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183 lines
4.7 KiB
183 lines
4.7 KiB
/********************************************************************* |
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This is an example for our nRF52 based Bluefruit LE modules |
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Pick one up today in the adafruit shop! |
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Adafruit invests time and resources providing this open source code, |
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please support Adafruit and open-source hardware by purchasing |
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products from Adafruit! |
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MIT license, check LICENSE for more information |
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All text above, and the splash screen below must be included in |
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any redistribution |
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*********************************************************************/ |
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/* |
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* This sketch demonstrate the central API(). A additional bluefruit |
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* that has bleuart as peripheral is required for the demo. |
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*/ |
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#include <bluefruit.h> |
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BLEClientDis clientDis; |
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BLEClientUart clientUart; |
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void setup() |
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{ |
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Serial.begin(115200); |
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Serial.println("Bluefruit52 Central BLEUART Example"); |
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Serial.println("-----------------------------------\n"); |
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// Initialize Bluefruit with maximum connections as Peripheral = 0, Central = 1 |
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// SRAM usage required by SoftDevice will increase dramatically with number of connections |
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Bluefruit.begin(0, 1); |
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Bluefruit.setName("Bluefruit52 Central"); |
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// Configure DIS client |
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clientDis.begin(); |
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// Init BLE Central Uart Serivce |
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clientUart.begin(); |
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clientUart.setRxCallback(bleuart_rx_callback); |
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// Increase Blink rate to different from PrPh advertising mode |
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Bluefruit.setConnLedInterval(250); |
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// Callbacks for Central |
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Bluefruit.Central.setConnectCallback(connect_callback); |
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Bluefruit.Central.setDisconnectCallback(disconnect_callback); |
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/* Start Central Scanning |
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* - Enable auto scan if disconnected |
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* - Interval = 100 ms, window = 80 ms |
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* - Don't use active scan |
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* - Start(timeout) with timeout = 0 will scan forever (until connected) |
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*/ |
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Bluefruit.Scanner.setRxCallback(scan_callback); |
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Bluefruit.Scanner.restartOnDisconnect(true); |
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Bluefruit.Scanner.setInterval(160, 80); // in unit of 0.625 ms |
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Bluefruit.Scanner.useActiveScan(false); |
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Bluefruit.Scanner.start(0); // // 0 = Don't stop scanning after n seconds |
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} |
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/** |
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* Callback invoked when scanner pick up an advertising data |
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* @param report Structural advertising data |
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*/ |
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void scan_callback(ble_gap_evt_adv_report_t* report) |
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{ |
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// Check if advertising contain BleUart service |
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if ( Bluefruit.Scanner.checkReportForService(report, clientUart) ) |
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{ |
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Serial.print("BLE UART service detected. Connecting ... "); |
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// Connect to device with bleuart service in advertising |
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Bluefruit.Central.connect(report); |
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} |
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} |
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/** |
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* Callback invoked when an connection is established |
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* @param conn_handle |
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*/ |
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void connect_callback(uint16_t conn_handle) |
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{ |
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Serial.println("Connected"); |
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Serial.print("Dicovering DIS ... "); |
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if ( clientDis.discover(conn_handle) ) |
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{ |
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Serial.println("Found it"); |
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char buffer[32+1]; |
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// read and print out Manufacturer |
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memset(buffer, 0, sizeof(buffer)); |
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if ( clientDis.getManufacturer(buffer, sizeof(buffer)) ) |
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{ |
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Serial.print("Manufacturer: "); |
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Serial.println(buffer); |
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} |
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// read and print out Model Number |
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memset(buffer, 0, sizeof(buffer)); |
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if ( clientDis.getModel(buffer, sizeof(buffer)) ) |
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{ |
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Serial.print("Model: "); |
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Serial.println(buffer); |
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} |
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Serial.println(); |
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} |
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Serial.print("Discovering BLE Uart Service ... "); |
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if ( clientUart.discover(conn_handle) ) |
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{ |
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Serial.println("Found it"); |
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Serial.println("Enable TXD's notify"); |
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clientUart.enableTXD(); |
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Serial.println("Ready to receive from peripheral"); |
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}else |
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{ |
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Serial.println("Found NONE"); |
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// disconect since we couldn't find bleuart service |
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Bluefruit.Central.disconnect(conn_handle); |
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} |
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} |
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/** |
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* Callback invoked when a connection is dropped |
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* @param conn_handle |
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* @param reason |
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*/ |
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void disconnect_callback(uint16_t conn_handle, uint8_t reason) |
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{ |
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(void) conn_handle; |
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(void) reason; |
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Serial.println("Disconnected"); |
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} |
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/** |
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* Callback invoked when uart received data |
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* @param uart_svc Reference object to the service where the data |
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* arrived. In this example it is clientUart |
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*/ |
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void bleuart_rx_callback(BLEClientUart& uart_svc) |
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{ |
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Serial.print("[RX]: "); |
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while ( uart_svc.available() ) |
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{ |
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Serial.print( (char) uart_svc.read() ); |
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} |
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Serial.println(); |
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} |
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void loop() |
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{ |
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if ( Bluefruit.Central.connected() ) |
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{ |
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// Not discovered yet |
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if ( clientUart.discovered() ) |
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{ |
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// Discovered means in working state |
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// Get Serial input and send to Peripheral |
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if ( Serial.available() ) |
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{ |
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delay(2); // delay a bit for all characters to arrive |
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char str[20+1] = { 0 }; |
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Serial.readBytes(str, 20); |
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clientUart.print( str ); |
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} |
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} |
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} |
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} |
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