This This paper presents the study of an ESP32-assisted instrument for geolocation and detection of child ECG. The aim is to highlight the ingenuity and interest of the proposed instrument. This instrument differs from most similar products in existence by its multiple geolocation features of the child based on a GPS module (Ex: Type NEO-6M-0-001), and telemetry of the child's heart rate by ECG probe (e.g. type AD8232). Analog-to-digital conversion and digital processing of vital GPS and ECG signals on the child’s body is a microcontroller mini-card (e.g. ESP32), which then transmits digitally reconstructed vital parameters via a computer. The algorithm of the proposed instrument, is implemented using the CAD software Arduino/EDI - C++, followed by the download of the executable code on target ESP32 and the real-time test successfully on a child model of 1 year 6 months. Local measurement and monitoring results of geolocation and acquisition of ECG are satisfactory. We plan to extend the local virtual monitoring technology of this new instrument, to cases of mobile Android targets via the Internet.