### The problem #456
Description
The problem
Model: Deebot T30C Gen2
Class ID: r0321c
Firmware: fwVer 1.41.0 / wkVer 0.1.54
HA Version: 2026.1.x
Problem:
Device is discovered and status updates work,
but ALL control commands (vacuum.start, clean, getCleanInfo, getMapSet)
fail with:
code: 20003
msg: "rcp not support"
Logs show:
"Handler for message returned no response. This is a bug should not happen."
What version of Home Assistant Core has the issue?
2026.1.3
What was the last working version of Home Assistant Core?
No response
What type of installation are you running?
Home Assistant OS
Integration causing the issue
Ecovacs
Link to integration documentation on our website
No response
Diagnostics information
Model: Deebot T30C Gen2
Class ID: r0321c
Firmware: fwVer 1.41.0 / wkVer 0.1.54
HA Version: 2026.1.x
Problem:
Device is discovered and status updates work,
but ALL control commands (vacuum.start, clean, getCleanInfo, getMapSet)
fail with:
code: 20003
msg: "rcp not support"
Logs show:
"Handler for message returned no response. This is a bug should not happen."
Example YAML snippet
Anything in the logs that might be useful for us?
Additional information
No response
Originally posted by @ChaosWarrior22 in home-assistant/core#161638