The main aim of this project is to design a voice based automatic hot/cold water dispenser system using Raspberry pi3 and by using piezo electric plate. The controlling device of the whole unit is a Raspberrypi3 processor to which input and output modules are interfaced. Raspberrypi3 has Broadcom BCM2837B0, Cortex-A53 (ARMv8) 1GB LPDDR2 SDRAM 1.4GHz 64-bit quad-core processor, dual-band wireless LAN, Bluetooth 4.2/BLE, faster Ethernet, and Power-over-Ethernet support (with separate PoE HAT). This system consists of a raspberrypi3 processor which is controls the whole system. HC-05 Bluetooth module, DS18B20 temperature sensors, IR sensors, Peltier plate, relays are interfaced to the raspberry pi3 processor. When the user gives the voice input from android Bluetooth mobile application. This data received by hc-05 Bluetooth module and fed s same to the raspberry pi. Then raspberry pi checks the glass status using IR sensor The tap turns on only the glass is in front of tap otherwise it’s not possible. Based on the voice commands raspberry pi will trigger the relays to dispensing the cold/hot water for drinking. Here relay works as a switch to ON/OFF the water pump which trigger by the raspberry pi as per user request. And monitoring the temperature value of water through ds18b20 sensor and maintaining the water temperature in certain limits through temperature control circuit. To achieve this task raspberry pi3 loaded program written in embedded C language.

    The major features of this project are:

• Using Raspberrypi3 processor to achieve this task.
• Using Thermo electric plate to make the water heat and cold
• Using IR sensor to detect the glass.
• Using Relays to dispenser.
• Using DS18B20 sensor to measure the temperature of the water.
• Using hc-05 Bluetooth module is uses to receive the voice input.
• Using Bluetooth mobile application to gives the voice input.

Software’s used in the project:

1. Python Programming.
2. Embedded Linux operating system.
3. Express SCH for Circuit design.

     

   

Block Diagram:    

   

 

video: