v2.0

Release of the AirGradient SUNX CO₂ sensor module v2.0 — the SUNX-only adapter in production use.

A 2-layer adapter for the SenseAir Sunrise/Sunlight ("SUNX") NDIR CO₂ sensor family: sockets matching the sensor's 5-pin and 4-pin headers, an HT7333 3.3 V LDO with bulk decoupling for the sensor supply, and a solder jumper (JP1) for sensor power selection. Power and UART are routed to an 8-pin host connector.

Changes since v1.0 (combined S8 + SUNX board)

• S8 support removed — SUNX-only footprint (5-pin + 4-pin sockets)
• Bulk decoupling added on the sensor supply (2× 10 µF + 2× 22 µF)
• Design moved to KiCad 9

The S8-only and combined S8 + SUNX variants continue in their own repositories.

Attached: sunx-v2.0.zip — the Gerber production set (the Gerber filenames inside keep the design's original CO2-sensor-pcb naming). BOM and pick-and-place files are tracked in the repository under sunx/production/.

Note: the v2.1 branch holds untested work in progress and is not part of this release.