GRBL Diagnostic / serial terminal

Disconnected
Unknown
Connection
Quick commands
Advanced Diagnostics ▸
Start wait:
No preset loaded. Shareable test links can prefill diagnostics and safe command sequences.
These commands run one at a time in order, and stop if the active command returns error: or ALARM:. Use hex:18 for a raw byte like 0x18. Reserved builder actions: |clip copies the current diagnostics log to the system clipboard.
Alarm reference
ALARM:1 Hard limit
ALARM:2 Soft limit
ALARM:3 Reset while in motion
ALARM:4 Probe fail (contact)
ALARM:5 Probe fail (no contact)
ALARM:6 Homing fail (reset)
ALARM:7 Homing fail (door)
ALARM:8 Homing fail (pulloff)
ALARM:9 Homing fail (approach)
ALARM:10 Homing fail (dual)
Tips
Stuck on BUSY? Send $X to clear alarm state.
No ports listed? Install CP2102 or CH340 USB driver.
Chrome / Edge only. Web Serial API is not supported in Firefox or Safari.
Terminal output