Swappable sensors
Change the measurement module instead of replacing the device. Configure for research, safety, wellness, or quantified-self setups.
Configurable wristband
A wristband that changes sensors for each pilot.
OpenPulse measures body signals and environment context with swappable sensor modules. Tell us what you need to measure; we configure the band, data path, and first pipeline around it.
Measure pulse, EDA, temperature, motion
Add context gas, heat, humidity, acoustics
Deliver export, dashboard, integration, alert
measures body signals
adds environment context
swap modules for each pilot
Bodypulse, stress, temperature
Contextgas, heat, humidity
Outputdata export or alert
The problem
Closed wearables are excellent products. They are poor platforms.
Most wearables are fixed at the factory: fixed sensors, fixed algorithms, fixed data access. That works for general fitness. It breaks the moment a lab, employer, resort, or open-source builder needs a specific signal mix.
01
Data is locked behind someone else's cloud.
Hard to inspect, export, reproduce, or build on.
02
Sensor stacks are built for average users.
A tennis study, a safety pilot, and an EDA experiment do not need the same hardware.
03
Research tools are changing.
The Empatica E4 has been retired, leaving teams to rethink raw biosignal wearables.1
The OpenPulse loop
From measurement need to configured wearable.
1
Define the signal
Heart rate, EDA, motion, temperature, gas, acoustics, or a use-case-specific combination.
2
Choose the sensor set
Pick modules for the wrist signals and surrounding environment, while the same band architecture stays in place.
3
Run the pipeline
Local acquisition, open processing primitives, exportable data, and pilot-specific output adapters.
Configuration layer
A wearable should start with a question, not a SKU.
For a pilot partner, the first question is never "which model do you want?" It is "what signal do you need, in which context, and what should the output trigger?"
01Choose body signals
PPG, EDA, temperature, motion.
02Add environment
Gas, ambient temperature, humidity, acoustics.
03Ship the pipeline
Local processing, export, dashboard, or alert.
input
What do you need to measure?
PPG
EDA
TEMP
GAS
IMU
pulse
stress
gas
output
pilot-ready wearable
Configured hardware, open data path, documented signal stack.
Open by design
Open API, local processing, exportable data, and an open-source core for the layers that need transparency.
Signals others skip
EDA, bioimpedance, environment sensing, and cross-sensor combinations make OpenPulse useful beyond standard fitness.
Real, not a render story
Prototype hardware exists. The next risk is deliberately visible.
The main PCB has been manufactured, assembled, and tested around the Seeed XIAO nRF52840 Sense. The round sensor-module PCBs and components are ready for assembly and reflow. The site should show both: what works today, and what is still being validated.
TestedMain PCB + BLE base
In build10 mm circular sensor modules
Next validationreflow, fit, tombstoning, signal quality
Trust block
Built for teams that need control, not lock-in.
Open source coreInspectable processing layers and community extensibility.
Local processingSignals can be processed close to the device before optional export.
Data sovereigntyNo forced subscription cloud as the central product dependency.
GDPR-aware pilotsDesigned for controlled studies and European partner conversations.
IP54 targetEveryday protection target for early pilot hardware, not a finished-device promise.
Repairable architectureSensor upgrades do not require replacing the entire wearable.
For whom
Four pilot paths first. Many more later.
Raw biosignals after the E4 era
EDA, PPG, temperature, motion, open export.
Human + environment in one band
Gas, heat, heart-rate context, local alerts.
Response measurement without a black box
EDA + HR pipelines for controlled studies.
White-label recovery and stress pilots
Configured bands for retreats and premium programs.
Blue Ocean Entrepreneurs Competition - 1st place Europe
STARTUP TEENS - Top 5 Health
Jugend grundet - Top 14 Germany
OpenPulse pilots
Building the open biosignal platform. Want in?
Bring the use case. We will map the sensor configuration, data path, and first pilot setup.