BLE architecture for recording simultaneous physiological signals in real time
DOI:
https://doi.org/10.17979/ja-cea.2026.47.13678Keywords:
Bio-signals analysis and interpretation, Sensor networks, Systems with time-delays, Remote sensor data acquisition, Real-time algorithms, scheduling, and programmingAbstract
Bluetooth Low Energy (BLE) technology is the first wireless solution that addresses the key challenges of monitoring medical data. However, issues such as uneven reception, channel congestion, and packet loss arise in scenarios involving simultaneous, real-time multi-connection. To mitigate these issues, we present a BLE architecture designed for simultaneously recording electrocardiogram (ECG) and photoplethysmography (PPG) signals. This architecture is based on organizing connection intervals and events, as well as incorporating a time offset. The system accounts for maximum transmission unit (MTU) limitations between two XIAO nRF52840 development modules, programmed in CircuitPython and integrated with PPG and ECG sensors, and a mobile or desktop receiving device. The results described in this paper demonstrate significant improvements in data integrity by coordinating communication between nodes and overcoming the limitations of unscheduled data acquisition.
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Copyright (c) 2026 Marta Nadal-Herraiz, Juan David Romero-Ante, Sergio Lidón-Calvo, Daniel Alejandro Rodríguez-López, Julián David Rojas-Gravier, José María Sabater-Navarro
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
