Datasheet

// Peripheral uart service

BLEUart bleuart;

// Central uart client

BLEClientUart clientUart;

void setup()

{

Serial.begin(115200);

Serial.println("Bluefruit52 Dual Role BLEUART Example");

Serial.println("-------------------------------------\n");

// Initialize Bluefruit with max concurrent connections as Peripheral = 1, Central = 1

// SRAM usage required by SoftDevice will increase with number of connections

Bluefruit.begin(1, 1);

// Set max power. Accepted values are: -40, -30, -20, -16, -12, -8, -4, 0, 4

Bluefruit.setTxPower(4);

Bluefruit.setName("Bluefruit52 duo");

// Callbacks for Peripheral

Bluefruit.setConnectCallback(prph_connect_callback);

Bluefruit.setDisconnectCallback(prph_disconnect_callback);

// Callbacks for Central

Bluefruit.Central.setConnectCallback(cent_connect_callback);

Bluefruit.Central.setDisconnectCallback(cent_disconnect_callback);

// Configure and Start BLE Uart Service

bleuart.begin();

bleuart.setRxCallback(prph_bleuart_rx_callback);

// Init BLE Central Uart Serivce

clientUart.begin();

clientUart.setRxCallback(cent_bleuart_rx_callback);

/* Start Central Scanning

* - Enable auto scan if disconnected

* - Interval = 100 ms, window = 80 ms

* - Filter only accept bleuart service

* - Don't use active scan

* - Start(timeout) with timeout = 0 will scan forever (until connected)

Bluefruit.Scanner.setRxCallback(scan_callback);

Bluefruit.Scanner.restartOnDisconnect(true);

Bluefruit.Scanner.setInterval(160, 80); // in unit of 0.625 ms

Bluefruit.Scanner.filterUuid(bleuart.uuid);

Bluefruit.Scanner.useActiveScan(false);

Bluefruit.Scanner.start(0); // 0 = Don't stop scanning after n seconds

// Set up and start advertising

startAdv();

}

void startAdv(void)

{

// Advertising packet

Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);