A Device that Provides You with Desired Water.

⭐ Before getting started, watch our demo video first!

Given a drink, it’s hard to adjust the concentration manually.

With sensor, actuator, and computer, using the technique of automatic control, we're able to easily obtain any specific concentration of liquid that we want!

✔️ Internet of Things: Bluetooth Control.

✔️ Real-time precise and stable control.

✔️ No calculations need for customers.

✔️ Set up your favorite favor anytime.

3 different modes: Full Mode, Works without Computer, Works without Computer and Phone

• Connect to Phone via Bluetooth
• Start/Stop by User Button on STM32 or Phone
• Tune Parameters by Phone
  • Customized Target TDS Value
  • Customized PID Control Parameters
• Display instant TDS Value and Graph on the screen

• Connect to Phone via Bluetooth
• Start/Stop by User Button on STM32 or Phone
• Tune Parameters by Phone
  • Customized Target TDS Value
  • Customized PID Control Parameters

• Start/Stop by User Button on STM32
• Use onboard default parameters
• Parameters with fine-tuned values

• Real-time Feedback PID control
• BLE Programming

• Multi-Thread Programming
• PWM Servo control
• TDS Meter
  • Analog to Digital Input
• Real-time OS
• Interrupt I/O
• Programming I/O

• Mechatronics
• Valves with Robotic Arm and Claw Control

To achieve stable and precise control, we use PID controller to compute the PWM duty cycle signal. And with some method of linearization, we can obtain a better result.

• Bluetooth Programming

  • https://forums.mbed.com/t/how-do-you-define-gatt-descriptors-using-gattcharacteristic-attributes-gattattribute-class/9809

• Visualization by using MATLAB and USB Serial Port of STM32

  • https://www.mathworks.com/matlabcentral/answers/421759-how-to-read-com-port-data-continuously-and-plot-the-data-live-in-matlab
  • https://os.mbed.com/handbook/USBSerial