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CharcoalRoaster
05/14/2019 1:46 AM
I just roasted 500g of Mocha Mattari -- it's on it's third day of rest. Should be cracking into it tomorrow AM and I can't wait!

John Despres
05/12/2019 2:51 PM
Good evening! What's roasting? Yemen Mocha Mattari in my cup today.

snwcmpr
05/12/2019 5:59 AM
Hey Ed. BBQ grill

homeroaster
05/11/2019 1:47 PM
Hey, y'all! The Homeoroaster here. What's hot that I need to look at? pouring

allenb
05/11/2019 7:54 AM
Hi nano and welcome to HRO! I would post your message in HUGS which is near the end of the Discussion Forum list.

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Make "CR3" part of TC4 family?
mg512
Hi all,

as some of you know, I have made a TC4-like Arduino shield, so far codenamed "CR3". I began offering this to people on here earlier this year when the original TC4 became unavailable. The whole thing started very ad-hoc - there was people looking for boards, and I had a few extra ones left over.

Going forward, I want to make things more thought through and clearer for everyone. To this end, I am thinking it would make sense to officially make the board part of the TC4 "family". It's a bit like the TC4C - the board is essentially a TC4 + extras. Hence I was thinking of renaming it "TC4X" or "TC4+" or similar.

I am also planning to make the schematics and board layout files available on github under a CC-BY-NC-SA license, so that the project will stay available even if in the future I myself get tied up in other things (just want to sort out a proper name for the board before I do that).

What do you all think? I realise that the TC4 is a community project, and I want to make sure that everyone is happy for me to get involved in this way.

Cheers,
Matthias
 
https://www.tindie.com/products/15798/
fransgo
Wonderful initiative!
 
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renatoa
You are not alone, a TC4ESP will follow soon Grin
 
mg512
Ah, yes, I'm considering something like that in the long term too. ;)
 
https://www.tindie.com/products/15798/
JackH
I think it is a good idea to keep a general family name and add extensions to show the differences.

Thanks Matthias, for keeping it going, it is a worthy device.
---Jack

KKTO Roaster.
 
mg512
Thank you for your kind words, Jack. :)

And great - I take it everyone is happy for me to make this a TC4 variant. :) I am hereby naming the board the "TC4+" then. More updates to follow.
 
https://www.tindie.com/products/15798/
greencardigan
I agree that a variation of the TC4 name is a good idea. TC4+ sounds good to me.
 
CK
Good name choice. Creates anticipation for the extras this board has...
 
mg512
Great! Thank you, everyone, for the wonderful comments and encouragement.

The TC4+ is now available on Tindie! https://www.tindi...no-shield/

And the source files are on Github: https://github.co...ter-shield
 
https://www.tindie.com/products/15798/
marcov
Hey guys, it's great to hear about a potential TC4ESP. I'd suggest using the "new" ESP32 SoC.

Are you thinking to leave the headers for Arduino so that it could still be used as shield? Probably this would make sense.

I am willing to contribute at this porting or rewriting the existing aArtisan FW for the ESP.
 
mg512
marcov wrote:

Hey guys, it's great to hear about a potential TC4ESP. I'd suggest using the "new" ESP32 SoC.

Are you thinking to leave the headers for Arduino so that it could still be used as shield? Probably this would make sense.

I am willing to contribute at this porting or rewriting the existing aArtisan FW for the ESP.


I have been using an ESP32 for a controller for my Gaggia Classic espresso machine, so I already have a lot of code for temperature control written for that, and some PCB designs. ;)

What do you mean by Arduino headers? As in, put an Arduino header on the board and route it to some ESP32 pins? I don't think an ESP32 would easily work with Arduino shields for a variety of reasons, starting with different voltages. Or you mean make it a shield that could work with both ESP32 and Arduino? More or less the same technical obstacles apply. An additional thing there would be that there isn't a standardised pinout for ESP32 modules, like there is with the Arduino Uno platform, and no further "shield"-ecosystem around it for that reason. I think with an ESP (8266 or 32), it would make more sense to take the TC4C approach, and put the controller directly onto the board. Could still be programmed via USB and the Arduino IDE, and could retain full pinout for hooking up more hardware, of course. But making it a "shield" would just create confusion I think, if people don't get the exact same ESP board, their pinout might be completely different, and the shield wouldn't work.
 
https://www.tindie.com/products/15798/
renatoa
Me too evaluated using an ESP as an Arduino shield, and there is no benefit.
I have no potential board to stack with this hypothetical shield, appealing enough to make me consider this way.

There is a problem with ESP32 though, it is still not enough mature for such task.
Tried to use it for the TC4ESP project and at least two big missing made me abandon it, and stick with the older ESP8266, at least for the first draft.
This is unfortunate, because ESP32 features BT, a lot simpler to use for Artisan interface than MQTT approach.
 
JackH
renatoa wrote:


This is unfortunate, because ESP32 features BT, a lot simpler to use for Artisan interface than MQTT approach.


Most people here do not understand these acronyms. Can you explain?
Edited by JackH on 01/28/2019 12:32 PM
---Jack

KKTO Roaster.
 
marcov
mg512 wrote:

What do you mean by Arduino headers? ...
Or you mean make it a shield that could work with both ESP32 and Arduino?


Correct, I thought that having a board that could be used either as an Arduino shield or as a standalone board (by populating it with a ESP-12 module) would be interesting. The main advantage that I see is that it would still be backward compatible with the existing Arduino implementations, and at the same time it would allow hackers to experiment something new :)
Voltages difference is the most annoying thing. Level shifters are a solution, but would make the design not so attractive in the end.

renatoa wrote:
There is a problem with ESP32 though, it is still not enough mature for such task.

Are you talking about ESP-32 specific features (e.g. BT) that are still not supported? Or is it lacking features even when compared to the old ESP8266?
 
marcov
JackH wrote:

renatoa wrote:

This is unfortunate, because ESP32 features BT, a lot simpler to use for Artisan interface than MQTT approach.


Most people here do not understand these acronym. Can you explain?


BT is an abbreviation for Bluetooth.

ESP32 is a chip containing in a single package a microcontroller, a WiFi radio and and a Bluetooth / Bluetooth low energy radio. You can buy ready-to-solder ESP-32 modules for as low as 3$, and ready-to-use development boards for 5$.

MQTT is a protocol commonly used to read sensor data / write commands to ESP modules over WiFi. It's popular because it abstracts from devices addressing details (e.g. you dont need to know the IP of your WiFi node) and because writing code using MQTT is very easy.
 
renatoa
BT = Bluetooth, is supported, tried it and it works, even if not performed a full roast 15 minutes test, to be sure is connection does not drop.

What I don't like about ESP32 is the Arduino compatibility, unfinished, and still in progress, somewhat... too slow addressing issues that seems never ending.
Only the lack of AnalogWrite make many people thinking about ESP32 creators "what do they have in mind?!"... to cut the main PWM support that everyone that pretend to be compatible with Arduino must offer, to not lose 90% of mass projects already done.
The replacement solution library offer is lame, people simply want the old known stuff.
The most annoying part of this story is the incertitude seed in many people thoughts... "if they dropped AnalogWrite, what other many <Ester eggs> could be hidden elsewhere"... that could make me drop the project when I am near deadline...
And they abandon using ESP32, as me.

MQTT is an internet protocol:
https://en.wikipe.../wiki/MQTT
... that seems to be established as the most preferred communication way in the IoT (Internet of Things) world, i.e. intelligent home devices.
Unfortunately, MQTT is not so well supported in the PC world, not for average Joe.
Lots of support from and to programmers/developers, but not so simple to use as plug an USB or pairing a Bluetooth device.
So, to use MQTT with a roaster someone should install additional software (that is not yet written) as a bridge between Artisan or another traditional roasting software that wasn't been developed from the roots with intelligent sensors in mind.
 
mg512
Bear in mind that ESP32 is Bluetooth 4, aka Bluetoot Low Energy. This is not the same as classic Bluetooth, and in particular, at least as far as I know, doesn't have a simple Bluetooth Serial profile. As a consequence, I don't think it's possible to connect directly to an ESP32 in Artisan or similar, as it won't show up as a serial interface on the computer. So there would be some software development required on the Artisan or host computer side - at which point indeed one might as well go with WiFi and some IP based protocol, whether that be MQTT or something else.

Personally I have found the Arduino ESP32 support perfectly fine.
 
https://www.tindie.com/products/15798/
JackH
Thanks for the explanation. I was trying to make things a bit clearer for everyone. Sometimes acronym-speak can be confusing.
---Jack

KKTO Roaster.
 
CharcoalRoaster
I recently picked up an Arduino Uno board and was about to purchase the TC4 before I saw this post. Can someone simplify for me what, if any, differences there are between these two board in a *simple* way?
 
mg512
CharcoalRoaster wrote:

I recently picked up an Arduino Uno board and was about to purchase the TC4 before I saw this post. Can someone simplify for me what, if any, differences there are between these two board in a *simple* way?


The two main differences are:

1: The TC4+ has support for an optional Bluetooth module, if you want to connect to your roaster wirelessly.
2: For roasters that have a DC fan motor, the TC4+ has everything on board to control those, which makes things easier in those setups. This is especially relevant for many popcorn machine based roasters, though I have also heard of some other cases where a DC driver was useful. In a nutshell, your roaster's fan will be powered either by mains 110V/230V AC (alternating current), or by a lower-voltage DC (direct current). If it's AC, both the TC4 and TC4+ will work the same way (but both will require extra hardware, which you could buy pre-built, e.g. on Tindie). If it's DC, then the TC4+ has everything on-board to control the fan. The TC4 could still control a DC fan as well, but would require extra hardware (a small circuit, which you would have to build yourself).

Or, in very simplified terms, TC4+ = TC4 + Bluetooth + DC fan control.
 
https://www.tindie.com/products/15798/
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