Correction for g code documentation

jens55

https://duet3d.dozuki.com/Wiki/Gcode#Section_M117_Display_Message

The documentation reads :

M117: Display Message
Example
M117 Hello World

according to what I gather, it SHOULD read M117 "Hello World"
(quotation marks are currently missing)

dc42

The quotation marks are optional. I have updated the documentation.

jens55

Thanks .... but with RRF3.0 and without the quotation marks, there was no output to the web interface. Once the quotation marks were used, the output was there.
I guess I should mention that this was happening as I was trouble shooting my weird issue with gcode that hung (see other thread) so I suppose this could have affected things.

dc42

@jens55 said in Correction for g code documentation:

Thanks .... but with RRF3.0 and without the quotation marks, there was no output to the web interface. Once the quotation marks were used, the output was there.
I guess I should mention that this was happening as I was trouble shooting my weird issue with gcode that hung (see other thread) so I suppose this could have affected things.

Which Duet are you using; and if it is Duet 3, is it with or without the SBC?

jens55

Duet2 wifi

jens55

Just tried it out without quotation marks and it does work fine so all I can say is that it could all boil down to some weird file corruption issue as reported here:
https://forum.duet3d.com/topic/14541/weird-fault-on-homey-g

I tried many different things in an attempt to isolate the issue and it is quite possible that I got my wires crossed between the quotation marks and the homey.g file locking up and what not.
In any case, I thing it's great that you changed the documentation for completeness sake - thanks

Danal

Some early releases of DSF on Duet 3 + Pi did very odd things without the quotes. IIRC, there was some internal string escaping (or un-escaping) going on.

dc42

The rule is:

Where a string parameter is used with a letter to introduce it, quotation marks should be used around the string. For RRF3 on Duet 3 with attached SBC, the quotation marks are mandatory. In other cases they are optional for some older commands, e.g. M98.
Where a string parameter used without a letter to introduce it, quotation marks are optional. Examples are M32 and M117.