Hi @chamnit, hello everybody
I am going to write a function to parse a gcode file and strip out all the redundant commands and parameters.

I know that some commands and params are modal: if you send S120 you dont need to send it again unless you want to change power, if you send G1 you can send a sequence of XYZ movement without sending G1 again etc

My questions are:

• This concept of modal commands and parameter are proper to grbl interpreter or they are defined as standards for any gcode interpreter?
• Can you confirm that grbl has two different set of memories for G0 and G1-2-3? As example i can set G0 F1000 and G1 F2000 on top of the code and all the next G0 will be executed with F1000 and G1 at F2000? Is this a grbl implementation or a gcode standard?
• Do you know any place where I can find some documentation about modal/non-modal command and parameters that can help me writing this function?

Thanks a lot, Diego