Bluetooth Device Setup

GATT Service Configuration

The dashboard uses the following BLE specifications to connect to the hardware:

ESP32 BLE Sketch Code

Flash your ESP32 with this service setup to start streaming data:

#include <BLEDevice.h>
#include <BLEServer.h>
#include <BLE2902.h>

#define SERVICE_UUID        "de991000-f9a1-43e8-abdf-14022c45aa3c"
#define CHARACTERISTIC_UUID "de991001-f9a1-43e8-abdf-14022c45aa3c"

BLECharacteristic* pCharacteristic;

void setup() {
  BLEDevice::init("RenalSense-Monitor");
  BLEServer* pServer = BLEDevice::createServer();
  BLEService* pService = pServer->createService(SERVICE_UUID);
  pCharacteristic = pService->createCharacteristic(
                      CHARACTERISTIC_UUID,
                      BLECharacteristic::PROPERTY_NOTIFY
                    );
  pCharacteristic->addDescriptor(new BLE2902());
  pService->start();
  pServer->getAdvertising()->start();
}
            

Browser Requirements

• Supported Browsers: Chrome, Edge, Opera, or Bluefy (iOS). Safari/Firefox are not natively supported due to Web Bluetooth limitations.
• Security Requirements: Web Bluetooth requires a secure context (HTTPS) when deployed, or runs locally via localhost.