HuanLong Z.

Hi there! We’re a small but specialized hardware development team based in Shenzhen, the heart of China’s smart electronics industry. With 11+ years of experience in embedded systems and IoT hardware design, we help startups and businesses bring their ideas to life-from concept to mass production. Known as the ULINK Team, we focus on ultra-low power smart devices, sensor integration, and wireless communication technologies like BLE, LoRa, NB-IoT, and UWB. Our BLE modules achieve standby currents as low as < 3μA, and we've built full-stack solutions for tracking, positioning, and remote sensing applications across industries. What We Do Best IoT Product Development (BLE, LoRaWAN, NB-IoT, LTE-Cat1) Custom PCB design, RF optimization, and antenna matching Embedded firmware development (nRF52, STM32, ESP32) Sensor system integration with power & battery optimization BLE SIP Module design, small form-factor, SiP packaging Prototyping, testing, certification (CE, FCC, RoHS), and manufacturing Typical Projects We’ve Delivered BLE Smart Tag (AirTag-like device) Developed ultra-small BLE 5.2 tracker with high-sensitivity antenna, < 12μA advertising mode. Supported OTA, iOS/Android compatibility. LoRaWAN Environmental Monitor Battery-powered air quality sensor using LoRaWAN and BLE dual-mode; over 5 years of battery life with remote firmware upgrade capability. BLE + GPS Asset Tracker Designed a coin-cell powered location tracker using BLE + GPS + motion sensor, for US logistics company. Smart Elevator Maintenance Module Built a remote telemetry device using BLE + LTE-Cat1 for elevator maintenance monitoring. Integrated RS485 and CAN interfaces. Parking Sensor System Designed a geomagnetic + mmWave radar dual-mode vehicle detector, using NB-IoT, achieving IP68 and > 5 years service life. Our Process From initial demand analysis -- component selection -- schematic + PCB -- firmware -- RF tuning -- rapid prototyping -- testing -- DFM -- batch production — we cover the entire product development lifecycle. Why Clients Work With Us Based in Shenzhen, with deep access to the global electronics supply chain Fast turnaround: Prototypes ready in 2–4 weeks Full stack: From hardware, firmware, to backend API connection Rich experience in global markets and certifications Flexible engagement: One-off jobs, long-term cooperation, or equity-based partnerships If you’re looking to build a smart device that’s power-efficient, production-ready, and tailored to your needs, we’d love to be your go-to hardware team. Let’s make your idea a reality.