Freelance projects

Freelance projects

Development of a controller for a water vending machine.

Embedded Systems & Microcontrollers — incorrectly specified categories?

22 USD

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It is necessary to develop a controller for a water vending machine. With the ability to manage the purification system and accept both cashless and cash payments. Below is a list of devices that need to be controlled.

1. Electromagnetic valve 24 W (normally closed, activates when the water preparation pump starts, and allows water to the pump)

2. Dry run sensor 24 W

(In the absence of water or low pressure, it disconnects the preparation pump)

3. Water sales pump 24 W

(When money is inserted and the START button is pressed, water flows, STOP accordingly stops)

4. Lower level float 24 W

(When activated, it closes the money acceptance, when activated it connects)

5. Upper level float 24 W

(When activated, it disconnects the water preparation pump, i.e., signals a full tank, when activated it disconnects)

6. Water meter 24 W

(Counts the amount of water dispensed, according to the amount inserted)

7. Electromagnetic valve 24 W

(after the meter, normally closed, opens when the START button is pressed and closes when the STOP button is pressed)

8. Water preparation pump 24 W

(If there is no water pressure in the system, it disconnects, if the upper level sensor in the tank does not activate, water purification occurs)

9. Coin acceptor microcoin sp-3 cctalk or pulse

10. Bill validator nv9-usb cctalk

11. Rfiid card reader type EM-Marine

Support for GSM module is needed for data transmission to the API for telemetry connection.

Proposals 4 Discussions 2

Pavel Litvinov

2 0

Projects -
Rating -
Rating 212

Budget: 1000 UAH Deadline: 1 day

There is a ready-made solution with a control panel.
I can send the details.

Olexandr Basalaiev

4 0

Projects 4
Rating -
Rating 436

Budget: 27000 UAH Deadline: 100 days

I made vending prototypes.
Well, in theory, you still need a PRRO.
The ability to pay cashless.
They didn't mention whether the screen will be touch or regular (and control with buttons).
In theory, vandal resistance (not mandatory, of course - so that some alarm triggers upon impact).
EM-Marine cards - is this a bonus or balance card for the client - does he first top it up and then get change and bonuses on it?

Volodimir Bartosh

229 4

Budget: 27000 UAH Deadline: 20 days

Hello.
I am ready to develop on ESP32 with SIM800L + 8-channel relay board + UART converter for cctalk.
Other controllers can be considered.
Please write in private messages. We will discuss the details.

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Pavel Litvinov

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