Write BT into slave register.

[einarbjorkman]

Hello,
I am looking to create the following setup:
-I load/create a desired roast profile in Artisan
-Have an Arduino as a slave with the Modbus RTU library
-Write (with Artisan) the desired bean temperature into one of the Arduinos registers from
-Update the/send a new value at a specified frequency
Is this solution possible and, if so, how would I go about creating it?
All help appreciated!

-Einar

[MAKOMO]

Yes. You need to take advantage of the MODBUS external PID support of Artisan. Details are in the blog post on the Artisan PID mechanism.

Essentially, you need to define the SV register (the slave/register your client expects to receive the target temperature) in the MODBUS tabs PID section (menu Config >> Ports, 3rd tab). There you can also specify registers to set the p-i-d parameters of your client and commands to turn the PID loop on or off from within Artisan (eg. from its PID tab). In that PID tab you can then choose where this target temperature is taken from, either set manual/static (eg. via a SV slider or buttons) or taken from the background or a Ramp-Soak pattern.

[einarbjorkman]

Hmmm I guess I am unclear about the terminology:

"If Artisan is configured to operate an external PID" --> does this mean Artisan is meant to have som control over the Arduino's PID besides just providing the desired value/SV ?
(I realize you are saying below this that it's up to the Arduino but I want to be completely clear here...)

also what is the "duty" or "duty signal"?

"It is just one UI for both operating modes. Thus if you configure in the MODBUS tab also registers to set the parameters p-d-i, the settings in this PID dialog will be send to those registers in the external PID."
OK, then I understand.

Thanks for continuous help- Einar

[MAKOMO]

Hmmm I guess I am unclear about the terminology:

"If Artisan is configured to operate an external PID" --> does this mean Artisan is meant to have som control over the Arduino's PID besides just providing the desired value/SV ? (I realize you are saying below this that it's up to the Arduino but I want to be completely clear here...)

Yes, Artisan is just forwarding the SV value to the external PID.

also what is the "duty" or "duty signal"?

What ever the PID computes. Did you read my post on the PID mechanism?

"It is just one UI for both operating modes. Thus if you configure in the MODBUS tab also registers to set the parameters p-d-i, the settings in this PID dialog will be send to those registers in the external PID." OK, then I understand.

Thanks for continuous help- Einar

[einarbjorkman]

Ok, so I have followed your instructions and attempted to provide a SV to the Arduino.
I import a CSV file of an example roast.
Use the "control" to configure the PID and then click "start" or "on".
However Artisan then prompts me to remove the preloaded profile (csv. file) or background, clears it, and then starts the recording.
How do I avoid this and just allow Artisan to follow the values of the uploaded profile??

-Einar

[MAKOMO]

You can only re-roast a background/template profile. Load the csv file, save as Artisan .alog profile. Load this one into the background.

[einarbjorkman]

hmmm, I am still not having success. Here are my exact settings and my procedure:

I have tried initiating with both "start" and "begin", however the background profile is cleared in both cases and I'm reading the same value constantly in holding register [0].
Any suggestions?

-Einar

[einarbjorkman]

We have managed to solve it now, thank you for your help Marko!
It was done by "switch profiles", going to control and enabling "start PID on charge", and then clicking charge when started.
Besides the settings you helped with, that is :)
kind regards- Einar

[poundy]

thats because you loaded the profile, not loaded into background. Switch then moves it from the active profile to the background.

[poundy]

The two signs of that are the "profile background" dialog above does not have a filename at the bottom of it, and that the message on the last screenshot says the file was "loaded" not loaded into background.....

[einarbjorkman]

Ok, that makes sense.
Thank you for the info :)
Where would I select the option "load into background" directly without having to switch afterwards?

[poundy]

using the "load" button in the second last dialog box you showed, the "profile background" dialog. You can change background profile at any stage - although in your scenario that makes little sense since you are using that to follow the roast - and there's about 6 ways to get into that menu, Ctrl-B (for background) is my favourite way.

[fcebreros]

Hi, it is possible. https://lukasgrasse.medium.com/how-to-make-an-arduino-controlled-coffee-roaster-f6a3334fd7d5 there you can find info on how to do it. Best FC

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On Thu, Apr 28, 2022 at 9:37 AM einarbjorkman ***@***.***> wrote: Hello, I am looking to create the following setup: -I load/create a desired roast profile in Artisan -Have an Arduino as a slave with the Modbus RTU library -Write (with Artisan) the desired bean temperature into one of the Arduinos registers from -Update the/send a new value at a specified frequency Is this solution possible and, if so, how would I go about creating it? All help appreciated! -Einar — Reply to this email directly, view it on GitHub <#871>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ANSEK446TLBAFWKR3Z47PTDVHKPBNANCNFSM5USUE7YQ> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>