mcu: Serial connection closed / Timeout on connect / Wait for identify_response
Background
The printer-board / MCU did not respond to the connection attempt of the Klipper Host until finally the serial connection timed out and was closed. Typically these 3 errors will go hand in hand in the klippy.log
Reasons
- Hardware issues between the board and the SBC, e.g. USB port, USB cable etc
- Wrong parameters during
make menuconfig
when building the firmware for the board - Firmware not correctly flashed to the board
- Dead board
Potential solutions
- Follow How-To Trouble-Shoot → Connection Problems to the printer board → 3. Check Linux Diagnostic Messages to check if and how the board registers on the Host
- If it registers but does not identify as Klipper then most like the firmware is not correctly flashed
- If
dmesg
shows simply nothing, then either the USB connection is faulty or even the board may be dead
- Check and verify the parameters used during
make menuconfig
- Repeat the flashing process
- Check with
ls /dev/serial/by-id/*
for the presence of the board and compare the output to the settings[mcu]
block