Small device to transmit a code to smart phones (IOS, Android, ...) without the need of manual pairing

I need a detailed advice on how to solve the following requirements:

We need to transmit a unique code that can be received by smart phones (major OS platforms, best case: all platforms)

No manual pairing should be necessary by the owner of the receiving smart phone

Ideally the transmission should be possible from the smart phone of the person that transmits the code

There should be no security risks to receiving and transmitting smart phone

The transmission range should be as a large as possible, but must be minimum of approximately 25 meters

If a seperate device is required to transmit the unique code;

- the device must be as small as possible

- battery life should be as long as possible, best case several months, worst case 24 hours (if rechargeable) or a approx a week with batteries

- if battery life is shorter than 3 months, the device should be rechargeable or use batteries

- the device should be cheap to produce

- the device should be able to pair with the smart phone of the owner to transmit the unique code into the device

Please describe the solution with regard to the requirements mentioned above. Also possible altnernatives, which technology is to be used, compatibilty to platforms, reliabilty, risks and cost. Please indicate if you use off-the-shelve products and describe their profile with regard to the above

Færdigheder: iPhone, Mobile App Development, Objective C, Produkt Design, Trådløs

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Om arbejdsgiveren:
( 0 bedømmelser ) Belgium

Projekt-ID: #4059582

8 freelancere byder i gennemsnit €201 for dette job


Hi,sir. Please check my pm.

€250 EUR in 5 dage
(28 bedømmelser)

Hey , Thanks for posting. gone through with the requirement and we understood. check your private message board for detail proposal. [url removed, login to view]

€200 EUR in 5 dage
(9 bedømmelser)

Hi, We are group of 10 people having work experience of 1-7 [url removed, login to view] are working in one of the best company in the field of IOS app [url removed, login to view] are looking for some independent [url removed, login to view] in advance.

€125 EUR in 3 dage
(3 bedømmelser)

It would be Great to work with you. Please see PMB for further details. Thanks.

€399 EUR in 9 dage
(2 bedømmelser)

please check my pm

€80 EUR in 5 dage
(0 bedømmelser)

Hi, do you need a professional help?

€200 EUR in 5 dage
(1 bedømmelse)

we will provide you complete Solution as per your need. For more detail please check our message where you can find our previous work too

€150 EUR in 2 dage
(0 bedømmelser)

We have expereince team in your project andd we can complete your project as you describe. Please dont forget to check your private messages. Thanks

€200 EUR in 4 dage
(2 bedømmelser)