TESTJ1939(1)

📦
version 2023.03 · 3 versions
, in ubuntu resolute, ubuntu stonking

✨ TESTJ1939 ✨

okay bestie, gather round, because today we're going to talk about testj1939 💖 — it's a user command, it lives in the manual, and it's literally here to demonstrate j1939 use. that's the whole vibe. it's giving "little demo tool that could" and honestly? we're obsessed. 🦋

this page ships with testj1939 2023.03-1build1, so if you're running that version you're in exactly the right place, no cap.

🌸 SYNOPSIS 🌸

testj1939 [OPTIONS] FROM TO

two positional args, both required, no skipsies. 🎀

💅 DESCRIPTION 💅

testj1939: demonstrate j1939 use</purpose>

that's it, that's the mission statement, and she ate. 🔥

🫶 FROM / TO

both of these take the same shape, and it's one of two things:

  • literally just - (yes, a single dash, she's minimal like that)
  • or the whole fancy format: [IFACE][:[SA][,[PGN][,NAME]]]

so like, you can be chill about it or you can go full main character with every field filled in. your choice, both valid, we support both. ✨

👑 OPTIONS 👑

every single one, in order, nothing skipped, because we don't do that here:

  • -v — print the relevant API calls. she's narrating her own life for you. commentary mode on. 🗣️
  • -s[=LEN] — do an initial send of LEN bytes of dummy data. fake data, real packet, iconic behaviour. 💅
  • -r — receive (and print) data. sit there, look pretty, listen. 👂
  • -e — echo incoming packets back. and yes, important caveat bestie: this actually receives packets, so it's not just pretending. 📢
  • -c — issue connect(). just… call the thing. that's the whole job. 🤝
  • -p=PRIO — set the priority to PRIO. pick your number, own it. ⭐
  • -P — promiscuous mode. allows you to receive all packets. she's nosy and we respect it. 👀
  • -b — do a normal bind with SA+1, then rebind with the actual SA. two-step bind, little dance, cute. 💃
  • -B — allow sending and receiving broadcast packets. go wide, bestie. 📡
  • -o — omit bind. skip it entirely, no bind, bye. ✌️
  • -n — emit 64bit NAMEs in the output. big names only, we love a long name. 💖
  • -w[TIME] — return after TIME seconds (default 1). set a timer, dip out, self-care. ⏰

🌈 EXAMPLES 🌈

because sometimes you just need to see it, yk? iykyk:

testj1939 can1 20

look at her go. 🚗✨

ok lowkey reminder before you yeet yourself into it: -e genuinely receives packets, so don't be surprised when packets show up. that's not a bug, that's the feature. 😭

and that's the page, bestie!! this whole thing is from testj1939 2023.03-1build1, dated December 2025, and it's filed under TESTJ1939(1) in section 1 of the manual — user commands, where all the fun stuff lives. 🎀 go forth, run your j1939 demos, and slay. periodt. 💅✨🦋

📦 where this page comes from