I will do iot prototype, schematics, pcb design, review, ble, firmware, jlcpcb in china

Excellent engineering work. Detailed, well-documented and backed by real calculations. Took the review comments seriously, reworked the analysis properly and even corrected one of my own assumptions with datasheet evidence. Clear communication throughout. Highly recommended.

Shenglin is a highly professional engineer. When assigning him a project, there is no need to provide lengthy explanations. A single well-organized summary document is usually enough. He has the ability to understand the client’s expectations from limited information and turn them into the desired final... See more

Great work on thoroughly reviewing the feasibility of the hardware sketch and PCB design, and on successfully delivering the final report. Your dedication and technical insight made this project a real success. Thank you very much for your effort. Best Regards.

It was a pleasure working with this freelancer. They were responsive, professional, and paid close attention to the project requirements. The quality of work was outstanding, revisions were handled quickly, and everything was delivered before the deadline. I would definitely work with them again.

Excellent experience working with this developer. Communication was professional and responsive throughout the project. The firmware and IoT implementation were delivered with good code structure and stable functionality. BLE communication, sensor integration, and overall system behavior worked as expected.... See more