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ARStack M3.H.3 — Official Stable Process Bus Simulator (Autonomous SV/PTP)

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processbus-sim-m3h3-20261025
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ARStack M3.H.3 — Official Stable Process Bus Simulator for Engineers

Release: processbus-sim-m3h3-20261025 · 25 October 2026 · Free/open-source official stable lab release

Generate real IEC 61850 Sampled Values and PTP traffic with one ESP32-P4. Use ARStack Studio for practical isolated-bench relay/BCU subscriber experiments, SV configuration troubleshooting, digital substation demonstrations and waveform scenarios. This is a traffic-generation simulator: configure the destination MAC, APPID, VLAN and svID to match the receiving engineering setup.

Official release artifacts: GitHub latest stable. Builds retain the exact binaries that passed CI for commit 2231ac35fa13211b2b0c3b51243a7e352389559c (merged by PR #332 as 9d980e8f766f779a881e770894c09a05b37e42e2). No source modification or binary rebuild was introduced during stable packaging. Windows Setup EXE, portable ZIP, firmware, Linux AppImage and SHA256 checksums are all provided together.

What you can do

  • Windows x64 ARStack Studio installer and portable package, with matching ESP32-P4 4I+4V SV/PTP firmware.
  • Linux x86_64 AppImage, tested in exact-source CI.
  • Autonomous publisher: closing Studio or disconnecting the USB control session does not itself stop board SV transmission while ESP32-P4 remains powered and Ethernet remains UP.
  • Reconnect adoption: reopening Studio reads and follows the board's actual STARTED/STOPPED state and verified channel/frequency/CT parameters; no unsolicited START/STOP.
  • Fail-closed physical Ethernet link-down/driver-stop behavior; reconnecting the LAN does not automatically rearm SV.
  • SV + PTP on real Ethernet: 4I+4V · 4000 SV fps (nominal) · 1 ASDU · 64-byte payload · PTP SOURCE laboratory clock emulation · SV-LAN-AUTONOMY-V1 capability contract.
  • 12/12 exact-head CI passing including matched firmware checks, Windows installer installation/upgrade/uninstall, Linux AppImage.

M3.H.3 SV/PTP traffic captured on real Ethernet

Independent capture measure Observed
SV wire capture span 1176.305628 s (19 min 36 s)
Sampled Values received 4,705,090 frames
Observed SV frame rate 3,999.8865 fps
Missing sample count 0
Duplicate sample count 0
Counter reset / reorder 0
Malformed SV frames 0
PTP L2 frames 3,528
PTP Announce / Sync / Follow_Up 1,176 each
SV smpSynch=2 4,705,090 frames (100%)

The capture was collected on a separate Ethernet interface using dumpcap/Npcap (ARStack_SV_20261025_063546_648_report.json). It records 4,705,090 actual SV frames, stable counters, and simultaneously observed PTP Layer-2 traffic. The board ran with the internal lab PTP SOURCE setting (INTERNAL_GM_ONLY); this is a Process Bus simulator, not a GPS/UTC metrology reference.

Next engineering features

  • Multi-SV: multiple separately configured stream identities and sample counters published concurrently from a single ESP32-P4.
  • SCL-driven virtual Merging Unit: load SCL/SCD/CID/IID, select supported SampledValueControl/DataSet definitions and publish their SV identities over the lab LAN.
  • Practical workflow: select a stream, configure waveform and stream addressing, START and observe subscriber behavior. No costly external PTP equipment, relays or vendor analyzers are required to develop and use the simulator; community relay/BCU feedback is welcome.

These are next-phase goals, not current M3.H.3 features. Multi-SV + SCL architecture and milestones.

Network scope: dedicated/isolated engineering LAN or test bench only, not an operational substation process bus.

Download and install

  • Windows x64 installer: ARStack-Studio-M3H3-win-x64-setup.exe.
  • Windows x64 portable: ARStack-Studio-M3H3-win-x64-portable.zip.
  • ESP32-P4 firmware: ARStack-ESP32P4-M3H3-firmware.bin and firmware-manifest.json.
  • Linux x86_64: ARStack-Studio-linux-x86_64.AppImage and checksum.
  • Integrity: SHA256SUMS.txt covers all six downloadable data/checksum assets.

The Windows executable was originally compiled by the verified Native Preview CI pipeline and retains its internal preview installer identity; it is officially distributed here as the accepted lab build. This does not silently overwrite an older stable installation. Install/flash the firmware from this same release, not a historic M3.H or v0.1.1 image.

Engineering provenance

Assets 9
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