This kit includes:
- 1x Smart – Coffee Circuit board (see specs by clicking here)
- 2x ESP32 modules
- 1x OLED Display Screen
- 1x Display mount (2 styles to choose from)
- Mounting screws and hardware
- Smart – Coffee Software ESP32 version
Please note: this kit does not include any sensors. For a full list of recommended sensors with purchasing links, see the forum page:Â click here
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Technical Specifications
Specifications of the Smart Coffee board:
Size : 166mm (6.53inch) long x 101mm  (3.97inch) wide x 30mm (1.18inch) high
Power in: 100~240VAC
On board DC power supply:Â 5VDC, 2A
On board 3.3V power supply:Â 1A
On board, Solid-Sate relays 100~240VAC live outputs:
- 2x Boiler element (10A)
- 1x Pump (10A)
- 2x Programmable relays (usually connected to solenoid valves) (1A)
Total combined output current limit from relays: 20A
- Element 1, and Pump combined max current: 10A
- Element 2, RLY1, and RL2 combined max current: 10A
7x 5VDC relay control outputs:Â (used to control external relays for high current loads)
2x Boiler element
1x Pump
4x Programable relays
Fuse: 2x   5x20mm, 10A
Inputs/Outputs:
- 4/6 wire Load Cell Input
- I2C display screen interface
- 2x Pressure transducer inputs
- 2x Boiler water level detection probes
- Brew Switch input
- Espresso mode selection input
- Reservoir water level detection options:
Reservoir touch-sensitive probe (for detecting water)
Reservoir float switch (compatible with NO and NC switches)
Ultrasonic water level detection
- Ultrasonic distance sensor (for measuring water level inside a reservoir tank)
- 2x MAX31865 temperature sensors (compatible with 2, 3, and 4 wire probes. PT100 and PT1000 series compatible)
- 6x User programable GPIO pins (M1, M2, S1, S2, S3, and PT3) write your own code to make use of these pins to really customize your coffee experience
- 7x 5VDC relay control outputs: (used to control external relays for high current loads)
- 2x Boiler element
- 1x Pump
- 4x Programable relays
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