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ARStack Process Bus Simulator M3.H — Stable Lab Simulator Edition

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@github-actions github-actions released this 24 Oct 05:48
processbus-sim-m3h-20261024
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ARStack Process Bus Simulator M3.H — Stable Lab Edition

24 October 2026 · Public stable release

Generate IEC 61850 Sampled Values and emulate PTP synchronization using ARStack Studio and ESP32-P4 Ethernet hardware. This edition combines a 4-current + 4-voltage SV publisher, internal laboratory PTP grandmaster simulation, and hardware-assisted phase synchronization.

ARStack Studio 4I+4V workspace and waveforms

What's new

  • SV + PTP in one lab setup — real Ethernet SV at 4,000 frames/s alongside Layer-2 PTP Announce, Sync and Follow_Up.
  • Hardware-assisted synchronization — ESP32-P4 EMAC timestamp/phase evidence supports SMPSYNCH AUTO and qualified lab smpSynch=2.
  • Simple desktop control — adjust 4I+4V magnitudes and phase, use explicit Start/Stop, preview waveforms and capture traffic.
  • Matched firmware included — Windows Setup and Portable packages contain the ESP32-P4 firmware, firmware manifest and installation utility.

Download and try it

Latest stable release and assets · Windows installation · First-run tutorial

  1. Install ARStack Studio from Windows Setup EXE or use the Portable ZIP.
  2. Connect a compatible ESP32-P4 Ethernet board on an isolated lab network.
  3. Open Configuration → Firmware and install the firmware from this same release. Check the device build ID a922e9bdba4e57a4.
  4. Choose 4I+4V Quick Start, select PTP SOURCE / INTERNAL_GM_ONLY and SMPSYNCH AUTO, adjust the waveforms and press Start.
  5. Inspect SV (0x88BA) and PTP (0x88F7) with Studio Capture, ARSAS, DigSubAnalyzer or Wireshark.

No external GPS or protection relay is needed for the isolated-lab emulator. Never connect an unsolicited SV publisher or PTP grandmaster to a live substation process bus.

Measured Ethernet results

The independent M3.H engineer capture from 24 October 2026 recorded:

Measurement Result
Continuous SV capture 40.762934 seconds
SV frames 163,048
Measured SV rate 3,999.884 frames/s
smpSynch=2 100% of the recorded SV
Missing / duplicate / reordered counters 0 / 0 / 0
Malformed SV / nonzero quality 0 / 0
Host-capture spacing median 250 microseconds
PTP Announce 44
PTP Sync / Follow_Up 43 / 43 paired

Reference Ethernet SV profile: one ASDU, 4I+4V, eight INT32+Quality pairs (64 bytes), APPID 0x4000, svID=ARSTACK_SV01, multicast 01:0C:CD:04:00:01, smpCnt=0…3999.

PTP source emulation uses Layer-2 Announce/Sync and hardware-timestamp-derived Follow_Up at approximately 1 Hz (domain 0). This is an internally simulated laboratory grandmaster profile; smpSynch=2 denotes qualified local emulation evidence, not external UTC/GNSS calibration.

Measurement and reproduction notes

The raw capture is identified by SHA-256 7764c1477c357eb0e08b552073bd5cedd0816d8617c1fd587fff6cdf62e1b190. It was provided as independent engineer evidence and is not bundled in the installer.

The operator's requested 120-second capture was interrupted by a SV STOP after 40.763 seconds, so the 120-second capture request was marked INVALID_CAPTURE. The recorded 40.763-second segment itself is contiguous and valid. This file alone should not be represented as a 120-second endurance record. Extended internal observations and the archived PCAP are different evidence sources.

External relay/BCU subscriber acceptance, multi-device PTP behavior and physical UTC time accuracy are outside the measurements in this specific capture. Engineers with external equipment are welcome to share lab interoperability observations.

Build identity and downloadable artifacts

The published Studio and firmware pair is pinned to source SHA a922e9bdba4e57a4e88406eb83344455dd8ff142 (embedded Build ID a922e9bdba4e57a4); its source build passed 10/10 CI workflows. Integration to main later passed 14/14 candidate workflows through PR #299, without changing this shipped firmware/Studio source.

Artifact SHA-256
ARStack-ProcessBus-M3H-win-x64-setup.exe 4902e8bf44e78fc55a139ce84a1273f0768ef6fe10000f5d0f85d75d2f6c736e
ARStack-ProcessBus-M3H-win-x64-portable.zip ca01424e4102aa65e353737024ebf3258b4d2f614fa60d932c95c353ee228d8f
ARStack-ESP32P4-ProcessBus-M3H-firmware.bin 61c508e9bf1357eb964d2b817b260b6a0e985446ddd68de1d45d9467e25c4607

The release includes firmware-manifest.json and SHA256SUMS.txt. The supplied Windows packages include a pinned board flasher; users do not need an embedded build toolchain.

Download the latest public release · Help and community testing

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