Release Notes | IST Firmware 2.1.28

On October 29, 2026, we deployed Firmware Build 2.1.28 to all IST Spark Canvases.

Canvases will update during their regularly scheduled maintenance window. For guidance understanding and/or modifying maintenance windows, see Defining a Maintenance Schedule for a Canvas (Portal3).

What's Included

Firmware Build 2.1.28 (VLE 2.1.28) includes fixes for Brightness Schedule performance.

Embedded APKs:

• Superuser - 6.4.1-release-embedded-227-f3ad949
• iCanvas - 6.2.9-release-embedded-sdk23-1376-87d337d3
• Adsync - 6.2.12-release-embedded-sdk23-536-c27dab2

Supported Environments:

• VLE3.0

Supported Hardware:

• IST Spark 5
• IST Spark 4
• IST Spark 3
• IST Spark 2
• IST Spark Q+