What is the problem?
I have an ender 3v2 and am running octoprint on a raspberry 4.
I always power up the raspberry first and start the printer from within octoprint using PSU control and a relay. (The 5V line from the USB connection to the printer is interrupted!)
Once the printer comes up and octoprint connects, I always get an error "serial status mismach".
The "last communication" window shows:
Changing monitoring state from "Offline" to "Detecting serial connection"
Performing autodetection with 1 port/baudrate candidates: /dev/ttyUSB0@115200
Trying port /dev/ttyUSB0, baudrate 115200
Connecting to port /dev/ttyUSB0, baudrate 115200
Handshake attempt #1 with timeout 5.0s
Connected to: Serial<id=0x6e7d3aa8, open=True>(port='/dev/ttyUSB0', baudrate=115200, bytesize=8, parity='N', stopbits=1, timeout=5.0, xonxoff=False, rtscts=False, dsrdtr=False), starting monitor
Send: N0 M110 N0*125
Recv: šÑatus mismatch
Recv: Error:Serial status mismatch
Changing monitoring state from "Detecting serial connection" to "Error"
So this looks to me as if the connection worked, then tried again and failed!?
When I close this error message and manually hit connect, everything works fine. So it is really only the first connection that fails. subsequent disconnects/connects work fine.
What did you already try to solve it?
- USB cable without 5V connection
- playing with the connection settings without a clue/success
Have you tried running in safe mode?
yes
Did running in safe mode solve the problem?
no, same error but obviously without PSU control but with manual on/off.
Systeminfo Bundle
octoprint-systeminfo-20250808103010.zip (204.7 KB)
Additional information about your setup
Ender 3v2 with jyers 2.0.1 firmware, octoprint 1.11.2
