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--- iothings:laboratoare:2022:lab7 [2025/09/28 17:43]
dan.tudose [Sparrow BLE Service]
+++ iothings:laboratoare:2022:lab7 [2025/09/28 17:46] (current)
dan.tudose [UUID]
@@ Line 72: / Line 72: @@
 In essence, the UUID serves the purpose of uniquely identifying information. For example, it can distinguish a specific service provided by a Bluetooth device.
+===== Advertise on BLE  =====
+Build the example below, which advertises the board on BLE. Install on your phone an app that scans nearby Bluetooth devices, such as [[https://play.google.com/store/apps/details?id=no.nordicsemi.android.mcp&hl=en&pli=1| nRF Connect]]. Check if your device is in the list.
+<code C main.cpp>
+#include <Arduino.h>
+#include <NimBLEDevice.h>
+static const char* DEVICE_NAME = "ESP32-C6 Demo";
+static NimBLEUUID SERVICE_UUID("6E400001-B5A3-F393-E0A9-E50E24DCCA9E");
+static NimBLEUUID CHAR_UUID   ("6E400002-B5A3-F393-E0A9-E50E24DCCA9E");
+NimBLEServer*         gServer = nullptr;
+NimBLEService*        gService = nullptr;
+NimBLECharacteristic* gChar = nullptr;
+void startBLE() {
+  NimBLEDevice::init(DEVICE_NAME);
+  gServer  = NimBLEDevice::createServer();
+  gService = gServer->createService(SERVICE_UUID);
+  gChar = gService->createCharacteristic(
+    CHAR_UUID,
+    NIMBLE_PROPERTY::READ
+  );
+  gChar->setValue("Hello from ESP32-C6!");
+  gService->start();
+  NimBLEAdvertising* adv = NimBLEDevice::getAdvertising();
+  // Advertise our service UUID
+  adv->addServiceUUID(SERVICE_UUID);
+  // (v2.x) Build advertising + scan-response payloads explicitly
+  NimBLEAdvertisementData advData;
+  advData.setFlags(0x06); // LE General Discoverable + BR/EDR Not Supported
+  NimBLEAdvertisementData scanData;
+  scanData.setName(DEVICE_NAME); // put the name in scan response
+  // you can also add manufacturer data here if you want:
+  // std::string mfg = "\x34\x12C6"; scanData.setManufacturerData(mfg);
+  adv->setAdvertisementData(advData);
+  adv->setScanResponseData(scanData);
+  // Appearance is still supported
+  adv->setAppearance(0x0200); // Generic Tag
+  NimBLEDevice::startAdvertising();
+}
+void setup() {
+  Serial.begin(115200);
+  while (!Serial) { delay(10); }
+  startBLE();
+  Serial.println("Advertising as ESP32-C6 Demo. Open nRF Connect -> Scan.");
+}
+void loop() {
+  delay(1000);
+}
+</code>
+{{:iothings:laboratoare:lab1-ble-scanner.jpg?300|}}
 ===== Project Overview =====