Topic: Newbie with grbl | Synthetos.com

Tagged: Arduino, CNC, grbl, help, Miranda, new

This topic has 9 replies, 5 voices, and was last updated 14 years ago by rickv.

Viewing 10 posts - 1 through 10 (of 10 total)

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March 17, 2012 at 9:39 pm #1717

blizard123
Member

I bought a preloaded grbl ATMega328p chip for my arduino. I made sure I put it in the right way so then I hooked it up to the computer. I opened up serial monitor and went through all the baud rates but I keep getting a bunch of little squares. My question is did I do something wrong or what should I do.

March 18, 2012 at 9:10 am #1718

alden
Member

What terminal program are you using? I’m not sure this will work with the Arduino serial monitor – I’ve never tried it. Try using Coolterm (Windows or mac) at 9600 baud. Its available free on the web.

March 18, 2012 at 3:40 pm #1719

blizard123
Member

It’s not the program I believe to be my problem. It’s when I go to configure it and from what I’ve seen and read in the serial monitor it’s supposed to display press $ to configure or something like that. Instead in any baud rate I go to it just produces a bunch of squares. I’m sorry for not being clear enough on that and thank you for the suggestion.

March 18, 2012 at 3:57 pm #1720

Riley
Keymaster

Blizard what serial terminal are you using?

March 18, 2012 at 4:22 pm #1721

blizard123
Member

COM 3

March 19, 2012 at 9:13 am #1722

jmnoeth
Member

Blizard, the serial monitor that comes as part of the Arduino tool set has some ‘guilty knowledge’ of the Arduino loader and trys to auto detect the speed of the serial link. The preprogrammed chip might not allow the serial monitor to get the speed set correctly. Try downloading ‘coolterm’ and using that; Setting the communications link to 9600 baud, 8 bits, no parity, one stop bit. If you google coolterm, you’ll find several sites from which to download it. There are versions available for Windows and Mac.

March 21, 2012 at 12:23 am #1723

blizard123
Member

Thank you it works now.

May 6, 2012 at 5:34 pm #1725

rickv
Member

i also installed preloaded grbl ATMega328p chip for my arduino but have no respond the rx led lights when sending $ command (‘$’ ) and nothing happens. using cool term ATM chip is in correctly help

May 6, 2012 at 10:06 pm #1726

Riley
Keymaster

Can you give us your exact settings? Arduino hardware… Coolterm settings etc..

Riley

May 6, 2012 at 10:55 pm #1727

rickv
Member

uno r3 coolterm settings com4 9600 8,none, 1 not sure what else u want to know coolterm is transmitting to uno and rx led blinks but no tx back.
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