As the global demand for customized smart wearables continues to rise, more brands, system integrators, and IoT solution providers are choosing ESP32-based smartwatch PCB designs as their core hardware platform.

Thanks to its powerful MCU performance, integrated WiFi + Bluetooth, and ultra-low-power architecture, ESP32 has become one of the most popular chips for custom smartwatch OEM and ODM projects.

This guide introduces how to design, optimize, and mass-produce an ESP32 Smartwatch Custom PCB, and why working with a professional OEM manufacturer like Shenzhen Geyan Technology Co., Ltd. significantly reduces development risks and time-to-market.

Why Choose ESP32 for Smartwatch PCB Design?

ESP32 is widely adopted in next-generation smartwatches, smart bands, and smart rings because it provides:

·  Dual-core MCU with strong processing capability

·  Integrated WiFi + BLE for cloud and mobile APP connection

·  Ultra-low-power sleep modes for extended battery life

·  Rich peripheral interfaces for sensor integration

·  Excellent cost-performance ratio for mass production

These features make ESP32 ideal for:

·  Health monitoring smartwatches

·  Smart fitness bands

·  Bluetooth calling watches

·  IoT cloud-connected wearables

·  Custom smart rings and medical devices

Core Structure of ESP32 Smartwatch PCB

A professional ESP32 smartwatch PCB design generally includes the following modules:

Low-Power PCB Optimization for Long Battery Life

Battery performance is one of the most critical design factors in wearable devices.
Geyan Technology applies multi-layer low-power PCB architecture:

·  Dedicated sleep power domains

·  Dynamic voltage scaling

·  BLE optimized communication stack

·  Sensor power gating

·  Smart battery charging and protection ICs

With optimized PCB layout and firmware, our ESP32 smartwatches can achieve:

·  20–30 days normal usage

·  45–60 days standby

·  Support for solar-assisted charging projects

Custom ESP32 Smartwatch PCB Design Services

Founded in 2012, Shenzhen Geyan Technology Co., Ltd. is a national high-tech enterprise specializing in smart wearable OEM/ODM solutions.
With over 15 years of experience in intelligent electronics manufacturing, Geyan Technology is recognized as one of the pioneers of China’s smartwatch industry.

We provide full-cycle ESP32 smartwatch PCB customization services, including:

·  Schematic design & multilayer PCB layout

·  Sensor integration (HR, SpO₂, ECG, GPS, temperature, etc.)

·  Firmware development & SDK support

·  Mobile APP & cloud data integration

·  EMC/CE/FCC compliance design

·  Small batch prototype and mass production

Supported Smart Wearable Products

Our ESP32 custom PCB platforms are widely used in:

· Health & Fitness Smartwatches

· Business & Lifestyle Smartwatches

· Multi-sport GPS Smartwatches

· Smart Fitness Bands

· Custom Smart Rings

· Muslim Smartwatches

· TENS / EMS Smartwatches

All products support logo branding, UI customization, packaging design, and private label production.

OEM & ODM Manufacturing Advantages

·  Independent R&D team

·  SMT in-house production lines

·  Strict QC & aging tests

·  Flexible MOQ for startups and brands

·  Fast lead time for global projects

·  Competitive factory pricing

Our own brands — Jieshilang, Jersa, and Xinan — reflect our commitment to innovation, quality, and user satisfaction.

Why Brands Choose Geyan Technology

· Pioneer member of Smart Wearable Industry Association

· Standing committee member of Chip Industry Promotion Association

· 15+ years wearable manufacturing experience

· One-stop solution from PCB to cloud platform

· Proven global OEM project cases

Start Your ESP32 Smartwatch PCB Project

Whether you are developing a new smartwatch brand, launching a medical wearable project, or upgrading your existing wearable platform, our ESP32 smartwatch custom PCB solutions offer a reliable, scalable, and cost-effective foundation.