20 September 2025
Palmer House Hilton
US/Central timezone

Phoebus PVWS Data Source: WebSocket access to EPICS PVs

20 Sept 2025, 14:20
5m
Adams Room (Palmer House Hilton)

Adams Room

Palmer House Hilton

17 East Monroe Street Chicago, IL 60603, USA
Lightning talk Clients & Frameworks Lightning talks

Speaker

Kunal Shroff

Description

We present a new Phoebus data source that speaks directly to PVWS (PV Web Socket) endpoints, enabling low-latency, firewall-friendly access to EPICS Process Variables. PVWS bridges Channel Access and PVAccess to WebSockets and transmits values plus metadata (units, limits, severity, timestamps), sending full metadata once and then only deltas—reducing bandwidth. Integrating this datasource in Phoebus lets any applications (e.g., Display Builder, Data Browser) to subscribe, write (when permitted), and operate seamlessly against control systems remotely via standard web infrastructure.

Authors

Alexa Rivera (SUNY Old Westbury) George Bonilla (SUNY Old Westbury) Jack Soesman (SUNY Old Westbury) Kunal Shroff

Presentation materials

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