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Marlin crashes on M105 command

Posted by paulr 
Marlin crashes on M105 command
May 04, 2017 10:15AM
I'm running the latest version (1.1.x) on a RAMPS 1.4 single extruder setup.

The board boots up and displays the expected information, including correct temperatures for the extruder and bed, updating every few seconds.

I can connect using a serial terminal, and I'm able to change the display with a 'M117 Hello' command.

However, when I try an M105 command, the response is: 'ok T: ', then about 4 seconds later the LED on the RAMPS board starts flashing quickly (perhaps 10Hz), and no more commands are processed. The LCD stops updating. I can't even re-flash the board when it's in this state; I have to power it down and start again.

I've double-checked my config file, and the fact that the temperatures initially read correctly on screen leads me to think there's no obvious error there. Can anyone help?
Re: Marlin crashes on M105 command
May 04, 2017 02:32PM
I have the same problem with the same setup.

First I saw that PID Autotune would crash after ok T:
I thought it was a problem with Autotune so I just put in the values by hand.
Now I'm trying to print and the printer continuously reboots.

I've narrowed it down to the command M105 (using a serial terminal)
Re: Marlin crashes on M105 command
May 05, 2017 05:33AM
I think they might have fixed it here
[github.com]

I will check it this evening.
Re: Marlin crashes on M105 command
May 05, 2017 06:18AM
Yes, that works, I think it's a temporary hack as it reduces the temperature returned to an integer.
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