Prepaid solar system

$1500-3000 USD

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Opublikowano

ponad 9 lat temu

$1500-3000 USD

Płatne przy odbiorze

Hi Our company sells and distributes small solar home system. We work with a chinese factory who makes our small solar system. We are now planing to add more function on our solar system,but that function needs hardware and software program to work and the factory we are working with cant make that system. the function we want to add on our solar system is prepaid function,wich means costumer must buy a code from us each month to make the system work. by that costumer pays monthly instalment payments. how the system will work in general: Costumer buys the solar home system for lets say at 50% discount from us after using the solar system for a month,the system will not work and needs a code. then the costumer must buy a prepaid code or pasword from us wich he will put it in the solar system,and then the system will work for another month and so on until the system is repaid. The codes or the passwords will be put on scratch cards wich the costumers can buy from their local dealer wich we will supply to. Software function: *integrate and comunicate with the solar system unit *generate paswords for different plans like: $5,$15,$20 etc What we are looking for is a developer who can develop this system,and find a way to integrate it on our solar systems. We have the solar system,and if needed we can suply a sample There are company's who offer this kind of solar system like: [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL]

Electrical Engineering

Embedded Software

Microcontroller

PCB Layout

Identyfikator projektu: 6356941

Informację o projekcie

31 ofert

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Aktywny 10 lat temu

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31 freelancerzy składają oferty o średniej wysokości $2 886 USD dla tej pracy

@MikroStar

hi, i am an electrical engineer. i have expertise in embedded system design.i can help you with this project. Please check my profile for my previous work experiences. let me know if you are interested in the bid so we can discuss the details further. regards

$7 000 USD w 40 dni

4,8

(73 opinii)

7,7

@k03ak

A proposal has not yet been provided

$2 368 USD w 30 dni

4,9

(30 opinii)

7,1

@VeterNeba

Hello. I've just reviewed your project and found it very interesting. I'm a leading engineer in a team that provide R&D in the field of embedded and measurement systems based on MCUs. We have done projects in the field of the measuring and controlling different environment parameters. This project is very intresting to us. But I have some questions about your project: 1. Do you want to each solar secure module to communicate with a central server to check code validation? 2. Should we use a scratch-card system or may choose the other customer validation method (NFC/RFID, QR for ex.) 3. What is goal cost of this solar secure module? 2. Do you have a more precision description of your project? Waiting for your answers and invites. I'll be happy if my skills will be useful for you. About me: --- R&D (principle, software, hardware) for complicated scientific and industrial projects. 1. Strong experience in R&D of the embedded electronic systems. 2. PhD in electronics 3. Excellent in C (for embedded systems) 4. Excellent in Java SE, ok with Python 5. 6 years in this field The most important projects in portfolio: --- - smell's measurement system for airplanes (for "Airbus", Germany); - humidity precision measurement device (SRI, Ukraine); - biogas control system with Bluetooth (Germany); - small-size environment information system (Germany). Note: I can propose finally definitions of the all terms, only after creating a technical specs of the project Regards, Dr. Roman K.

$2 500 USD w 65 dni

5,0

(5 opinii)

5,2

@Talhaaa

Hi, Thanks for the invitation. I am feeling glad to bid on this project. As we have already prepared the system to launch commercially in rural areas of Pakistan. We have prepared the prototype. I have firmware developer and hardware designer and all the necessary basic design of the product. But unfortunately after commercial and legal evaluation, we decided to step back. There is too high risk that anyone can hack into the system easily and bypass lock controller and police system is very weak in rural areas. Nevertheless, system can work in areas where law and order situation is very good. We will be glad to develop the complete solar system including lock controller for you. Please give me your email id where I can share with you the technical write up of our product features and working functionality. Our product model is almost the same as of Azuri model, we used their product as a benchmark in preparation of prototype. Moreover, we are a team of electrical and electronic engineers with 5 years of experience in product design and development. We have also developed solar charge controller 10A, 500VA sinewave UPS and 10A battery charger as end product design and our products are available in local market. I am ready to start the project, waiting for your response. Regards Talha

$2 000 USD w 30 dni

4,8

(23 opinii)

5,4

@mamdouhmaitah

yes we can, but till me if the prepaid number will activate by the phone or the solar system connect with company with cable of network, if not how going add new codes in the future anyway, we make the same system in domain of electric, the user buy card which connect direct to the suppliers of electricity if the user send the number of card as SMS, to pay his electricity bill, we able to us any type of microcontroller, arduino, pic, AVR, and r pi, we decide to use pic microcontroller with gsm, or WiFi shield

$3 666 USD w 30 dni

5,0

(7 opinii)

4,6

@alexanderkf

Hello, This is my proposal the system that cuts the power should be integrated in the solar panel. And I mean in the material that the solar cell are in. Otherwise the system can be very easy bypass and the solar panel reused. I have over 8 years experience in the automotive industry in designing products. I can help you build your design Have a Nice Day.

$3 000 USD w 30 dni

5,0

(24 opinii)

4,8

@ElectroStrom

I am an embedded programmer with 4 years of experience. from what I understand is that you require to secure your solar system such that it works based on the monthly subscription by the user. I can provide that and integrate that with your product. please contact me to discuss details. PS. this is the same freelancer that you invited to this project (uzair11235)

$1 500 USD w 21 dni

5,0

(8 opinii)

4,4

@botzindia

Hi, We are a team of electronics&embedded engineer with more than 10 years of experience in designing and developing various digital and embedded systems... We have done a lot of projects in Electrical Engineering, Embedded Software, Microcontroller, PCB Layout. Also we conduct many workshops on Embedded Software, Microcontroller..As a part of our training program we developed Arduino/PIC based Programming boards and driver boards for sensors. Since we help engineering students to complete their academic projects, we have experienced with a lot of sensors, components, PCBs etc. So we can assure you that this project can be done 100%perfect....:-) Please check our completed projects...:-) Kindly let us know more details about this project and we can complete it together...:-) Thank You

$2 777 USD w 30 dni

4,9

(9 opinii)

4,3

@ExpertProEng

Hi i can help you with extensive professional experience in Electronics (Digital, analogue & Embedded) design and development. I believe in quality work. Contact me and send me details. Feel free to ask me if you have any queries.

$2 500 USD w 30 dni

4,5

(2 opinii)

3,9

@yaroslavstetsyk

I have overall 5 years experience in embedded at commercial projects. Experience in electronics, board routing, circuit diagrams etc about 10 years. I worked with data encryption in security, communication protocols, low-power systems. As I understand - you need to have also PC application that will generate passwords/codes as well as embedded application (solar side) that can "recognize" password/code and decrease remain debt. One easier way it's encrypt predefined text or code (expl: solar-$20) with some key that know you and your solar system to decrypt it and make decision. But you also have to have an master - for example, remote server that know about all existed codes and can check entered code to avoid usage one code on multiple devices: one device can verify code but all other can't know about it. You can contact me any time via Skype slavik585s for any questions on discussion.

$1 500 USD w 30 dni

5,0

(1 opinia)

1,6

@alanantar

La propuesta todavía no ha sido proveída

$2 500 USD w 10 dni

0,0

(0 opinii)

0,0

@pramodnatu

I have worked in following areas for last 25 years • Pcb Artwork Layout: Mostly I do my pcb artwork layout in pads(Mentorgraphics). I am also familiar with Orcad ,Eagle,Altium. Right from my first job(back in 1984) I am doing my own artwork layout for my own designs.I started doing with inkpen and paper and upgraded myself to cad. • Electronic design: I have developed many T & M instruments .(Function generator, Linear power supply, Frequency counter, safety resistance meter. Etc) • In power electronics I have worked for almost 15 years. I have developed many SMPS up to 500W with PFC input. I have developed LED drivers from 1 W to 150 W using Power integration IC’s • I know C language though I am not expert on that but I can trouble shoot the programs and algorithms logically. • I have developed many product using Arduino

$2 500 USD w 30 dni

0,0

(0 opinii)

0,0

@ahmedmasud72

My company already sells a license key management library for exactly this purpose. We can generate unhackable keys that are time-limited or perpetual ... Contact me directly at 855 534 5434 x700 if you want more information.

$5 555 USD w 30 dni

0,0

(0 opinii)

0,0

@Attila19

Propunerea nu a fost încă furnizată

$2 777 USD w 30 dni

0,0

(0 opinii)

0,0

@hfar

你好可以有一个算法，将购买钱数转化成加密后的字符串编码，在系统内设置解码过程，解码后系统相当于冲值对应的金额，用完后太阳能系统将停止工作，直到从新冲值。如果需要我方开发，需要一个原产品样机（电路控制部分，源代码部分），芯片仿真工具（如不能提供我方可以代购）。联系方式：手机 18255175180

$1 666 USD w 30 dni

0,0

(0 opinii)

0,0

@adityashirodkar

I can do this project. We can use a GSM service in order to communicate with your solar home system. or we can also use internet connection for the same. If using internet connection, this is how it will work: I will connect a single board computer i.e. RaspberryPi, to your system. The user than connects the system to the internet in order to reuse it after the month period. He can use Wired or wireless internet. And this way the home solar system of yours directly communicates with your server. Looking forward to talk with you.

$2 000 USD w 20 dni

0,0

(0 opinii)

0,0

@desaidipakd

A proposal has not yet been provided

$2 833 USD w 30 dni

0,0

(0 opinii)

0,0

@shaha24

A proposal has not yet been provided

$1 666 USD w 7 dni

0,0

(0 opinii)

0,0

@bagdeparag

Overall 15 years of experience in Design and development of Embedded System Development. Expertise in Wireless/RF(ZigBee/802.15.4) based Product Design, Development & Testing, Coding. System Designing Expertise: Schematic design, PCB Lay-out, Assembly programming, C, C++ programming, HDL coding etc. Microprocessor/Micro controllers: 8051, PIC, AVR, ARM, MSP430, etc. Embedded OS: RTOS, VxWorks, RTLinux and others.

$2 500 USD w 60 dni