I have an Ultimaker2 with Tinkergnome software. Recently i noticed strange behavior in the preheat menu. When I set the nozzle temperature to 10 degrees in the menu and i want to reset it to 0 with G-command "M104 S0" from USB, the setting goes to 160 degrees. In another case I saw it go to 200 degrees. I don't have the latest version of Tinker. I can not update because of partly broken USB-chip. Is this a known bug? If I send "M104 S1" it works fine.
My response to M115:
FIRMWARE_NAME:Marlin Ultimaker2; Sprinter/grbl mashup for gen6 FIRMWARE_URL:http://github.com/Ultimaker PROTOCOL_VERSION:1.0 MACHINE_TYPE:Ultimaker EXTRUDER_COUNT:1