In Progress

Electronics Hardware Design and Prototyping

I want a very simple electronic board. The main goal is to make the system consume very very low power.

It will work with Li-Ion batteries.

The system should accept configuration with SMS.

Ex Message

1234567890/1234567890 (10 char password) If first part before "/" is difrent from the second part and first part is correct it should change the password to second part. If there is no second part no need to check. Also I need a fixed Admin password. If admin password received no need to check oters.

120 (2 hours) (Max Interval 43200 minutes (30 Days)

[url removed, login to view]

If conf is OK it should send a sms to the related number "IMEI:XXXX CONF OK"

After conf OK delete the SMS

The system should also accept configuration via website.

if there is answer other then "OK" after uploading data, it should parse as SMS configuration.

I will supply the website. No need for programming on PC

There should be protection on ADC side with a varistor or GDT and a resetable fuse (changable) to protect the ADC.

The system should consume very very low power to make it possible to run for years with a single battery.

On GPRS side you can use simcom, telit or siemens modules. You should inform me and let me check with the authority.

There should be 3 modes selectable with an extarnal switch. Normal mode is normal mode, programming mode will prevent it t go in to sleep mode. And let us send conf via SMS and debug mode will wait a missed call and send conf information back to the requesting number.

Also there should be an external power switch.

On normal mode when it gets a missed call it should send all the parameters to the requesting number via SMS

You should use Industrial grade components. The system should be able to run between -30C up to 80C

no need for connectivity with PC no need usb serial etc.

There should be leds indication for , Power Status, GPRS status. Comm status. in wake up mode ( no need in sleep mode)

Basicly the system should read an RMS analog value from ADC (0-5V) at least 12 bit. (This value should be identicale to a multimeter)

Run GPRS modem, connect to internet, call the predefined website with parameters, after receives OK it will go back to sleep mode.

Thats all

I want everything. Design Files, drawings, source code etc and at leat 3 working prototypes with out GPRS modules.

Since importing devices with IMEI numbers are very dificult in my country I dont want the modules. I will supply and solder required module locally.

Skills: Electronics, Product Design

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About the Employer:
( 0 reviews ) IZMIR, Turkey

Project ID: #2566226

Awarded to:


I am an experiened embedded system designer. Plz see your PMB

$550 USD in 15 days
(5 Reviews)

18 freelancers are bidding on average $1867 for this job


Hello I can do it. See my PMB for details

$2650 USD in 30 days
(26 Reviews)

Hi I am an Electronic Engineer and interested in doing the job. Thanks

$2600 USD in 36 days
(6 Reviews)

hi, i can help.

$3000 USD in 60 days
(20 Reviews)

Hello, Electronic engineer with over 15yr experience available. Please check PMB

$2900 USD in 35 days
(3 Reviews)

Hi, do you need a proffesional help?

$2000 USD in 20 days
(9 Reviews)

Read Pm sir :)

$750 USD in 30 days
(2 Reviews)

I have a ready and tested system with all design/source files

$2000 USD in 30 days
(0 Reviews)

Hello, I've already designed devices with GPRS modules and SMS send/decode. Check my PM. Regards

$5000 USD in 60 days
(0 Reviews)

Hello. I can make this project, I have some finished project at the GSM/GPRS-telecommunication and I don't see any difficulties for that.

$1600 USD in 30 days
(0 Reviews)

I can do it.

$1500 USD in 30 days
(0 Reviews)

We understand your requirement, can show you the piece wise execution on YouTube. can we work it out

$1200 USD in 10 days
(0 Reviews)

Hi, We can help you with the requirements. Regards, Cedesyn Technologies

$1000 USD in 15 days
(0 Reviews)

Hi Sir, I offer a professional and experienced team for this job. Me and my collegues engineers have already realized a fully working GPRS embedded device for data acquisition and forwarding. Hope you will consider my More

$950 USD in 30 days
(0 Reviews)

Hi, please see PMB...

$750 USD in 30 days
(0 Reviews)

Large experience in similar projects.

$1900 USD in 45 days
(0 Reviews)

Hi, I can do this project based on SIM900. Please, check private message for example projects.

$2500 USD in 45 days
(0 Reviews)

I want and can develop this project.

$750 USD in 90 days
(0 Reviews)