How Aillio Bullet telemetry works in Rostoc.

Direct Answer

Aillio Bullet support in Rostoc is a dedicated read-only roast logging integration. There is nothing to configure by hand: Rostoc never asks for a COM port or baud rate, and a generic serial or thermocouple entry is the wrong path even when the Bullet shows up as a serial port.

Different Bullet generations expose different useful fields. Rostoc maps those readings into standard roast streams so the resulting batch can be reviewed with temperatures, rate of rise, feedback values, notes, and inventory context.

USB or COM port: the Bullet firmware decides

How the Bullet appears to your computer depends on its firmware. Older Bullet R1 firmware exposes a direct USB device with no COM port. Firmware 626 and later presents a standard serial COM port instead, a change Aillio documents for its new firmware. Rostoc tries the direct USB connection first, then falls back to the serial port automatically, so setup in Rostoc is identical either way.

The most common troubleshooting mistake is switching to a generic serial or thermocouple entry after a connection problem. The Bullet speaks Aillio's own protocol even over its serial port, so a generic setup reports empty responses and hides the real issue. Keep the machine on the Aillio Bullet catalog entry while debugging.

Serial-firmware support arrived in Rostoc 0.3.70 and is the newest part of this integration, with the least validation on real roasters so far. Update Rostoc before connecting a Bullet R1 on firmware 626 or later, and treat a connection that still fails there as a known limitation worth a support report.

• Use the Aillio Bullet catalog entry, not a generic serial machine.
• Use a data-capable USB cable and connect directly if possible.
• Close other apps that may already own the Bullet connection; on serial firmware only one app can hold the port.
• Report operating system, Bullet generation, firmware version, and other open roasting software if detection fails.

What Rostoc reads from Bullet generations

The exact labels can differ between Bullet generations, but the validation idea is the same: temperatures should move plausibly, feedback values should not be mistaken for temperatures, and the saved batch should reopen with the right labels.

How telemetry becomes a production record

Rostoc treats the machine readings as one part of a larger roast record. Once the USB stream is validated, the batch can carry machine curves beside green lot usage, roast plan context, operator notes, and production history.

That is the main difference between simply seeing Bullet data and using it operationally. The telemetry needs to survive the roast as a readable, searchable, reusable record.

• Live readings become chart streams during roasting.
• Feedback streams help explain machine behavior without cluttering temperature curves.
• The saved batch preserves stream labels and values for later review.
• Inventory and plan context make the record useful after the roast ends.

First validation checklist

Run this checklist before relying on Aillio Bullet experimental support in production. It catches the failures that matter most: wrong model entry, competing USB ownership, swapped labels, and saved-record drift.

• Pick the exact R1, R1 IBTS, or R2 catalog entry.
• Close RoasTime, Artisan, or any other app that may be connected to the Bullet.
• Start a short test roast or dry validation session if appropriate for your workflow.
• Compare live values against the Bullet display or trusted software.
• Save and reopen the batch before treating the setup as production-ready.

Sources and further reading

Artisan also documents Aillio Bullet R1/R2 as a vendor-specific USB protocol, which matches the setup point above: the Bullet is never configured as a generic serial COM-port machine, even on firmware where it exposes a serial port. See the Artisan Aillio machine page.

Aillio product pages identify current Bullet R1 and Bullet R2 product lines: Aillio Bullet R1 V2 and Aillio Bullet R2.

For Rostoc setup steps, use the Aillio Bullet USB docs and Aillio Bullet integration page.

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