BLTouch stop working on DuetWifi & Duex5 after fw update to 3.4

paolo panzini

Hi, i have a duet wifi with duex5 with original Antclabs BLTouch and everything work fine before firmware update from 3.3 to 3.4.1.
In normal condition the bltouch when i power on the printer deploy and retract and bltouch light red remain on.
After printer update the BLTouch when i power on the printer deploy and DO NOT retract and BLTouch start to flash light red. Then it's error and BLTouch do not work.
Could be BLTouch broken? o what else?

config.g:

; ############## Endstops ##############
M574 X1 S1 P"!xstop"
M574 Y1 S1 P"!ystop"
M574 Z1 S2

; ############## Z-Probe BL-Touch ##############
M558 P9 C"^zstop" H5 F100 T4000
M950 S0 C"duex.pwm1"
G31 P25 X28.5 Y-5 Z2.190

; ############## Define mesh grid ##############
M557 X30:290 Y30:290 S20

deployprobe.g:
M280 P0 S10

retractprobe.g:
M280 P0 S90

Phaedrux

If you are certain nothing else changed other than the firmware update you could verify it's a firmware issue by downgrading the firmware back to 3.3.

https://github.com/Duet3D/RepRapFirmware/releases/download/3.3/Duet2and3Firmware-3.3.zip