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Bluetooth low energy adapter

$750-1500 USD

Closed
Posted about 7 years ago

$750-1500 USD

Paid on delivery
I need help designing a small RS232 to Bluetooth low energy adapter. Features: RS232 Bluetooth Low energy SD CARD Module needs to read MODBUS RTU, same the registers to the SD Card and broadcast data over Bluetooth. This will be connected to RS232 Modbus RTU controller, which the Bluetooth adapter can draw power from up to 12 volts and 2.5 amps. Bluetooth needs to be compatible with mobile devices as well as windows and mac desktops. Thanks
Project ID: 13903482

About the project

19 proposals
Remote project
Active 7 yrs ago

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19 freelancers are bidding on average $1,404 USD for this job
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Hi Sir I am an expert electronics engineer with more than 8 years of experience in this field. Please have a look at my profile I have used the BLE before. Please get in touch to discuss it further Regards
$1,500 USD in 20 days
4.9 (149 reviews)
7.5
7.5
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hi i am an electrical engineer. i have vast experience related to circuit design and pcb design. i have done many embedded system projects. i have hardware experience pcb design. let me know if you are interested. we can discuss further on chat.
$2,000 USD in 20 days
4.9 (10 reviews)
5.7
5.7
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hi, i am an electrical engineer. i have expertise in embedded system design and Matlab.i can help you with this project. Kindly reply back and let us discuss project further. regards
$2,500 USD in 20 days
4.5 (26 reviews)
6.4
6.4
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Sure, professional engineer with 7 years of PCB design experience can help you .I have 38 years of eletronics design experience ............................................Prefer an offer at $11/hr rate or at equivalent rate in other currencies
$1,500 USD in 20 days
4.5 (78 reviews)
6.2
6.2
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I'm a PhD student in Engineering with a Master's in Statistics. Expert in Matlab, Minitab Econometric and statistical modeling of pretty much everything you can think of. These include expertise on protocol development, research study designs, sample size calculations, data management, and data analysis using various statistical software’s (i.e. STATA, Eviews, R & SPSS), statistical interpretation and report writing. Currently involved in official approval of internal econometric models that banks are using.
$1,764 USD in 20 days
4.9 (10 reviews)
5.3
5.3
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Hello! We are extremely interested in this project and would love to work on this project, please reply back to discuss further. Looking forward to hear from you soon. Thanks!
$1,764 USD in 30 days
4.6 (24 reviews)
5.2
5.2
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FREELANCER RECOMMENDED ------------------------------------------------------ Can help... I am an Expert... Lets Start! Please start a Discussion with me and we can get started from there... Please check the past projects I have handled and check my reviews for what employers have to say about my work... Can start right now...
$1,250 USD in 20 days
5.0 (5 reviews)
5.0
5.0
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I am an Electronics and Electrical Design Engineer with the areas of expertise in Embedded System, product prototyping, PCB design and layout and firmware development for systems. Experience: I have worked with different topologies for DC-DC, AC-DC, DC-AC converters. Completed a lot of projects based on MCU - ARM - STM32, AVR, ESP8266, PIC, ARDUINO. I have knowledge and working experience with interfaces - RS-485/232/422, Wi-Fi, Bluetooth, SPI, I2C etc. a lot of sensors, peripheral ICs. Software proficiency: • AUTOCAD • MATLAB • PROTEUS Design Suite • ARDUINO • ALTIUM Designer • KICAD • ESP8266 Gaining your trust is vital for me because I want to make friends on freelancer. I am available 24/7 and can start your project as soon as possible. If interested please contact me to talk in more detail about the project and define our milestones.
$1,250 USD in 20 days
5.0 (13 reviews)
4.2
4.2
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Hi, Can we discuss the project further? I have done similar project and understood the project outline. Please give me a chance. A trial will convince you. Looking forward to work with you.
$833 USD in 20 days
5.0 (3 reviews)
4.3
4.3
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Hello Dear I am an expert with more than 15 years in the field of embedded systems, electronics and prototype development. I have worked alot on SD card interfacing, implementing Fat File system on it, BLE using cc254x and nRF nordic. I assure you the best solution for your work invluding working samples. Regards Ch
$1,250 USD in 30 days
4.6 (11 reviews)
4.7
4.7
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system won't let me bid over this amount until I have reviews, but it's an interesting project. I have extensive experience with MODBUS to GPRS converters and have actually wanted to make a BLE variant. I'll do it for this price if I can recast it as a RS485 - BLE variant for other applications.
$1,222 USD in 20 days
5.0 (4 reviews)
4.0
4.0
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Hi, Can you please share your project requirements/task expected from us. About us: We have 10 years of experience in Product development. Micro-controllers we have worked on PIC, STM32, PSOC and AVR. Development kits and instruments available for testing purpose. For PCB designs we use KICAD. C#, LABVIEW, Python for GUI, Controlling or Datalogging purpose. Thanks and Regards, Santosh
$1,388 USD in 20 days
4.8 (3 reviews)
3.9
3.9
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Hi, I am an electrical engineer having an experience of four years in embedded industry. I have read your project description and i understand that you want to make a gateway for RTU Modbus data. In this case our device will become modbus master and from some other RS232 slave it will ask for the data and send to bluetooth with store in SD card with timestamp Filesystem. I am familiar with Modbus and Serial communication. I wrote my own Modbus library in C for 8 bit and 32 bit microcontroller. For 32 bit i am using STM32 microcontroller since last 4 years. For low power device we can use STM32L series also. Recently i am working on to convert wired keyboard into wireless using nRF51822 BLE chip. I am a proficient Embedded C programmer and PCB designer. Do let me know if you have any queries/questions. Let us at least get into the interview stage and discuss things. Hoping to hear from you, Jaydip Kathiriya
$1,138 USD in 16 days
4.4 (1 review)
2.8
2.8
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Hi my name is James and I am developer based in London. Your project caught my eye and I would love an opportunity to discuss it further with you. Feel free to ask for specific examples relating to your project and read my reviews on here. I look forward to hearing from you. Thanks, James
$1,250 USD in 20 days
0.0 (0 reviews)
0.0
0.0
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A proposal has not yet been provided
$1,333 USD in 90 days
0.0 (0 reviews)
0.0
0.0

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Member since May 2, 2017

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