BLE Route Traces for an Android-Based Indoor Navigation Prototype

This dataset contains BLE route traces collected during the technical validation of an Android-based indoor navigation prototype for visually impaired users. The prototype integrates BLE proximity-based localization, graph-based route representation, and Text-to-Speech guidance events. The dataset includes three controlled indoor route scenarios: a straight-line route, an L-shaped route, and a triangular route. Each route was modeled using three BLE-associated navigation nodes: an initial node, an intermediate decision node, and a destination node. The corresponding BLE beacons were NAV_BLE_01, NAV_BLE_02, and NAV_BLE_03. Each CSV file contains timestamped BLE readings and navigation variables, including timestamp, route progress, true position, beacon identifier, beacon-associated node, RSSI value, estimated distance, true distance to beacon, signal quality, dominant beacon, detected node, expected navigation instruction, and Text-to-Speech event. The dataset was used to calculate BLE node recognition accuracy, mean absolute distance error, root mean square error, signal quality distribution, and Text-to-Speech guidance event counts. The data supports a preliminary technical validation of node-level indoor navigation rather than centimeter-level indoor positioning.