Smart - Coffee: Arduino Mega version

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Last Post by Schematix 6 months ago

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Schematix

(@schematix)

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Buy Smart Coffee for Arduino Mega here

PLEASE NOTE:

The latest version of Smart-Coffee for ESP32 can be found here: Click here

Smart - Coffee: Arduino Mega Version is highly customizable software that runs on an Arduino or similar microcontroller to control the various functions of an espresso machine.

The software can be configured to replace the factory controller functions such as:

Control the boiler pressure using programmable PID or PWM logic
Check the boiler water level through the factory-fitted probe
Refill the boiler by activating the pump and refill valve
If a water reservoir tank is present, it can check the water level using a probe OR via a switch. If the reservoir is empty, the element and pump will be disabled until the reservoir is refilled

In addition, the software can add extra features such as

OLED display that can show pressure, temperature, water tank level, mode, pump & element icons, and more in both metric or imperial units
Pre-infusion cycle what can be customized to pre-infuse the coffee grounds at low pressure before extracting the shot (activated when Espresso mode is ON)
Espresso Mode, which can be customized to stop the pump after a programmable amount of water is dispensed.
Flow meter that can keep track of how much water has been dispensed
Espresso timer that automatically stops the pump after a programmed amount of time
Water reservoir level can be measured using an ultrasonic sensor and printed on the display. No more manually checking to see if you need to refill the reservoir tank!
Pause a boiler refill from happening when an espresso shot is being made
Temp sensor that can be used to measure any temperature on the machine
Safe mode ,which can be programmed to shut down in the event the pressure and/or temperature exceed the programmed limits

Buy Smart Coffee for Arduino Mega here

Download a preview version of Smart Coffee software here

(The preview version allows you to view the Setup and Guide pages before purchasing)

Watch the video to learn more about smart coffee here

Video Playlist for configuring Smart Coffee here

Espresso Machine Compatibility:

Smart Coffee should be compatible with most single-boiler (aka heat-exchange) machines that have the following hardware:

Water Pump
Solenoid valve (to refill boiler)
Heating element
Boiler water level probe
Brewing switch

If your espresso machine uses a currently unsupported hardware configuration, you can submit a request below to have your hardware configuration supported with a future update.

UPDATES to Smart Coffee:

V2.0

First Released Version

V2.1

Added the option to use temperature as the target for the boiler element control.
Added the option to disable pressure safety limits.
Added the option to disable the pressure transducer.
Renamed "TEMPERATURE_SAFETY_FEATURE_ENABLE" to "TEMPERATURE_SAFETY_LIMITS_ENABLE"

v2.2

Refined and optimized logic
Updated pressure reading units to display 0.0 resolution
Changed printed display value "Kpa" to "kPa"
Added multiple attempts to connect to max31865 temp sensor
Updated serial printing logic
Removed obsolete serial printing commands inside the brewing logic

DOWNLOADS:

Download STL files to print the SH1107 display mount here
Download the wiring diagram here
Download a preview version of Smart Coffee software here

(The preview version allows you to view the Setup and Guide pages before purchasing)

WIRING DIAGRAM:

Adafruit MAX31865 board configuration: https://learn.adafruit.com/adafruit-max31865-rtd-pt100-amplifier/rtd-wiring-config

FAQs:

Will there be updates for Smart Coffee? We've reached the limits of the Arduino Mega platform, and thus moved to an ESP32-based platform, which allowed for even more options. The mega version will still be supported; however, further development will be made on the ESP32 platform.

My machine has a different hardware configuration, will Smart Coffee support it in the future? One of our goals is to have Smart Coffee be highly compatible with most espresso machines. If your espresso machine uses an unsupported hardware configuration, you can submit a request to have your hardware configuration supported with a future update.

Do you offer technical support? No, we do not offer individuals technical support for installing Smart Coffee. Our videos, guides, information, and software are supplied for educational purposes only.

Are there any warranties given or implied? No. Smart Coffee software is supplied for educational purposes only.

Are future updates free to download if I purchase Smart Coffee? Yes, once you buy Smart Coffee software, future updates will be free to download. As the project evolves over time, there may be variants of Smart Coffee, for example, ‘Smart Coffee – Dual Boiler edition’ which may require a separate purchase.