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Health & Wellness
TempSense
AI Smart Thermometer Patch based on nRF52840
Wearable skin patch that continuously monitors temperature and predicts fever onset 2 hours in advance.
Temp Accuracy
±0.05°C
Prediction Lead
2 Hours
TempSense
Client
A medical device startup looking to create a continuous fever monitoring patch for parents to monitor children's temperature during illness.
Challenge
Developing a disposable, skin-mountable patch that maintains medical-grade temperature accuracy (±0.1°C) while being thin enough to be comfortable under clothing.
Product Concept & Architecture
The patch uses the Nordic nRF52840 with a MAX30208 clinical-grade digital temperature sensor (±0.05°C accuracy). A 2-layer flexible PCB is laminated into a 1.5mm-thick silicone patch. A CR2032 battery provides 5 days of continuous monitoring.
Engineering Solution
The firmware on Zephyr RTOS samples temperature at 1Hz, applies a median filter to remove motion artifacts, and stores a 24-hour rolling history. A lightweight gradient-boosting model on the MCU analyzes the rate of temperature change and circadian pattern deviation to predict fever onset (temperature >=38°C) up to 2 hours in advance. Alerts are sent via BLE to the parent's smartphone.
Result
±0.05°C accuracy validated against rectal thermometer (ISO 80601-56). Fever prediction AUC of 0.94 in pediatric trials. 48-hour earlier fever detection vs. spot checks.
Deep Tech FAQ
What makes the AI Smart Thermometer Patch based on nRF52840 unique?+
The AI Smart Thermometer Patch based on nRF52840 leverages custom hardware and edge AI to deliver industry-leading performance and efficiency.
What are the core technical benefits?+
Key benefits include low power consumption, real-time processing, robust connectivity, and a compact form factor tailored for deployment.
Can this architecture be adapted for other use cases?+
Absolutely. The underlying methodology is modular and can be retargeted for various applications with minimal redesign.
Project Profile
Services Delivered
Hardware DesignEmbedded Software
Core Technologies
BLETinyMLRTOS
Silicon & Vendors
NordicTI
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