Thank you @bearer for tip. But when I updated to 3.1.1 and tried all posibilities about M555 no mode response ok to G28. In version firmware 3.1.0 I set M555 P2 and G28 response ok after finished homing. In version 3.1.1 not . Do you know, if there something else to try? I am litle bit confused about only "my" problem? Because our software wait to OK response when homing is trigered. Other command work well and response ok status.

When using command G28 or G28 and axes (G28 X/Y/Z) there is no response from duet 3D 'ok message'. Command was done fyzically successful. Same problem was in beta versions until 3.1.0. Version 3.1.0 is correctly responding with "ok message" and after upgrade by RPi to version 3.1.1 by command sudo apt-get update & sudo apt-get upgrade the same problem appeared again. The machine is now downgraded to 3.1.0.

Re: Software bundle 3.1.1 now available
Re: https://github.com/Duet3D/RepRapFirmware/issues/409

zudy created this issue in Duet3D/RepRapFirmware

closed no 'OK' response when G28 command is used. Firmware 3.1.1 #409