Wearable prototypes
Early-stage wearable hardware and firmware builds.
Sound Apps & Smart Watch Systems
Wi-Fi/BLE sound control apps, smart watch electronics, wearable prototypes and connected device development.
Overview
What this service covers
Firmware and companion apps for wearable and sound-controlled electronics — the sensor and display hardware plus the Wi-Fi/BLE app that drives it.
Client Problems
Problems this service solves
- A wearable prototype is planned but there's no firmware or hardware team to build it.
- An app needs to react to sound/audio input in real time.
- An existing wearable prototype's battery life or firmware stability isn't good enough to demo with confidence.
Capabilities
What we do
- Wearable device firmware
- Wi-Fi/BLE sound-control apps
- Display and touchscreen firmware
- Sensor driver integration (accelerometer, heart-rate and similar sensors)
- Low-power wearable firmware optimisation
Technologies
Tools & platforms
ESP32-class low-power microcontrollers, small display/touch controllers, and BLE for audio-control links to a companion app.
ESP32-class MCUsBLEDisplay/touch controllers
Development Process
How we approach a wearable project
- 01Concept & sensor requirements
Confirm what the wearable senses, displays and controls.
- 02Hardware/firmware architecture
Design around the power and size constraints of a wearable.
- 03Build & bench testing
Build and test firmware against the target hardware.
- 04Wearable field testing
Test on-body under real usage conditions.
Deliverables
What you receive
- Firmware source code
- Hardware design files, where custom hardware is built
- Companion app, per project scope
Testing & Validation
How wearable firmware gets validated
Firmware is bench-tested against the sensors and display it drives, then validated on-body under real usage, since a wearable's behaviour under movement and skin contact rarely matches a bench setup exactly. Battery life is measured across realistic usage patterns rather than a single best-case idle figure, and BLE reconnect behaviour is checked against the actual companion app before anything is considered ready to demo.
Applications
Where this is used
Sound-reactive accessories
Devices that respond to audio input in real time.
Fitness/health prototypes
Sensor-driven wearable devices for early product testing.
Related Services
Often paired with
Addressable LED Systems
Sound-reactive lighting using the same audio-input approach.
Android & iOS App Development
The companion app for the wearable.
Embedded Firmware Development
The low-power firmware behind the wearable.
How We Can Help
How PAK-EL LAB Can Help
If you're planning a wearable or sound-controlled device and don't have a firmware or hardware team in place, we can take on the electronics, firmware and companion app together, or pick up an existing prototype that needs its firmware stabilised. Scope, deliverables, schedule and quotation are confirmed once we know what the device senses, displays and controls, and what power/size constraints it has to work within. We work with clients internationally and collaborate remotely as standard practice.
See also: Portfolio · Addressable LED Systems · Contact
FAQ
Frequently Asked Questions
Do you build the physical wearable hardware or just the firmware?
Either, depending on scope — we can design the PCB and enclosure-ready hardware along with the firmware, or write firmware for hardware you already have.
Can the device work standalone, or does it need a phone nearby?
It depends on the design — some wearables run standalone with local sensors and display, others rely on a companion app over BLE for control or data. We build to whichever your product needs.
How do you handle battery life on a wearable?
Low-power firmware optimisation — sleep modes, duty-cycled sensor reads and efficient BLE usage — is treated as a core design constraint for wearables, not an afterthought.
Can you pick up an existing prototype and improve its firmware?
Yes, reviewing an existing prototype's firmware and improving its stability or battery life is common work alongside new builds.
Discuss Your Wearable Project
Tell us what the device needs to sense, display or control.