More details on:
LinkedIn: www.linkedin.com/posts/dlasko...
Substack: it4sec.substack.com/p/hacking-ec...
April 4, 2026 at 7:36 PM
it4sec.bsky.social
Networks in supertrucks and heavy vehicles: introduction to SAE J1939 and SAE J1708/J1587, tools you can buy and attacks you can try. 🚛💉👨‍💻🔥

More details on:
LinkedIn: www.linkedin.com/posts/dlasko...
Substack: it4sec.substack.com/p/networks-i...
June 28, 2025 at 4:00 PM
coyoteden.bsky.social
Ahahaha that’s what I mostly do now, you’d be surprised when SAE J1939 was standardized.

…wait, 2013? Thought it was older. How the hell did big rigs work before there was a standard for this shit? It’s bad enough as it is.
September 26, 2025 at 3:37 AM
imbecillicus.rex.lol
Introduce yourself with some jobs you have done apart from what you do now:

Babysitting hourly-rental gaming computers
Answering phone calls about how to fix TiVos
Operating a one-hour photo lab in a drugstore
Building a testbed for running malicious python code with access to a J1939 network
fatherhilarious.blog Graeme 🦋 @fatherhilarious.blog · Nov 7
Introduce yourself with some jobs you have done apart from what you do now:

Photographing radioactive DNA
Selling beer
Testing drugs
Helping people with laboratory software
Selling expensive stuff to laboratories
Genetic screening of baby humans in the womb
... And now I'm a priest.
Lol.
latimeriidae.bsky.social Mike (beep boop era) @latimeriidae.bsky.social · Nov 7
Introduce yourself with some jobs you have done apart from what you do now:

Landscaper
Engraver
Military
Electrical engineer
Biomedical engineer
Vision lab nerd
Wrote about the civil war a bunch
Bike shop and middling racer
Rural internet benefit and subsidy person
Mental health peer support
November 7, 2024 at 3:30 PM
auroraobd2.bsky.social
Take control of your yellow fleet.

The CAT ET3 (Caterpillar Electronic Technician) is the industry-standard interface for anyone who refuses to wait 3 days for a dealer service truck. Get factory-level access to your engines, excavators, and generators.
www.obd2.ltd/goods-113-CA...
✅ Dealer-Level Access: Perform cylinder cutouts, injector calibrations, and sensor resets. ✅ High-Speed Flashing: Fast ECM updates across J1939 and CAT Data Link. ✅ 2024A Software: The latest diagnostic coverage for Tier 4 Final and beyond. Stop paying "gatekeeper" fees. Fix it yourself.
April 9, 2026 at 3:13 AM
canadiancl.bsky.social
The Heavy-Duty Reality: Why I Stay Put as a 310T Technician (And Why More People Need to Join the Trade)

There is a unique kind of satisfaction that comes with sitting in the cab of a fully loaded Class 8 tractor-trailer, turning the ignition key, and hearing a massive diesel engine roar perfectly…
The Heavy-Duty Reality: Why I Stay Put as a 310T Technician (And Why More People Need to Join the Trade)
There is a unique kind of satisfaction that comes with sitting in the cab of a fully loaded Class 8 tractor-trailer, turning the ignition key, and hearing a massive diesel engine roar perfectly to life. If you are the person who diagnosed the complex electrical fault, tore down the top end, or tracked down a ghost in the J1939 ECU network, that sound is pure validation.
canadiancountrylife.ca
May 26, 2026 at 11:01 AM
birbulent.bsky.social
Building practical engineering tools for real-world problems. ⚙️

ALGO TEAM brings together CAN Bus & J1939 tools, DBC utilities, engineering simulators…
🔗 algo-team.com

#Engineering #CANBus #J1939 #EmbeddedSystems #AutomotiveEngineering #OffHighway #MechanicalEngineering #ElectricalEngineering
Ücretsiz CAN Bus ve J1939 Mühendislik Araçları | ALGO TEAM
CAN Bus, J1939, DBC düzenleme, CAN log analizi ve hidrolik devre simülasyonu için ücretsiz çevrimiçi araçlar.
algo-team.com
August 27, 2026 at 9:25 PM
astroarxiv.bsky.social
The Indian Pulsar Timing Array Data Release 2: III. Search for a Stochastic Gravitational Wave Background. Hemanga Tahbildar et. al. https://arxiv.org/abs/2608.02808
Noise marginalized distributions of the optimal-statistic signal to noise ratio ($ {S/N Figure 2 Per-pulsar dropout factors for the common process in InPTA DR1, sorted by value. Values above unity indicate support for that pulsar's participation in the common process. The dashed line marks the median, $1.004$; all pulsars lie below $1.2$ except PSR~J1939$+$2134. Figure 4
August 5, 2026 at 6:51 AM
auroraobd2.bsky.social
The CAT ET 4 Adapter Kit replaces the older ET3 units with faster USB communications and dual datalink support (J1939 & J1708).

www.obd2.ltd/goods-223-CA...
August 3, 2026 at 9:19 AM
nocteel.bsky.social
I worked with J1939, J1587, NMEA, etc. for years in the marine industry. I even reverse engendered much of the data to buld test rigs and QA stations cause I couldn't get access to the proprietary diag tools. This is by far the best explainer on CANbus I've ever seen.
youtu.be/QTTCqGtT6I4?...
CANBUS – Networking so simple, even YOU can understand it!
YouTube video by Dave's Garage
youtu.be
July 29, 2026 at 5:58 PM
oversecurity.net.web.brid.gy
Running high speed signals through CAN bus wiring
CAN bus wiring has a big effect on how fast data can go on CAN. CAN bits are normally 2000ns (2 microseconds, or 500kbit/sec) or longer for slower buses (a J1939 CAN bus runs at 250kbit/sec and can be up to 40m long). But CAN FD has the promise of much faster speeds on conventional CAN bus wiring, up to 8Mbit/sec (i.e. 125ns bit times). Yet most of the automotive industry is using CAN FD at just 2Mbit/sec or even slower. Why is this?
kentindell.github.io
July 27, 2026 at 2:36 PM
thehackerwire.bsky.social
🔴 CVE-2026-37534 - Critical (9.8)

Integer underflow vulnerability in Open-SAE-J1939 thru commit b6caf884df46435e539b1ecbf92b6c29b34...

https://www.thehackerwire.com/vulnerability/CVE-2026-37534/

#infosec #cybersecurity #CVE #vulnerability #security #patchstack
CVE-2026-37534 - Critical
May 1, 2026 at 8:59 PM
thehackerwire.bsky.social
🟠 CVE-2026-42467 - High (7.5)

An issue was discovered in Open-SAE-J1939 thru commit b6caf884df46435e539b1ecbf92b6c29b345bdfe (2...

https://www.thehackerwire.com/vulnerability/CVE-2026-42467/

#infosec #cybersecurity #CVE #vulnerability #security #patchstack
CVE-2026-42467 - High
May 1, 2026 at 6:18 PM
thehackerwire.bsky.social
🟠 CVE-2026-37537 - High (8.1)

collin80/Open-SAE-J1939 thru commit 744024d4306bc387857dfce439558336806acb06 (2023-03-08) contain...

https://www.thehackerwire.com/vulnerability/CVE-2026-37537/

#infosec #cybersecurity #CVE #vulnerability #security #patchstack
CVE-2026-37537 - High
May 1, 2026 at 6:00 PM
linux.activitypub.awakari.com.ap.brid.gy
CanLover – Can Bus Analyzer for Vector/Peak/Kvaser on Windows and Linux Article URL: https://canlover.ddns.net/ Comments URL: https://news.ycombinator.com/item?id=48256067 Points: 1 # Comments: 0

Origin | Interest | Match
CanLover — Free CAN Bus Analyzer | CANalyzer Alternative for Linux & Windows
A modern, lightweight CAN bus analyzer for Linux and Windows. The free alternative to Vector CANalyzer and PEAK PCAN-View — native SocketCAN, DBC/SYM decoding, J1939, Signal Plot, and more.
canlover.ddns.net
May 24, 2026 at 10:43 AM
linux.activitypub.awakari.com.ap.brid.gy
v0.1.0 of can_socket Pure Dart FFI bindings for Linux SocketCAN. Raw CAN, CAN FD, BCM, ISO-TP, and J1939. Changelog excerpt: - Initial release. - Raw CAN and CAN FD frame send/receive (`CanSocket`)...

Origin | Interest | Match
can_socket | Dart package
Pure Dart FFI bindings for Linux SocketCAN. Raw CAN, CAN FD, BCM, ISO-TP, and J1939.
pub.dev
April 13, 2026 at 5:50 AM
arxiv-cs-cr.bsky.social
Hwejae Lee, Hyosun Lee, Saehee Jun, Huy Kang Kim
Expanding the Attack Scenarios of SAE J1939: A Comprehensive Analysis of Established and Novel Vulnerabilities in Transport Protocol
https://arxiv.org/abs/2406.00810
June 4, 2024 at 5:00 AM
lastperson.bsky.social
It's really similar. Many of the same tier-1 suppliers. Some old LIN stuff, mostly CAN (J1939, KWP2000) on vehicles, then ISOBUS for implements. Lots of telemetry, connectivity, and data gathering.
November 17, 2024 at 4:56 PM
pub.dev.web.brid.gy
v0.1.1 of can_socket
Pure Dart FFI bindings for Linux SocketCAN. Raw CAN, CAN FD, BCM, ISO-TP, and J1939. Changelog excerpt: - Add README, CHANGELOG, LICENSE, and example for pub.dev. - Add repository, homepage, and topic metadata to pubspec.
pub.dev
April 13, 2026 at 6:57 AM
pub.dev.web.brid.gy
v0.1.1 of j1939
SAE J1939 on Linux SocketCAN via Dart FFI. Address claiming, BAM/RTS-CTS transport, DM1 diagnostics, NMEA 2000 Fast Packet, and zero-copy frames. Changelog excerpt: - Fix DM1 SPN decode bit-shift in FFI layer (was reading wrong 3 bits). - Add `.clang-format`config for consistent C++ formatting across toolchain versions. - Add `scripts/clang-format-check.sh`for local pre-commit checking. - Add library-level and public API doc comments.
pub.dev
April 13, 2026 at 6:57 AM
epsteinweb.bsky.social
Parts 1-4/4 — EFTA01416252.jpg
#epsteinweb #efta01416252
https://epsteinweb.org
EFTA01416158 | EFTA01416252 27)=6.711454441808054E-5 G1926*H1926=-4.650854412352153E-7 G1926'2=4.80211102415821E-5 H1926'2=4.504362072446506E-9 SUM(J1926:J2186)/(SQRT(SUM(K1926:K2186))*SQRT(SUM(L1926:L2186)))=0.7 788475339952251 22-Jul-10 1.2908 7.4497 9.61607276 LN(E1927/E1928)=-0.004587279036470498 LN(D1927/D19 28)=-0.011584120144150643 G1927*H1927=5.313959149321785E-5 G1927'2=2.1043128958441702E5 H1927^2=1.341918395141167E-4 SUM(J1927:J2187)/(SQRT(SUM(K1927:K2187))*SQRT(SUM(L1927:L218 7)))=0.7800527751757746 21-Jul-10 1.2818 7.5365 9.660285700000001 LN(E1928/E1929)=-0.015852401984646713 LN(D 1928/D1929)=-0.01071660359772949 G1928*H1928=1.698839081413191E-4 G1928^2=2.5129864868 283103E-4 H1928A2=1.1484559267086867E-4 SUM(J1928:J2188)/(SQRT(SUM(K1928:K2188))*SQRT(SUM(L1 928:L2188)))=0.7812888662786335 20-Jul-10 1.2884 7.6177 9.81464468 LN(E1929/E1930)=-0.012453717184790995 LN(D1929/D19 30)=-0.005955164220368528 G1929*H1929=7.4163930989456E-5 G1929A2=1.5509507171875854E-4 H192 '2=3.5463980891557495E-5 SUM(J1929:J2189)/(SQRT(SUM(K1929:K2189))*SQRT(SUM(L1929:L2189)))=0.7 9. 836420580040258 19-Jul-10 1.2968 7.6632 9.93763776 LN(E1930/E1931)=0.011491606344090475 LN(D1930/D19 31)=0.010257038286049387 G1930*H1930=1.1786984623954402E-4 G1930'2=1.3205701636754045E4 H1930^2=1.0520683440148295E-4 SUM(J1930:J2190)/(SQRT(SUM(K1930:K2190))*SQRT(SUM(L1930:L219 0)))=0.7858018164589945 16-Jul-10 1.2952 7.585 9.824091999999998 LN(E1931/E1932)=0.008874796845730993 LN(D 1931/D1932)=0.004386667358825653 G1931*H1931=3.893078163937701E-5 G1931^2=7.8762019052 99679E-5 H1931A2=1.924285051698643E-5 SUM(J1931:J2191)/(SQRT(SUM(K1931:K2191))*SQRT(SUM(L1 931:L2191)))=0.7848262895415719 1.2894 7.5518 9.737290920000001 LN(E1932/E1933)=0.015067602675328877 LN(D 15-Jul-10 1932/D1933)=0.002266928356215516 G1932*H1932=3.41571757648918E-5 G1932'2=2.2703265038157794E4 H1932^2=5.138964172213981E-6 SUM(J1932:J2192)/(SQRT(SUM(K1932:K2192))*SQRT(SUM(L1932:L219 2)))=0.7858802783604747 14-Jul-10 1.2730000000000001 7.5347 9.591673100000001 LN(E1933/E1934)=0.0026296490 8801533 LN(D1933/D1934)=-0.002094769148252361 G1933*H1933=-5.508507780304471E-6 G1933A2=6.91 5054326099856E-6 H1933'2=4.388057784469923E-6 SUM(J1933:32193)/(SQRT(SUM(K1933:K2193))*SQR T(SUM(L1933:L2193)))=0.7878484891095104 13-Jul-10 1.267 7.5504999999999995 9.566483499999999 LN(E1934/E1935)=-0.001840492 0939465855 LN(D1934/D1935)=-0.008571857839714954 G1934*H1934=1.5776436584429432E-5 G193 4.'2=3.387411147879887E-6 H1934^2=7.347674682428273E-5 SUM(J1934:J2194)/(SQRT(SUM(K1934:K21 94))*SQRT(SUM(L1934:L2194)))=0.7883287339609499 12-Jul-10 1.2585 7.6155 9.58410675 LN(E1935/E1936)=-3.342632337712634E-4 LN(D1935/D19 36)=0.0035517006554581982 G1935*H1935=-1.1872029464809732E-6 G1935'2=1.117319094512223E-7 H1935'2=1.2614577545982194E-5 SUM(J1935:J2195)/(SQRT(SUM(K1935:K2195))*SQRT(SUM(L1935:L2195)))=0.7 893210207410825 9-Jul-10 1.2634 7.5885 9.5873109 LN(E1936/E1937)=-0.00174814837179661 LN(D1936/D19 37)=0.0018862081607745693 G1936*H1936=-3.2973717251275418E-6 G1936'2=3.056022729815138E-6 H1936'2=3.5577812257725834E-6 SUM(J1936:J2196)/(SQRT(SUM(K1936:K2196))*SQRT(SUM(L1936:L2196)))=0.7 89818567458581 8-Jul-10 1.268 7.5742 9.604085600000001 LN(E1937/E1938)=-0.0016981350818450266 LN(D 1937/D1938)=-0.005411646243024334 G1937*H1937=9.189706335814458E-6 G1937^2=2.8836627561 928152E-6 H1937A2=2.928591505963939E-5 SUM(J1937:J2197)/(SQRT(SUM(K1937:K2197))*SQRT(SUM(L1 937:L2197)))=0.7893866283236041 7-Jul-10 1.2633 7.6152999999999995 9.62040849 LN(E1938/E1939)=-6.875420762288855E4 LN(D1938/D1939)=4.991199830414485E-4 G1938*H1938=-3.431659894276436E-7 G1938A2=4.72 71410658512657E-7 H1938'2=2.4912075747129585E-7 SUM(J1938:J2198)/(SQRT(SUM(K1938:K2198))*SQR T(SUM(L1938:L2198)))=0.7924749008861601 6-Jul-10 1.2648 7.6115 9.6270252 LN(E1939/E1940)=-0.006609965617008408 LN(D1939/D19 40)=-0.015823692434233882 G1939*H1939=1.0459406292440204E-4 G1939'2=4.369164545803334E-5 H1939'2=2.503892422532306E-4 SUM(J1939:J2199)/(SQRT(SUM(K1939:K2199))*SQRT(SUM(L1939:L2199)))=0.7 918486363990216 5-Jul-10 1.2532 7.7329 9.69087028 LN(E1940/E1941)=-0.002954525302479406 LN(D1940/D19 41)=0.0026156331274388403 G1940*H1940=-7.727954257021394E-6 G1940'2=8.729219762991026E-6 H1940'2=6.841536657355489E-6 SUM(J1940:J2200)/(SQRT(SUM(K1940:K2200))*SQRT(SUM(L1940:L2200)))=0.7 920852888863313 2-Jul-10 1.2602 7.7127 9.71954454 LN(E1941/E1942)=0.003482478954439305 LN(D1941/D19 42)=-0.0082509038512806 G1941*H1941=-2.87335990171869E-5 G1941A2=1.2127659668112675E-5 H194 1.'2=6.807741436307705E-5 SUM(J1941:J2201)/(SQRT(SUM(K1941:K2201))*SQRT(SUM(L1941:L2201)))=0.7 935627881075052 1-Jul-10 1.2455 7.7766 9.6857553 LN(E1942/E1943)=0.031028194990959188 LN(D1942/D19 43)=0.01435034728236375 G1942*H1942=4.452653736651637E-4 G1942A2=9.627488843969848E-4 H194 2.'2=2.0593246712444465E-4 SUM(J1942:J2202)/(SQRT(SUM(K1942:K2202))*SQRT(SUM(L1942:L2202)))=0.7 957296813824565 30-Jun-10 1.2248999999999999 7.6658 9.389838419999998 LN(E1943/E1944)=0.0074974722 LN(D1943/D1944)=0.001684216421671493 G1943*H1943=1.2627365869044392E-5 G194 408373265 3.'2=5.621209000212628E-5 H1943^2=2.836584955027928E-6 SUM(J1943:J2203)/(SQRT(SUM(K1943:K22 03))*SQRT(SUM(L1943:L2203)))=0.7983255439738841 29-Jun-10 1.2178 7.6529 9.31970162 LN(E1944/E1945)=3.3340959477790765E-4 LN(D1944/D19 45)=0.012980960992246661 G1944*H1944=4.327976944252785E-6 G1944'2=1.1116195788996859E7 H1944^2=1.6850534828222942E-4 SUM(J1944:J2204)/(SQRT(SUM(K1944:K2204))*SQRT(SUM(L1944:L220 4)))=0.7999890140471162 28-Jun-10 1.2333 7.5542 9.31659486 LN(E1945/E1946)=-0.009598739542852217 LN(D1945/D19 46)=-0.012928691858465029 G1945*H1945=1.240991457791998E-4 G1945'2=9.213580081151478E-5 H1945'2=1.6715107317113992E-4 SUM(J1945:J2205)/(SORT(SUM(K1945:K2205))*SQRT(SUM(L1945:L2205)))=0.8 036171314026451 EFTA01416252
February 20, 2026 at 4:56 AM