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Robotic Kitten wrote:

@sloppyjosh I have a question about about this section of the codehttps://github.co...#L232-L236 Can an "unsigned long" be "negative"?
Assuming, the "overflow", maybe do the following?

Dan N wrote:

The answer is no, an unsigned long can't be negative and the if statement will never be true. That makes the code unintentionally correct!

It's not intuitive but because all variables are unsigned and the same size, the value of duration for this subtract is correct in all cases with no correction necessary (the if statement can be removed):

sloppyjosh wrote:

I put an acrylic front on the roaster and put 225, 340, and 455 grams of beans in to see where the probe would sit in relation to the bean mass... IMO, this may be the culprit for why the temps seem to read low.



See what ya'll reckon.. I'll probably have the clear front on it a bit longer so if you want to see anything else that I didn't do in the video let me know and I'll try to do it.

ctjameson wrote:

Now the problem is I'm really new to the world of roasting as a whole. Can anyone give me any pointers on where to look for generic direction for how to roast specifically with Artisan? Great work here and I'm really stoked to get started roasting in this thing.

TIA!

renatoa wrote:

In my Skywalker control panel cable the red wire is NOT plus 5V, so beware !
I think they use a non standard usb cable, red wire is Rx, and placed next in sequence near black (ground) wire, instead D+ wire in a standard USB, and not opposite site of the plug, as should be.
There is no white wire in my Skywalker control panel cable, btw.
Please specify if you used a standard usb cable, cut for this project purpose, or reused the original control panel cable.

I would not connect at all the supposed plus wire that comes from skywalker to the Arduino, which is powered via usb from computer anyway...

renatoa wrote:



Now the problem is that you should first learn about coffee roasting, as a whole.
Artisan is just a tool to assist you, not an AI doing the roast for you.
You are asking how to use a hammer without knowing what is a nail.

LE: Please also notice that the IR roasting technique used by this machine is a whole universe by itself, having very little in common with all the other roasters of the market.
More on this here: https://homeroast...post_77699
Thus, even the generic "roasting coffee" learning, from classic roasting resources found on the internet, would be of relative help for this machine.
I have a post on this subject here: https://homeroast...post_77806

Mike_Mathis wrote:

ctjameson, I loaded your settings and looked at them. Is the program Josh made going to be able to use those buttons to set the heater and fan to those set points? I realize they are redundant to the sliders, but if what you have is valid, one could use the sliders for 5% adjustments between the buttons. Does this make sense?

Mike_Mathis wrote:

Looking good. My Leonardo should be here maybe tomorrow. I have my USB cable ready. I guess I'm going to get a crash course in soldering little bitty wires. Did you connect the red wire to 5V as Dan did?

renatoa wrote:

Another front of moding opens... the charge chute.
For those who haven't removed the front panel yet, it's a separate, removable sheet metal assembly, that can be redesigned to suit anyone's vision of charging easy.
Check pictures attached and share your ideas.
Personally, the most annoying part is the the front turned-in edge, red arrow pointed ... I don't feel any need to have it there... will disappear from my cartoon prototype I am sketching atm.

renatoa wrote:

Printed from what ? are you aware that bottom of the funnel will be exposed to high temperatures, close to 200C ?