Marlin: string format via serial?

[catx23]

Hi,
I could manage to connect via custom serial-port client in Node.JS. However, when connecting I don't get really plain text but utf8 looking like text.

Could please anyone tell me what i have to do to get it as readable text. I was studying pronto-CLI and also your source code all day long but I can't get it converted.

thats me serial config :

var options = {
                baudrate: 250000,//is correct
                parity: 'none',//'none', 'even', 'mark', 'odd', 'space'
                rtscts: false,
                xon: false,
                xoff: false,
                xany: false,
                hupcl:true,
                rts: true,
                cts: false,
                dtr: true,
                dts: false,
                brk: false,
                databits: 8,
                stopbits: 1,
                buffersize: 256,
                parser: com.parsers.raw
};

here a sample: \r�E\u0010\u0017w\u001e[�L�O|���\u001ek\u001ak,\u001b$rT'

or as hex:

<Buffer 3a 24 0a 0f fb 59 0d d4 a3 50 78 c0 1a d9 be 61 1a 94 5f 72 70 94 04 52 1e 11 50 c3 d4

any idea ?
I was also looking for simple protocol specs on reprap.org but i am ending always in dead links or incomplete docs.

thanks a lot.

[jbrazio]

Are you positive you're connecting to the Marlin serial port ?
We use plain ASCII on the serial port, try lowering the baud rate or disabling RTS or CTS.

[birkett]

Baud rate is incorrect - needs to be 250,000. (Not 25,000)

[jbrazio]

@birkett he's got a comment //is correct for the baud rate :-)

[catx23]

hi,
so tried different port speeds and RTS/CTS settings but no. Btw, the printer connect successfully at 250000 with the printrun console on linux. So now I am out of advice.

i gonna try harder by debugging prconsole with PyCharm and if there is any interest, let you know.

I can also post a minimal test package here which tries to connect to Marlin via node-js "serialport". There are actually some little apps out there doing the same but they are all abandoned, outdated or not working.

thanks a lot again. close this here just. I understand its not really your problem. Btw, is there a special command terminator after "Mxx" or "Gxx" i have to send ? something like 0x0d or so ?

[Blue-Marlin]

'n' or 'r' is required to end a line. (nothing will happen before seen that)

[jbrazio]

One problem you may find is the baud rate, some terminal programs may not support 250000.
I would start by testing at 115200 and keep it until the connection is stable.

[catx23]

Thanks Blue Marlin & jbrazio. Gonna re-install Marlin with that baud rate.

[catx23]

holy crap jbrazio, that worked! Now i am back business and we can enable our user to build their own printer software with a few clicks:

i guess, we just have to add the G-CODEs and M-Codes of Reprap but also from Marlin.

horray! 2 days fighting over such stupid thing. i gonna tell the author of nodejs/serialport.