Portable sugar control system
Global HealthCare Management LLC is a US company that provides a broad spectrum of marketing services in the medical and healthcare industries. Their business development team approached PieSoft to create not just another portable glucometer, but a complex hardware solution for daily blood sugar levels.
4-Step-Solution
1. Miniature device to be shared with mobile phones
Challenges
To create the most efficient circuit for converting the audio signal to supply voltage and minimize power consumption.
Result
The main feature of the device is its lack of an independent power source. There is no need for batteries or accumulators, constant replacement, or risk of the device dying during a moment of urgency. The device connects to the headphone jack, is powered through it, and communicates with the phone. The device size was one of the smallest existing analogs. To achieve our client’s goals, some electronic components were developed specifically for this project.
A prototype made worked stably on about 90% of the mobile device models available on the market. After that, the PieSoft team prepared the project for mass production.
2. Measuring sensor: Glucometer test strips
Challenges
To solve various technological problems when manufacturing a blood glucometer test strip due to its component’s small (tenths of a millimeter) dimensions and the repeatability of measurement results by sensors.
Result
We developed high-level glucometer test strips with the best analogs characteristics: measurement time up to 5 s, accuracy up to 10%, thickness up to 0.3 mm, required amount of blood for measurement up to 2 μg, temperature from -20 to 50 degrees. PieSoft produced the chemical enzyme with the Institute of Microbiology of the National Academy of Sciences of Belarus, Minsk.
We designed the plastic backing and the conductive pattern to match the connectors available on the market and their measurement circuits. Measuring stands and
a set of accessories for small-scale glucometer test strips production were also prepared.
3. Independent glucometer device with its own screen
Challenges
To create a measurement scheme for sensors of our design.
Result
The independent glucometer was developed in parallel to the glucometer test strips and the miniature device. When creating the device design and user interface, we closely communicated with people with diabetes, discussing the convenience of implementing this and its functionality.
The blood glucometer body and LCD screen are of our own design. Bluetooth Low Energy for pairing with smartphones. Energy-efficient microcontrollers and firmware optimizations for maximum battery life.
4. IT infrastructure
Aim
To create IT infrastructure for mobile applications personal accounts on the Internet, provide an option of sending glucometer measurements to a doctor for diagnostics.
Result
PieSoft has developed mobile applications for IOS and Android for indication and storage of glucometer measurement results, and synchronization with the cloud on AWS resources.
Stack of Technologies
HW platform
- Microchip PIC18
- Nordic nRF
- ST STM32 MCU families
Communication
- Bluetooth LE
- USB
- Custom protocol via the audio port
Custom HW components
- LCD
- Transformer
- Strip connector
- 3.5 jack connector
Programming languages
- C
- Assembler
Measurements
- Instrumentation Amplifier
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