Embedded engineering portfolio

Water Vending Machines
Maxi Water Vending MachineMaxi Water Vending MachineMaxi Water Vending MachineMini Water Vending MachineMini Water Vending MachineMini Water Vending MachineWall Water Vending MachineWall Water Vending MachineWall Water Vending MachinePower BoardPower BoardCentral PCB
Client

Product overview

Complex project for the development of hardware part and design of a water vending machines series.
We purpose decisions for 3 different installation options: indoor, outdoor and outdoor (mini).

This series is an excellent solution for business, since it gives the possibility for building a water purification vending network. As well was developed the water purification system, which is compatible with all three vending machines types.

The main objectives of this project were to develop a central PCB that controls the operation of the system of the following devices:

Provide collecting of temperature, lighting, humidity, pressure, movement, impact and water flow sensors data.
To communicate with a server through a wireless connection via the SIMCOM GPRS modem.

Result

Maxi water vending machine could be used for street installation. Is equipped with vandal-proof, waterproofed and dustproof case.
Main functionality: water purification and sales. Supports the three kinds of water for sale.
Additional functionality: insulation, (water) heating and lightning.

Mini water vending machine could be used for indoor installation. Is equipped with vandal-proof, waterproofed and dustproof case.
Main functionality: water purification and sales. We made the ergonomic design and simple service.  
The versatility of the system design of the spill allows to use most standard containers for loading.

Wall water vending machine special exclusive design of device let it be used in street location. Is equipped with vandal-proof, waterproofed and dustproof case.
Main functionality: water purification and sales. We made the ergonomic design and simple service.  

 

Technology & Work
  • MCU: STM32F207
  • Transceivers: HopeRF
  • Power: manages four 12V and two 24V channels
  • Data transmission: GSM-modem (RS232 and RS485 connection), Bluetooth
  • RTOS: Keil RTX
  • For software development and debugging, I have used "C" programming language.
  • Case made of steel (2 mm)
  • Ergonomic design
  • Powder coating

 

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