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Bluetooth product development

$750-1500 USD

Completed
Posted over 9 years ago

$750-1500 USD

Paid on delivery
We have a project where we're going to take an existing board that reports pH and we want to add temperature and humidity to transmit wirelessly over Bluetooth , the Schematic attached is for the PH board , ( PH sensor not shown ) I will need board mounted Pins to plug the PH dish sensor into. Drain Source and Gate as shown, I need you to redesign this PCB to add the Temp RH Chip ( Data sheet attached) and to add a small Lithium Ion battery to power PH board and wireless, with a charging port for either recharging from wall power or ongoing trickle charge via small solar Cell. The object is to make this in small foot print I would like to find someone to help me develop this product this product development is on the fast track so if you are crunched for time please do not apply. If you are more comfortable by the hour I will consider provide you can give me some time line of development and estimated hours not to exceed... It would be very helpful if you had the skills to also help develop the App that will receive the data and send it to a Web based cloud interface, the Web based interface we already have in place we already have in place...
Project ID: 6319790

About the project

33 proposals
Remote project
Active 10 yrs ago

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Hello, I am [login to view URL] sekhar,[login to view URL],[Phd].we have 10+ years experience in this field.i can assure u support and service even after completion of [login to view URL] have inhouse PCB design and [login to view URL] the provided information is not enough, the bid is just an approach to initiate [login to view URL] contact me in online we can discuss the details, then we can finalize the bid and delivery [login to view URL] u. sir, what is the working voltage of previous Ph meter.? regarding this, i would like to use CC2541 for buletooth [login to view URL] can discuss the remaining details on chat,then we can finalise the bid & delivery [login to view URL] u
$2,105 USD in 30 days
5.0 (47 reviews)
7.7
7.7
33 freelancers are bidding on average $1,512 USD for this job
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Dear Sir, I am an experienced PCB designer who has over 14 years design experience on complex PCB design. I can provide you with design service from schematic entry to PCB layout. I can support your PCB fabrication also. Most of my designs are ARM-Based Platform and FPGA boards, ucontroller/RF Boards. Good working records can be found in my feedbacks. I also have experience on BLE relatedr device design and PH Sensor amplifier circuit design. They have been used for smart watering system. I am using Altium Desinger 14. Normally, Project deliverables would be, ---Schematics and PCB layout files ---Engineering docs such as gerber ---Other documents upon your request. Please message me if you are interested or want to learn more. Thanks
$1,300 USD in 20 days
4.8 (112 reviews)
8.0
8.0
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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
$2,500 USD in 15 days
4.8 (77 reviews)
7.8
7.8
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Hi! Our team can do this work. We are specialists in the field of industrial electronics, digital and analog circuit design, microcontrollers. Please contact us if you are interested. Best regards, Aleksandr.
$1,394 USD in 45 days
4.9 (33 reviews)
7.2
7.2
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Hi, I have a huge experience with similar applications+ have designed ~10 boards with BT interface. Preliminary timeline: T0 - start of the project T0 + 3 days - High level block diagram ready for approval T0 + 8 days - Schematic finished T0 + 11 days - PCB ready for review and approval T0 + 15 days - PCB finished T0 + 20 days - firmware for testing finished Deliverables on T0+20 days: - complete design (sch + pcb) - complete production pack (gerber files, BOM, pick and place) - firmware for device testing Please let me know if you are interested in cooperation. Regards, Michal
$1,500 USD in 20 days
4.9 (31 reviews)
6.3
6.3
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Hi i can help you , working with Bluetooth for many years , see portfolio for same design with Bluetooth , have modules with you can used same a kits for test soffware in fast time. next i can design special board for you. Best Regards. Miky.
$833 USD in 3 days
4.9 (53 reviews)
6.4
6.4
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Its an interesting job indeed and can handle all the requisites. From designing the schematic to PCB layout, firmware development, desktop application (windows only) to export the received data to any database. I have more than 25 years of experience in electronics, over 18 years in C programming and over 6 years in PCB designing in EAGLE (Provided schematic is designed in EAGLE too). I have just placed the estimated completion time on a rough note because in case if anything needs more time than what we presume then it still be under the timeline. Will definitely do it earlier than mentioned time frame and meanwhile you create the re-designed prototype, I will work on the software side. How far does it communicate with the host ? Because there are cheaper solution available than Bluetooth and as I dont have enough information about the range that is desired in this product, I cant share my views. PC side will receive the data and upload to the server. Uploading can be done easily via a php page interfacing with the desktop application. Thanks for your time and I am looking forward to hear from you soon. Best Regards... Roy
$1,500 USD in 35 days
5.0 (38 reviews)
5.8
5.8
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Hi, I am an Electrical Engineer practicing for last 6 years in an R&D Organization. I have designed a number of products ranging from RF & Microwave circuits to digital circuits. i have experience in designing filters, couplers, LNAs, Amplifiers, antennas, sweep generators, function generators, VCOs, NCO and many more in the frequency range of DC to 2 GHz. i use ADS, HFSS, OrCAD, Eagle PCB for the design and development of the above mentioned products. I have designed circuits for Filters, Couplers, LNA, Amplifiers, Antennas, Bluetooth, Wifi, Sweep Generators, Function Generators, VCOs, NCOs, DDS, 555 timers, AM Modulators, Microcontrollers, EEPROM, Flash, Accelerometers, Bluetooth, USB, RTC, Strain Guages, Opto-couplers etc. My area of expertise include also PCB Schematic and Layout Design, Antenna Design, PCB Prototyping and testing, Programming using LabWindows, LabVIEW and MATLAB, etc. Looking forward to discuss with you in detail. Regards
$1,500 USD in 30 days
4.8 (31 reviews)
5.9
5.9
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A proposal has not yet been provided
$2,000 USD in 20 days
4.7 (22 reviews)
4.6
4.6
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i am an embedded programmer with 4 years of experience. I can redesign the board, write the required firmware and I can provide you with the software support on the webserver, PC and smartphone based apps. please contact me to discuss details
$1,000 USD in 20 days
5.0 (7 reviews)
4.3
4.3
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hi... i can design your project in Altium Designer.. i ll provide to you schematics, PCB, BOM and gerber files and what you need im interesting your project, pls give me more details.. thanks..
$1,112 USD in 3 days
4.7 (10 reviews)
3.6
3.6
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I have very good experience in these fields and would be able to design the board you ask within three days. I can't build app for it but I think my lowest possible bid should allow you to find someone who can do it. I will use Atmega micro controllers ( 8-bit 32kb flash). I also have good PCB layout skills and can design you the circuit with two-sided PCB that should ensure the small size. So I will send the data through bluetooth using atmega MCs. If you are willing to put your trust into me, I will show you that you did the right thing.
$750 USD in 6 days
5.0 (1 review)
2.1
2.1
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Hello employer. Thanks for kind explanation on your project for me to understand sufficiently. I'll support you in designing pH , temperature and humidity signal processing circuit and firmware. These topics were already covered by me and successfully implemented and sols a great deal to customers. It was completed version. So i confidently promise that i'll successfully complete your job and help you greatly. Please have a contact with me and collaborate with me. Thanks again. Waiting for favorable reply from you. With best wishes. Sincerely .
$1,055 USD in 15 days
4.6 (1 review)
2.4
2.4
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Hi there! My name is Keith and I am a professional electrical engineer here in the US. I now work solely as a contracting designer and freelancer. I am knowledgable in all sorts of microcontroller implementations, circuit design, embedded systems, mechanical systems, and more. I always enjoy the opportunity to work on such a variety of interesting projects here on Freelancer and invite you to have a look at my resume and portfolio. I am hardworking and understand that when all is said and done, my clients need something that works well and done direct to your specifications. Please don't hesitate to contact me with any questions before choosing a bidder. Thank you for considering! - Keith B.
$1,578 USD in 21 days
1.7 (5 reviews)
5.1
5.1
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Hi! I have large experience in circuit/board routing, embedded software and probably I can help you with app that read/sends data to cloud because I'm currently involved to similar project.
$750 USD in 5 days
5.0 (1 review)
1.6
1.6
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A proposal has not yet been provided
$1,250 USD in 20 days
0.0 (0 reviews)
0.0
0.0
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yes sir i have already worked a project like this my project show temperature and umidity in LCD and in computer, so i will be injoy work with youu
$1,250 USD in 19 days
0.0 (0 reviews)
0.0
0.0
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Hi, The time/price include adding the sensor to the PCB and also the requested Lion battery in to the PCB. The connection to your other board will have additional I2C bus to support your new sensor. Break down time schedule: 1 day review project documents and datasheets. 1~2 days Schematic design 2 days for PCB design. Extra options: In my opinion it is more professional to add microprocessor and the other related thing to this board to support USB CDC or Bluetooth but it increase the size of the PCB and also needs more time time to design PCB. (I will manage them for your project) Again if you need firmware development again you can count on me. if you are interested, keep in touch to discuss about more detail.
$1,666 USD in 4 days
0.0 (0 reviews)
0.0
0.0
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I have been working with BLE systems for the last 2 years and can quickly come up with a schematic that should meet your needs. For the BLE SOC the TI CC2540/1 would work the output of the PH circuit can be fed into the built in ADC and the for temperature and humidity the I2C bus can be used. The only problem I can see with this in terms of size is providing a 9V supply for the PH circuit supply, what are your requirements in terms of battery size (physical) and battery life? I have circuits already for the BLE portion of the design adding the PH and Temperature/Humidity is a relatively easy step. I would suggest the following milestones to complete this project: 1. Agree on specifications, most are obvious however battery size and life need further definition (1 day). 2. Schematic Design (1 day). 3. Foot print design and layout 2 layer (2 days) I have quoted for upto this stage. 4. Firmware development (I have done some of this before but would need some time and eventually a test platform of some kind so lets say 4 days). Any questions send me an email Richard
$1,250 USD in 10 days
0.0 (0 reviews)
0.0
0.0
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Hi, We would like to work with you. The following is our brief introduction. If you have any questions, please give us your contact information and we will reply you asap. Our timeline of development is as follows. 1. 1 - 2 days to finalize the schematic 2. 2 - 3 days to finalize the layout 3. 3 - 10 days to fabrication and pcba depends on your budget and urgent request 4. 5 - 20 days to do a firmware programming as well as connected to cloud interface if needed A team of professionals in Hong Kong with more than 10 years of experience in embedded systems. We are focused on providing full-cycle product development, hardware development as well as software development. Therefore, we can work on prototype project or pcb assembly or product manufacturing. Service including: Circuit design, PCB layout, PCBA assembly, Prototyping, Engineering Sample, Firmware and software development, System design Our past project: BLE Device, 13.56Mhz RFID reader, USB RFID reader, Digital Media Player (DMR), Portable device Skill / Kit: 8-bit,16-bit, 32-bit MCU Bluetooth BLE, Wifi, RAM, Flash, sdram, ddr, I2c, SPI, RS485, LCD, Ethernet, ....
$2,222 USD in 10 days
0.0 (0 reviews)
0.0
0.0
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Hello, The basic design you have outlined would keep the conditioning op amps for the PH and add a micro controller to read the temperature and RH sensor (I2C interface only). The readings would have to be encoded into a message format (do you have defined message format?) and transmitted via the Bluetooth to a mobile (android or apple)or a win application. I see that PH is indicated by the red/green LEDs and is also output as a voltage. What is the sensitivity range of your dish sensors and do you know the corresponding voltage ranges? I am a product designer electrical engineer, specializing in embedded hardware (schematic capture, PCB design, PCB prototype assembly) and firmware design (code development) and development. My profile provides some examples of the projects I have accomplished (including a web based temperature and barometric web based sensor board). I also have resources to development mechanical components such as plastic housing. I am based in the US (Chicago) so time zone differences, shipping of prototype materials (US customs) or language barriers should not be problem. Please take a moment to review my freelancer profile projects and I am also on LinkedIn with my work history. If afterwards, you think I might be of service in your project, feel free to contact me at 630.696.7460.
$1,666 USD in 20 days
0.0 (0 reviews)
0.0
0.0

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Flag of UNITED STATES
Eastcost, United States
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Member since Oct 7, 2012

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