robofleet_ws (ryantcliff)MCADConfidence: Medium

The ultrasonic e-stop ignored sensors with no recent reading, so an unplugged, crashed or late-enumerating Arduino left the robot with no obstacle backstop and only a log warning. Now fail-closed by default: any stale sensor blocks forward motion. The unplug and replug path is still untested.

Impact Analysis

Persona

Mechanical Designer

Team Size Impact

5x Multiplier

Prototype Delay

3 Days

Est. Annual Cost

$30,000

1 user · 1 month240 min
Rest of team960 min
Rest of year13,200 min

monthly_minutes × 12 × team_multiplier ÷ 60 × $75/hr = $30k/yr

$75/hr assumed rate.

Annual team-minutes decomposed from the reported monthly inputs.

Evidence & Sources

1 Sources

ryantcliff/robofleet_ws PR #8: Block forward motion when an ultrasonic sensor goes silent; docs in the team's voice

github.com

→

Analyst Notes

From the Grok pain-radar digests, Oct 28-29 2026 (Oct 28 8:41 AM ET through Oct 29 early-morning Haitch editions). Verified live 2026-10-29: issue/PR read; title and state confirmed.