Yet another DYI Plato scale

[nikollou]

Hello, new member here found the forum via this project which I just wanna say is amazing! Great job @mper!!!

I am building a version based on the S3Mini where there will be a single LCD screen on the keggerator showing only the graphical bars and I will use the web/app to see/manage all the other details. I also have opted to use a single UTP cable for both scales and then a audio cable for the DS18B20 sensor, primarily to minimise the cable/connector sizes going into the keggerator since I found that getting two ethernet cables was more challenging. I have written a detailed wiring plan for this setup and I am attaching it here for anyone that may find it helpful.
I have also designed a 3D printable case and I will post it on Printables once I get it a bit more finalised, but I am attaching some photos of the prototype for now.

Software-wise I plan to add the following features and will make pull requests via github if you feel comfortable adding them to your main project:

1. Ability to define a third "fixed" wifi network outside of the two that can be stored on the ESP wifi module. Think of it like a "developer" wifi that whenever present the device will connect to that first before searching for other networks or requiring you to perform a wifi scan.
2. Ability to password protect the web page.

Once again, thanks for the amazing work @mper!!
Nik

 

[mper]

I have started to plan for the next generation of kegmon and would like to get some ideas and feedback. So far I have these points:

* Use a TFT touch display
* ESP32 based (probably an ESP32 s3 PRO)
* Up to 4 scales with scale detection in background thread

I have been looking for another option than the HX711 but I have not really found a good alternative that does not cost a fortune....

What would you like to see ?

 

[larsh]

I have started to plan for the next generation of kegmon and would like to get some ideas and feedback. So far I have these points:

* Use a TFT touch display
* ESP32 based (probably an ESP32 s3 PRO)
* Up to 4 scales with scale detection in background thread

I have been looking for another option than the HX711 but I have not really found a good alternative that does not cost a fortune....

What would you like to see ?

It's a pity CYD's (Cheap Yellow Display's) do not have more than 3 easily available gpio ports, and runs on ESP-WROOM-32.
If not, they would have been a really cheap alternative with touch screen available in different sizes.
What is wrong with DS18B20, except from missing humidity data?

 

[mper]

It's a pity CYD's (Cheap Yellow Display's) do not have more than 3 easily available gpio ports, and runs on ESP-WROOM-32.
If not, they would have been a really cheap alternative with touch screen available in different sizes.
What is wrong with DS18B20, except from missing humidity data?

Yes, I would need more than 3 pins for that many scales. The DS18B20 is a good and stable sensor. I'm not sure that one needs to support other sensors than that one. The question is how many ? Currently I support one sensor but one per scale base could be supported, not sure if that would add any benefits though.

 

[larsh]

New version of kegmon is now available on github

https://github.com/mp-se/kegmon/releases/tag/v1.1.0

Main change is update of Arduino libraries and some new features related to my other Brewlogger project (Pour logging and TapList integration)

Great!
On v1.0.0b2, I was not able to access from Ubuntu/Mint/RPi with Firefox/Chromium/Vivaldi. Black background.
Upgrading from an Android tablet with Firefox was ok.
v1.1.0 works fine on all my platforms/browsers.
Thank you!

 

[mper]

Great!
On v1.0.0b2, I was not able to access from Ubuntu/Mint/RPi with Firefox/Chromium/Vivaldi. Black background.
Upgrading from an Android tablet with Firefox was ok.
v1.1.0 works fine on all my platforms/browsers.
Thank you!

Thanks, but thats probably a but someone else fixed in one of the dependecies…

 

[Piilu kirves]

I have started to plan for the next generation of kegmon and would like to get some ideas and feedback. So far I have these points:

* Use a TFT touch display
* ESP32 based (probably an ESP32 s3 PRO)
* Up to 4 scales with scale detection in background thread

I have been looking for another option than the HX711 but I have not really found a good alternative that does not cost a fortune....

What would you like to see ?

Co2 pressures for kegs?
Co2 bottle scale?
Is It possible to use 2 esp 32 and combine data to only one display?
If More inputs are needed for scales...

 

[mper]

Co2 pressures for kegs?
Co2 bottle scale?
Is It possible to use 2 esp 32 and combine data to only one display?
If More inputs are needed for scales...

I'm working on a pressure sensor that I plan to integrate with the kegmon software to measure pressure. I already have my fridge controller integrated for temperature.

But i like the idea of allowing multiple devices to report into one display. I think I can do a design of 4 scales and make that work on an esp32 if I use the multithreading capability of the esp32 boards (one that has multiple cores). I have a prototype PCB (with 4 scales) in transit so I will see if this will work, if not then having multiple controllers reporting into a central device with display is a good option.