Profile image of DreamCha
Flag of China Dandong, China
Member since March 28, 2013
8 Recommendations


Online Offline
How are you? I am a Senior Electronic and Embedded Engineer with expertise in Home Automation System and Embedded System, product prototyping, Schematic & PCB design and firmware development. As I'm a Master of Computer Science, I have 15 years of experience in products development using the follows skills: - Circuit & Schematic & PCB design - Prototype & Mass production - Microcontroller programming using STM32WB/STM32, ESP32/ESP8266, Arduino, BLE/Bluetooth, WiFi, Ethernet, Zig-bee, GSM/GPS/GPRS/GNSS, Z-Wave - Various LCDs & Sensors, I2C/I2S/SPI, RS232/485, Lora, NFC/RFID - various PLC & HMI programming such as ADAM, Siemens, Delta, Mitsubishi - Various Servo/Motor control - Mobile app development for the Hardware - Windows application development using C#/C++, VB So, I can take your project from concept to finished product. I will do my best to complete your project quickly, and I will provide the best service of high quality. Thank you.
$36 USD/hr
56 reviews
  • 96%Jobs Completed
  • 99%On Budget
  • 99%On Time
  • 12%Repeat Hire Rate


Recent Reviews

  • image of Siraj A. Project for Linguang L. $1.00 CAD

    “Yes he did a great job.”

  • image of Rahul V. LoRAWAN based Monitoring system for Digital Calipers -- 2 $1250.00 USD

    “Great worker ! He knows his work thoroughly.”

  • image of James Edward M. Project for Linguang L. -- 2 $70.00 USD

    “Linguang L is a professional developer. Has a prompt communication skills. Strongly recommend him.”

  • image of Lawrence G. Project for Linguang L. -- 3 £750.00 GBP

    “Linguang is extremely hard working and will find a way to resolve any issues and complete the job. I would highly recommend using this freelancer and I look forward to working with him again in the future.”

  • image of Bill C. Hardware design modification and firmware update $1200.00 USD

    “Good to work with. Doing more work with Linguang to expand the scope of the project.”

  • image of Tilman J. PCB design & micro-controller programming for IR-sensor device $700.00 SGD

    “Incredibly talented!!! Linguang's ability to comprehend the scope of a task quickly is truly astonishing. His critical view & feedback to our initial design proposal opened us the door to lift our project to a whole new level. His creative footprint will be clearly visible in our final product and we will make sure that he's part of the further process.”


Firmware/Hardware engineer

Nov 2005 - Aug 2010 (4 years)

I have been developing several products that contain RFID, zigbee, Bluetooth 2.1, 4.0, USB, RS485/232, Wifi, Zwave and so on. I have rich experiences for hardware/software design/development. I have been developing several projects for C#/C++, Visual Basic, PHP, XML, ASP.NET.


Master of Computer Science

2001 - 2005 (4 years)


Master (2011)

Computer Application

I'm a master of Computer Application.



This include the content for the fingerprint image reader designing.


  • C# 1
  • Preferred Freelancer Program SLA
  • Numeracy 1
  • UK English 1
  • Android 1
  • C 1
  • US English Level 1


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