The Best Bluetooth Freelancers For Hire In China

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$55 hourly
- 4.4/5
- (44 jobs)
⭐Innovation meets Ingenuity in Electronics Engineering With nearly two decades of experience in electronics engineering, I specialize in delivering solutions that blend innovation and ingenuity. My expertise covers circuit design, analog/digital electronics, embedded systems, signal processing, manufacturing, and sourcing across diverse domains like IoT and telecommunications. ⭐ Please note: I can best assist you if you can provide clear and specific work requirements and scope. ⭐⭐⭐⭐⭐About Me⭐⭐⭐⭐⭐ Over 20 years in electronics design, manufacturing, and Supply Chain Management (SCM) 13 years with Fortune 500 companies Flextronics and Huawei Cross-functional team experience in the Middle East and North Africa (3 years) Founder, PCBLOOP Technology, an engineering service company with 150 employees Lead a team of 24 engineers and technicians ⭐⭐⭐⭐⭐Services I Offer⭐⭐⭐⭐⭐ (PS:-Company URL: pcbloop.com) • Electronics product prototype development, manufacturing, and consultancy • Detailed preliminary research report for your product idea and concept • Architecture design and technology stack selection • Hardware platform and key components selection • Prototype development based on preliminary research • Commercial electronics product development offering end-to-end services including: ⚡⚡⚡R & D ⚡⚡⚡ - Architecture design - Hardware circuit design - PCB design - Firmware development - Software design - Device backend development - Web or apps development - EMI/EMC simulation - Thermal simulation - Mechanical design - Industrial design - Mold design - Deployment of backend/frontend on server - Prototype hardware and software debug/testing - Design for manufacturing/testing/assembly review ⚡⚡⚡Production⚡⚡⚡ - Product prototyping - PCB fabrication - PCB assembly - 3D printing - Plastic mold injection - Component & parts sourcing and purchasing - Turnkey/non-turnkey project contract manufacturing - Mass production/lean engineering services ⭐⭐⭐⭐⭐Technology Related⭐⭐⭐⭐⭐ • Development boards(SBCs) [Raspberry Pi, Intel Joule, OrangePi, Nvidia Jetson, Rockchip, etc.] • Microcontrollers [Arduino family, ATMega, Atmel, ARM, ESP8266, ESP32, STM32, etc.] • Hardware protocols [RFID,NFC,ZigBee,NB-Lot,USB, HDMI, Ethernet, Wi-Fi, BLE, PCIe, VGA, RS-232, I2C, SPI, UART, etc.] • Software protocols [GSM,CDMA,WCDMA,LTE, TCP/IP,SNMP, MQTT, UDP, RTP, RTSP, NFS, etc.] • OS [Windows, Linux systems, OS embedded Linux, Android, iOS, FreeRTOS, FreeBSD, etc.] • Programming languages and scripting [Python, C/C++, Javascript, BASH, etc.] • Web technologies [ReactJS, AngularJS, Node-RED,etc.] • Deployment and versioning control suites [CVS GitLab, Git, GitHub,etc.] • IoT platforms [Self-hosted platforms, AWS IoT, Azure IoT,etc.] • IAE platforms[Siemens SIMATIC, Omron Sysmac,etc] ⭐⭐⭐⭐⭐Category of the Product⭐⭐⭐⭐⭐ • Consumer and smart IoT electronics: [Wearable smart devices, smart home devices, industrial IoT devices, smart health devices, smart pet products, charger and power devices] • Industrial automation equipment: [Controlling and monitoring (water, electricity, gas, temperature, humidity, pressure), motors and drive, industrial networks, measurement instruments] • Automotive industry: [In-car entertainment systems, in-car navigation, automotive lighting] • Internet and Telecom:[Mobile phone, Internet and Satellite Communications] ⭐⭐⭐⭐⭐Client Testimonials⭐⭐⭐⭐⭐ "Xiaolin’s team is very professional and hardworking... always satisfied with the jobs they delivered." - Allen Geli, CEO of Taotol "Frankie is an excellent engineer and supervisor... expecting my next opportunity to work with Frankie." - Andrew Ruess, Huawei Hardware R&D manager "Xiaolin is the best guy in the hardware engineering area... thank him for his outstanding support." - Mike Durkan, Engineering Director of Cisco Tags: Electrical Engineering, Electronics Engineer, 3D modeling,ID,Firmware, PCB layout, Schematics, Altium Designer, IoT, Power Electronics, Bluetooth, BLE, RF, TI,FPGA, SoC, VHDL, Verilog, Xilinx, Altera, C, C++, MCU, RTOS, prototype, validation, Enclosures, BMS, SolidWorks, Android, iOS, Java, Apps, Database, AWS, Python, ESP32, Arduino, PIC, NXP, STM32, LCD, Raspberry Pi, Wi-Fi, Prototyping, WAN, Assembly, Motor Driver, JLC.

Bluetooth
Multilayer PCB
Circuit Design
RF Design
Lean Manufacturing
Hardware Design
Firmware Programming
Altium Designer
Electrical Engineering
PCB Design
Sourcing
Electronic Design
WiFi
Embedded System
Prototyping
$30 hourly
- 3.3/5
- (35 jobs)
1. My powerful skill : FPGA and DSP - Intel's FPGA, Xilinx's FPGA, Lattice's FPGA - TI' DSP, Analog' DSP. - ESP32, STM32, ATMEGA, Raspberry Pi, nRF52, dsPIC 2. Production - Component Source, Mass production 3. CAD/CAM - Altium, EasyEDA, Matlab, Multisim,, Eagle, Solidworks - VHDL/Verilog-HDL, C/C++, Assembly, Python - Digital/Analog circuit design - Signal processing, Image processing - USB2.0/3.0, PCIe, CAN, Modbus, UART, I2C

Bluetooth
Electronics
PCB Design
Mobile App Development
FPGA
Wireless Communication
Embedded System
Raspberry Pi Firmware
Digital Signal Processing
Machine Learning
Altium Designer
Analog Circuit
ESP32
Power Electronics
$38 hourly
- 5.0/5
- (56 jobs)
✅ 13 Years Professional Experience ✅ 40+ Mobile Apps ✅ Top Rated Plus Developer Hey there! 👋 I'm Sherwin, an expert Engineer with 13+ years of experience at big tech companies. I'm experienced leading, designing and implementing core mobile features in fast-paced, technology-driven environments with worldwide impact and multiple stakeholders. I am fluent in English and have experience working with scalable and testable code, REST APIs, multiple design patterns, CI/CD pipelines and version control. 🏆 Worked in the multinational company MicroStrategy, Developed apps with over 100 million daily users such as DiDi and Kuaishou. 🚀 Expertise in Technologies: o Native Development: Swift, SwiftUI, Objective-C, Kotlin, Java, Jetpack Compose, HarmonyOS o Cross-Platform Frameworks: React Native , Flutter o DataBase: Realm, CoreData, Firebase FireStore, Firebase Realtime Database, Supabase, RoomDatabase o Web: Flutter Web o Deploy: AWS S3, Lamda, CloudFront, EC2, OpenShot o Server Development: Python ✅ My experience domains: o Bluetooth / Smart Watch / Camera Domain o Fitness / Health Domain o OpenAI / Assistance / Whisper o Location Tracking / Travel o Social Media/Dating Domain/Video/Audio chats o Video/Audio player processing application o Financial / Shopping Domain o Payment / In App Purchase / Apple Pay / Stripe o Connection between clients and hardware suppliers in China I'm excited to bring my experience and skills to new projects and deliver high-quality work on time and within budget. Let's make great apps together! Regards, Shaolin

Bluetooth
iOS SDK
Supabase
Firebase
Native App Development
Smartwatch
Flutter
Java
iOS
Android
React Native
Objective-C
Swift
Kotlin
Mobile App Development
$40 hourly
- 4.7/5
- (20 jobs)
I’m an Electrical engineer having more than 12 years experience in Hardware development. I am from Shenzhen and developed many hardware . I am providing PCB design Services : Schematic Capture, BOM optimization, PCB layout. I can process the orders in PCBway, JLCPCB or local Company to make a samples or mass production. I have good experience in the follows fields ------- Hardware Development ------------- - Bluetooth, Wifi, Ethernet, CAN, RS-232/485/422, SPI, I2C, Uart, nRF5283x, nRF82840, CC264x, CC265x, ESP32, - Sensors : Temperature, Humidity, Motion Sensor, MEMS/IMU, Pressor sensor. etc. - GPS/GNSS Tracker device. - ARM - Based Controller : STM32F1xx, STM32F2xx, STM32F4xx. STM32L1xx, STM32L4xx , TI, Microchip, Atmel, PIC etc. - Raspberry PI, CM4, Orange Pi, Beagle Bone. - FPGA + DSP PCB design. Xilinx(Artix-7, Spartan, Vertex), Altera. - VESC, Motor Control PCB, - 2~8 Layers PCB. PCB design softrware - Altium desinger - Kicad 7 - EasyEDA - Eagle - Diptrace

Bluetooth
ESP32
Arduino
Printed Circuit Board
KiCad
PCB Design
WiFi
Hardware Prototyping
Altium Designer
Hardware Design
EasyEDA
Sourcing
Circuit Design
Multilayer PCB
Electrical Engineering
$49 hourly
- 4.2/5
- (86 jobs)
For the past 20 years, I have been engaged in the design and production of electronic devices, including wireless devices. During this period, I started with antenna design, designing and producing FMCW radar in each frequency band (including millimeter waves), and continued until the signal processing unit section. In addition, a wireless direction finding system with high measurement accuracy was developed based on phase interference correlation processing method, and a coordinate measurement system combining TDOA and GPSDO was developed. The operating frequency bands of these two systems are between 20 MHz and 6 GHz. In addition, he also developed a radar frequency band signal analysis and directional analysis system based on IFM and BM methods. The frequency range of this system is 2 to 18 GHz. Moreover, while developing wireless navigation devices that can perform GPS RTK and Heading, a precision inertial navigation system has also been completed. This heading is based on a GPS system and is not affected by surrounding algae. Moreover, with the advancement of high-speed PCB design for RF systems, high-speed signal processing circuits above 1GHz and various Android, Linux devices, etc. have been widely introduced into a field. The programs used in these processes include: - RF simulation and design program: CST Studio, ADS - PCB design program: Altium Designer. - Mechanical design program: Solidworks. - Signal processing programs: ISE, Quartus, Keil, MPLAB X, Arduino. Matlab, And developed intelligent lock with facial recognition and fingerprint recognition functions, and has sufficient experience in mass production, establishing a monthly production process of more than 10000. In this process, a procurement process for various elements, including RF elements, and a production and testing process for components have been established. Regardless of the type of product or the quantity, there is rich experience in overseas direct delivery. And, I can process various sourcing and delivery of various electronic components.

Bluetooth
RADAR Construction Management RADAR
Antenna Design
RF Microwave Design
Medical Device
Power Electronics
Embedded System
Altium Designer
Electronic Circuit Design
Wireless Communication
ESP32
WiFi
Multilayer PCB
3D Design
$30 hourly
- 4.6/5
- (12 jobs)
Equipped to build, program, and test prototypes in-house & PCB manufacurer. I have served a wide variety of industries and have developed initial concepts and prototype devices as well as producing products that go into full scale production manufacturing. I have Extensive design experience in PCB design field, including detailed layout incorporating 3D CAD models. At present, I am working as Engineering Team leader at China PCB/PCBA/EMS/OEM/ODM Company(POE). Whether it's taking an existing Arduino / Raspberry Pi prototype and turning it into a manufacturable product, or developing a brand new product from the early concept stage, I enjoy providing you with technical solutions that are suitably engineered for your needs. Key offerings: • System analysis and design, including key technical and market considerations for success • Electronics design and printed circuit board (PCB) layout with Altium Designer, EasyEDA, Eagle • Mechanical CAD work to supplement the electronics, including sheet metal work • Develop bare-metal firmware and embedded-OS software • Build and test prototypes • Manage regulatory testing • Manage product manufacturing and logistics • Troubleshoot and fix failed devices and bad designs. I can use many formats of customer-supplied data from other electronics design software, and mechanical data from Solidworks and other standard CAD data formats. I have developed a wide variety of circuit boards, including: • Industry standard 4- and 2-layer boards with surface mount and through-hole components • Higher-complexity board up to 14 layers • High-speed / high-density boards with length-matching and tuning • Circuit boards with complex mechanical dimensional requirements • Flex- and rigid-flex circuits with features on multiple work planes. • Products incorporating Bluetooth, BLE, WiFi, and serial interfaces (SPI, I2C, LIN, RS-232, RS-485) Your project success is my happiness. I would not disappoint you if you select my service.

Bluetooth
Hardware Design
Altium Designer
Firmware Programming
Multilayer PCB
PCB Design
Electronic Circuit Design
Manufacturing
Electronic Design
PIC
Raspberry Pi
STM32
ESP32
Prototyping
Arduino
$40 hourly
- 3.4/5
- (40 jobs)
I am an electrical engineer and PCB designer with a bachelor's degree in electrical engineering and over 10 years of experience in designing, developing, fabricating, and assembling PCBs for various applications. .. I have worked on projects involving Bluetooth audio, LED lighting, touch panels, LCDs, ESP32, and other system components. I am proficient in using various software packages and tools for PCB design, simulation, testing, and modeling, such as Altium, Cadence, PADS Mentor Graphics, DxDesigner, RapidHarness, Solidworks, HSpice, and HFSS. I have also experience in layout of 6-12 layer boards utilizing HDI technology and designing PCBs for medium to high-volume manufacturing. I am passionate about creating innovative and reliable solutions that meet the needs and expectations of my clients. I always commit to delivering high-quality work on time and within budget. Skills and Expertise • PCB design, development, fabrication, and assembly using various software packages and tools, such as Altium, Cadence, PADS Mentor Graphics, DxDesigner, RapidHarness, Solidworks, HSpice, and HFSS. • Signal integrity testing and simulation for PCBs using Altium, Cadence, PADS Mentor Graphics, and other tools. • Experience working with Bluetooth audio transmitter, audio wet and dry, audio amplifier, LED PWM, firmware, LED strip, and other audio and lighting applications. • Experience working with RS232, RS485, I2C, I2S, SPI, OBD2, PCIE and CAN bus protocols, as I have used them to access and analyze data from various vehicles and devices. • Experience working with various system components such as LCDs, touch panels, sensors, actuators, displays, power supplies, and analog circuits. • Layout of 6-12 layer boards utilizing HDI technology (stack-ups, blind/buried via structures). • Testing power and load capacity and resolving related issues for PCBs. • Maintaining and creating libraries for PCB components and symbols. • Designing PCBs for medium to high-volume manufacturing with an excellent knowledge of manufacturing, quality engineering, and reliability engineering with JLCPCB. • Proficient in VHDL and Verilog, with expertise in FPGA development tools, digital circuit design, synthesis, timing analysis, and real-time processing for applications such as telecommunications and embedded systems. • MS Office suite, BOM, and configuration management skills in mass production. Portfolio Here are some of the PCB design and development projects that I have worked on: • A Bluetooth audio transmitter that uses an ESP32 module, an audio codec, and a Bluetooth module to transmit audio signals from any device to a Bluetooth speaker or headset. I designed the PCB for the transmitter and programmed the firmware for the ESP32 module using Arduino IDE. You can find more details and pictures of this project in my portfolio [here]. • A LED lighting system that uses an Arduino Nano, a LED strip, a potentiometer, and a button to control the brightness, color, and mode of the LED strip. I designed the PCB for the system and integrated it with a 3D-printed case and a power supply. I also programmed the Arduino Nano using C++ and the FastLED library. You can find more details and pictures of this project in my portfolio [here]. • A touch panel controller that uses an STM32 microcontroller, a capacitive touch sensor, and an LCD display to control and monitor various devices and parameters in a smart home system. I designed the PCB for the controller and programmed the firmware for the STM32 microcontroller using C++ and the STM32CubeIDE. You can find more details and pictures of this project in my portfolio [here]. Availability and Rate I am available for a full-time position and can start working immediately. I can work 40 hours per week. My hourly rate is $40, but I am flexible and willing to negotiate. Thank you for your consideration and I hope to hear from you soon.

Bluetooth
Reverse Engineering
FPGA
Power Management
ESP32
USB Electronics
STM32
OrCAD
EasyEDA
Embedded System
Electrical Engineering
Altium Designer
Internet of Things
Multilayer PCB
Firmware Programming
$10 hourly
- 5.0/5
- (6 jobs)
I'm an embedded system developer with 4-years' of experience. I would try my best to help you with your project. I can design both the hardware and software of your system and meet your requirements with the highest standard. I am experienced in C/C++, Python, HTML, and Linux. I have been using ARM MCUs for a few years and I know them well. I can also do IoT projects.

Bluetooth
FreeRTOS
Linux
Altium Designer
ARM Cortex-M
Firmware Programming
STM32
Arduino
Python
C++
C
Firmware
Embedded System
$20 hourly
- 5.0/5
- (6 jobs)
I am an Automation system design engineer, Hardware designer, Firmware developer and have the extensive experiences even over 15 years. I'm especially interested in home automation or making intelligent new products or acquire and application new technologies. I work with the target of design to low cost, low power, high performance, the miniaturization of device by a compact layout. I design carefully to achieve the best performance in all projects, I find joy and pride in the successful results of projects. The areas I've experienced a lot are as follows. ● STM32F103RCT6TR, STM32F407VGT6, STM32F429ZIT6, STM32L476RGT6, STM32H743ZIT6, etc. ● ESP32-WROOM-32D, ESP32-WROVER-E, ESP8266, etc. ● nRF51822, nRF52810, nRF52832, nRF52833, nRF52840, nRF52843, etc. ● RAK811, RAK831, RAK3172, RAK4200, etc. ● SIM7000G, SIM7070G, SIM7600E, SIM7600G, etc. ● Arduino Mega2560, Arduino Mega328P, etc. ● SRAM, DDR, DDR2, DDR3, LPDDR3, DDR4, DDR5, LPDDR4, etc. ● MEMS Sensors (3-axis, 6-axis, 9-axis), ECG, PPG, HRM, SPO2, CO, CO2, Humidity and Temperature, Touch, Pressure, PIR, etc. ● PCIe, SATA, Ethernet, HDMI, VGA, LVDS, USB, UART, USART, CAN, SPI, I2C, I2S, RS232C, RS485/RS422, etc. ● BLE, IoT, AWS, GPS, GSM, Bluetooth, Wi-Fi, Z-Wave, Zigbee, LoRa, NFC, RFID, LTE, etc.

Bluetooth
Prototype
Home Automation
Sensor
AWS IoT Device Management
Circuit Design
Firmware Programming
Arduino
LoRa
WiFi
nRF52
ESP32
STM32
PCB Design
Hardware Design
$25 hourly
- 4.4/5
- (159 jobs)
I am a senior embedded system engineer and have a good experience in pcb design and firmware programming for prototype. Electrical circuit design and pcb design using the Altium Designer, Kicad, EasyEDA, Eagle and Orcad. For Firmware I have deeply knowledge about several family microcontroller such as PIC, STM32(STM32F0, F1, F4, F7, L0, L1, L4), ATMEL, TMS320C, ESP32 CC26XX and nRF51822 (nRF52832, nRF52840) , CC2640 for Bluetooth.. and then I can use several programming tools such as CCS & IAR, MPLAB & MikroC, Keil, and so on. Also i have worked with Verilog/vhdl for 5 years and used Quartus to develop EP1C12Qxx and EP3C.. + DSP... and Xilinx, Raspbery Pi programming I am developing electronic devices for over 9 years. Design a wiring diagram, develop printed circuit boards, printed circuit board layouts are made, I produce an assembly board, write the program for the device and debug programs, and printed circuit board. I have extensive experience in developing various sensors. GPS/GSM, Temperature, Motion Sensors. While job processing, I will always take care of each and every detail and try to come up with the best solution for your business success and be ready to communicate anytime you want. Best Regards

Bluetooth
Electronic Circuit Design
Circuit Design
EasyEDA
Electrical Layout Design
GPS
Multilayer PCB
Electronic Keyboard
Eagle
Arduino
PCB Design
KiCad
Altium Designer
Electrical Engineering
Firmware
$30 hourly
- 4.5/5
- (7 jobs)
I am an Electronic Engineer, with experience in different fields mostly releated with technology product development. My expertise area: electronic design, software development, microcontrollers, design and construction of PCB boards, cloud solutions to connect the devices using Web and Mobile APPs, final design of products for manufacturing. My focus is using technology to help you to achieve your goals, maintain a close relationship, connecting with you and empowering together.

Bluetooth
Drone
Internet of Things
Machine Learning
Linux
Video Stream
Raspberry Pi
Arduino Firmware
MongoDB
Android App Development
Microcontroller Programming
LoRa
Node.js
PHP
C
$52 hourly
- 0.0/5
- (0 jobs)
Over 20 years of software development experience, Familiar with embedded system software development, MCU firmware development, Familiar with Windows, Android, macOS/iOS system platform software development, Familiar with c, c++, c#, java, Kotlin, object-c, Swift, python, audio, usb, bluetooth, wifi, camera, iot, etc. Currently, as a partner of the company, I am responsible for developing and providing electronic product solutions for clients, including software, and hardware boards with firmware. Thank you for viewing my resume Telephone: +8613530748177 Email: jerry201716888@gmail.com WhatsApp/Telegram/WeChat: +8613530748177

Bluetooth
USB Electronics
Mac OS App Development
iOS Development
Microcontroller Programming
Linux
Android Tablet
Windows App Development
WiFi
Embedded System
Driver Development
C
Product Development
Java
C#
$20 hourly
- 0.0/5
- (1 job)
I am a senior Hardware designer and Firmware developer. I have the experiences of 20 years in hardware design and firmware development. I am interested in collecting trends and like to create new ones make good use of them. I have kindly communication skills and quick resolution skills of issues. The principle is to ensure the best quality and to comply with the delivery date. My field of experience is as follows: - i.MX6, i.MX8 - STM32F070RBT6, STM32F103RCT6TR, STM32L152RET6, STM32F407VGT6, STM32F429ZIT6, STM32L476RGT6, STM32H743ZIT6 - ESP32-WROOM-32D, ESP32-S2-WROOM, ESP32-WROVER-E, ESP8266 - nRF51822, nRF52810, nRF52811, nRF52832, nRF52833, nRF52840, nRF52843 - RAK310, RAK811, RAK831, RAK3172, RAK4200, RAK4270 - SIM800C, SIM7000G, SIM7070G, SIM7600E, SIM7600G-H - Arduino Mega2560, Arduino Mega328P, Arduino UNO - NOR Flash, NAND Flash, SRAM, DDR, DDR2, DDR3, LPDDR3, DDR4, LPDDR4 - IMU, ECG, PPG, HRM, SPO2, CO, CO2, CH4, SO2, Temperature, Pressure, PIR, Touch - PCIe, SATA, HDMI, LVDS, USB, UART, USART, CAN, SPI, I2C, I2S, RS485/RS422, RS232C - GPS, GSM, Bluetooth, Wi-Fi, Z-Wave, Zigbee, LoRa, RFID, LTE, NFC

Bluetooth
AWS IoT Device Management
GPS
PCB Design
Circuit Design
Firmware Programming
Hardware Design
WiFi
Wireless Communication
Sensor
Arduino
LoRa
nRF52
ESP32
STM32
$45 hourly
- 0.0/5
- (0 jobs)
I am an experienced developer who is good at video business development. I have developed a complete AI video management system, including camera hardware, APP and backend management platform. Development experience includes: 1. Embedded Linux, Embedded STM32 2. Flutter development of Android, IOS 3. Streaming media platform is FreeSWITCH, Webrtc, ZLMediaKit 4. Management platform is SpringBoot Familiar with SCRUM agile development process Regular communication is important to me, so let's keep in touch.

Bluetooth
ESP32
WiFi
GPS
Embedded Linux
STM32
Embedded C
Video Camera
Flutter
Java
WebRTC
FreeSWITCH
App Development
iOS Development
Android App Development
$17 hourly
- 0.0/5
- (0 jobs)
Android,kotlin http, UI, serial，usb，Bluetooth, database, fragment, function,jetpack, navigation,projcet

Bluetooth
USB Electronics
Serial Port Interfacing
Kotlin
Android
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