Wireless module for parking guidance system

Hi,

I want to design a parking guidance system for a college.

There are 3 parking sections in the whole parking area.

The design specification should be as I imagined:

  1. Control box containing: the main display, arduino and rf reciever
  2. 3 nodes containing: 2x ultrasonic sensors, arduino and rf transmitter

Now, since the nodes should be in a box so no one reach its parts.

Which wireless module should I choose ? e.g. nrf24L01 with antenna or the Si4432, or other modules.

I want to complete my school assignment?

Nope, it's a work task. I'm a part of the project team.

Has anyone on the team actually tested communications for the distances involved? That must be done as part of the decision for devices that will be used.

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No, but I have some nrf24l01 without the antenna.

My guess is that the nrf24l01 with the antenna could be similar to the Si4432, since both have max range upto 1000m.

So I thought they would give the same functionality and performance, is my conclusion right ?

What would be the result if your guess is wrong?

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β€œ projects β€œ are about how you find out/research stuff and making you think . It’s about a problem solving Exercise and not just making a device . How you go about it is where the marks are .

Get your options for rf and make a table of good points and bad based in what you want it to do.
From your list make a choice and why .

When you write it up , you include that reasoning - that is far far better than saying β€œ I just asked someone β€œ.

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HI,

What do you mean?

  1. A car approaches the car park and a system tells the drive where to park?
  2. The system helps the driver park in a particular space?
  3. The system counts the number of cars in and out of the carpark and informs the driver if there is space or not?

What?
Can you please do a basic diagram of how you are going to layout the hardware?
How will you power the hardware?

Thanks.. Tom... :smiley: :+1: :coffee: :australia:

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Nothing critical, I will then have to do more testing.

I now haven't done any testing, but I'm sure that either the nrf24L01 or the Si4432 should work eventually.

My only concern now is that if I used the nrf24L01 with the antenna, and put all that inside a box sealed in a way to prevent dust and rain.

My question is, would it a problem for the nrf24L01 with the antenna to be in that closed box ? would that affect the antenna functionality ?

Pretty much guaranteed! Everything affects antennas. Remember you are dealing with transceivers. they must receive as well as transmit.

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Yep, I agree with you especially testing rf stuff is new to me, I haven't done any rf range or rf barrier problems.

But as I mentioned I don't have a problem with the range since the distances are lower than 500m, so the nrf24L01 with the antenna should cover the area.

My concern is that I have to put the electronic stuff inside a metal box sealed to prevent dust and water. Also to secure the project from the students who might act un-responsibly and dismantle or abuse the electronic parts.

Hi Tom :slight_smile:

Thank you for your interest in my project.

Number 3.

Like this picture:

image

Just cover sections of the parking area. In the college there are 3 sections, each section may have maybe up to +30 parking slot.

The design would use couple ultrasonic sensors to count the enter/exit cars.

I found this draft in a Canadian company, they have a very good sensing system, this is exactly what the college want to do:

Why metal?
They make plastic cases that should fit your criteria.

Tom... :smiley: :+1: :coffee: :australia:

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Hmmm, yep ... that shouldn't be a huge deal in the project design.

And you're right plastic is better than metal, since metal will get rusty if it isn't painted with a good waterproof material.

Yes, I remember now, the electric main counters' covers mounted to each house in my country is in plastic material.

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