BitL Assistive Technology
Developing custom solutions for people with special needs.
Our work
We do R&D in assistive technologies. We look for special solutions for people with special needs. Our projects make intensive use of electronic and data technology, focussed on the customer, driven by the principle of utility and affordability and deeply committed to ethics.
Our clients
Behind our solutions there is always a story. We work hard to find solutions for those who think technology can improve their quality of life, health and safety.
Our latest projects
The following projects are custom assistive systems for the blind and senior people we have developed recently. These are the creative response of BitL to the special requirements of our clients.
Personal navigation assistant for blind kayakers

This assistive system helps blind kayakers to rise their self-confidence in open waters. They have increased their independence and now can navigate in a safer way. With this three-component system, paddlers know where they are at all times. They have information about heading, bearing, distance to the shore, distance to the POIs, among others. We developed two custom wearable compasses, a gestural recognition algorithm and a voice assistant. The kayaker can choose a destination point with a head gesture and then, the system will guide them to there using the voice synthesizer, all hands free...
... more about this solution
Unobtrusive home activity tracker with fall detection capability

We have developed an ecosystem of custom wireless sensors carefully distributed throughout the house. Movement sensors, bed occupancy sensors, and magnetic sensors are wirelessly connected to a main processor running a tailored algorithm which keep track of the activity in the home ...
... more about this solution
... more about this solution
Unobtrusive under-the-mattress sleep tracker

Everybody knows the importance of good night's rest and its relationship to the health and well-being. Scientists have discovered a strong link between changes in sleep patterns and some health issues. Recent studies seem to show that these variations can predict some health disorders, both physical and mental. Normally, these patterns shift slowly, so the changes could be hard to detect. If the person lives alone, the situation may worsen. Promoting healthy sleep is even more important for seniors. There is a natural declination of the nightly rest, so observing this behavior could be a valuable tool for the early detection of health issues.
We have developed a low-cost under-the-mattress sensor that is sensitive enough to track body movements, even the slightest ones. A custom algorithm converts these movements into sleep data and send them to a server. There, a cloud app stores data and tracks long-term changes in sleep patterns. After the processing, the outcomes are sent to the caregivers who use an Android App to access the information. In this way, they can be warned about conditions that may need to be addressed.
... more about this solution
We have developed a low-cost under-the-mattress sensor that is sensitive enough to track body movements, even the slightest ones. A custom algorithm converts these movements into sleep data and send them to a server. There, a cloud app stores data and tracks long-term changes in sleep patterns. After the processing, the outcomes are sent to the caregivers who use an Android App to access the information. In this way, they can be warned about conditions that may need to be addressed.
... more about this solution
Add-on to extract respiration data from the sleep tracker

This is the implementation and remote deployment of a post-processing add-on to extract respiratory information from the sleep tracker sensor signal using some advanced filtering techniques ...
... more about this solution
Our extensive toolbox
Custom Hardware Design
We use standard hardware whenever possible to reduce both development time and costs. Some projects have special limitations such as power, size or processing speed. In those cases we develop custom hardware to meet the requirements.
AI Algorithms
We use real-time DTW algorithms in many projects. For example, in our latest works, we have used it to recognize head movements in a hands-free human-machine interface running on limited microprocessors, or to extract respiratory and cardiac parameters from signals that are difficult to filter with traditional techniques.
Embedded Web Servers
With our own framework, we can deploy rich, fast, complex and dynamic web pages on devices like ESP8266 and ESP32. Using HTML, javascript, Bootstrap4, jQuery and Chartjs we created an embedded dashboard that allows easy configuration and monitoring of the device.
Real Time Firmware
Most of our developments work as personal assistants, so the systems have to process the data in real time. We always thoroughly analyze the time constraints in order to select the right hardware, software strategy, power requirements and communication protocols to achieve that.
Advanced Signal Processing
We use advanced processing such as the Kalman Filter in some of our solutions. For example, we have worked with a derivation of this filter to improve the performance of inertial sensors in a wearable device, which runs smoothly even on a microcontroller with severe memory and speed limitations.
Cloud Applications
In most cases we need to store the data from the assistant device, perform an after-treatment task or, depending on some criteria, transmit its status via the mobile network. In these cases, we develop applications and interfaces that run on our servers in the cloud. Node js and Node-Red are our favourite flavours.
3D Printed Parts & Devices
Our developments are so personalized that they are mostly unique. 3D printing has become a great ally in our laboratory. Whether it is complex sensors printed with special materials or simple waterproof boxes, we make intensive use of this technology, every day.
Sensors & Sensor Design
GPS. Accelerometers. Gyroscopes. Magnetometers. Environmental sensors. Electrochemical gas sensors. Radar. Piezoelectric sensors. We use sensors everywhere. In some cases we use 3D printing and special materials to create our own sensors.
Wireless Communication
We connect sensors to processors wirelessly in many of our projects. Bluetooth, BLE, WiFi, LoRa or NRF are some options. We use the wireless connection that best fits the characteristics of the project. We use MQTT, HTTP or websockets for devices connected to the cloud.
Android Apps
Android devices have become ubiquitous. There are mobiles everywhere. Sometimes we take advantage of their sensors and their processing power. Sometimes we use them as an interface device between the user and the data. Whatever the case, we develop native applications for Android as part of the solution.
About us

Alejandra Halabi, Ph.D.
- Right Brain -
Her holistic vision allows us to build creative solutions with great human warmth. She has the ability to understand the underlying needs of our clients and turn them into project requirements.
After obtaining her degree in Chemistry at the National University of Córdoba, Argentina, in 1995, Alejandra joined the Polymer Science research group, where she obtained her Ph.D. for her work in the development of new materials. Since then, she has been building a solid career, both as a scientist and an entrepreneur.
After obtaining her degree in Chemistry at the National University of Córdoba, Argentina, in 1995, Alejandra joined the Polymer Science research group, where she obtained her Ph.D. for her work in the development of new materials. Since then, she has been building a solid career, both as a scientist and an entrepreneur.

Cesar Romero, Eng.
- Left Brain -
He brings his solid technical knowledge and long experience as a developer to transform project requirements into highly reliable assistive devices and systems.
Cesar obtained his electronic engineering degree in 1994 from the National University of Cordoba, Argentina.That same year, he joined the Radar department of the University Institute of Aeronautics where he worked for more than 12 years in R&D. Since then he has worked on countless projects as an independent developer.
Cesar obtained his electronic engineering degree in 1994 from the National University of Cordoba, Argentina.That same year, he joined the Radar department of the University Institute of Aeronautics where he worked for more than 12 years in R&D. Since then he has worked on countless projects as an independent developer.
BitL for developers
We also offer support for developers, entrepreneurs and companies. If you are working on a new assistive project, we can support you with our extensive technical background and expertise. By relying on our support, you will have more time to manage your project more effectively.
We can provide advice, design, proof of concept and reformulation in one or more layers of the following stack:
Sensors
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Microcontrollers and SoCs
Low power customization
Advanced Signal Processing
Local wireless communication
Embedded dynamic web servers
Android / Raspberry as local processor and gateway
Cloud processing and data persistance
Android Apps
Soon... Data analytics