Can i tell my ender 3 to stay hot in between prints? I have the bigtree tech mini e3 board in it. I looked on the web and all i get is troubleshooting heating problem replys no matter how i ask the question.

With the Marlin firmware you will need to use the front panel to enable preheat.

Perhaps a Raspberry Pi board with OctoPrint may have a way of doing this.

I will not recommend this and I have not tested this but a dirty cheat trick may be to edit the print end gcode and comment ";" the "M140 S0" line that turns off bed heating after a print. But this can be dangerous if you leave the printer un-attended and you will need to always manually use the front panel menu to stop the bed heating.

I am not updated with the 3d printing firmware side of things lately and so perhaps someone might have a better answer.

Yea, now that I think about it, maybe it’s better that it shuts off.

Yes, you can set the Ender 3 to stay hot in between prints by using the G-code command M104 S[temperature] in your slicer software or by manually entering it into the terminal of your 3D printer. The M104 command sets the temperature of the hotend and the "S" parameter specifies the temperature. For example, to set the hotend to 220°C, you would use the following command: M104 S220. The Bigtree Tech mini E3 board should support this command.