diff options
Diffstat (limited to 'arduino/libraries/Bluefruit52Lib/examples/Peripheral/custom_hrm/custom_hrm.ino')
| -rwxr-xr-x | arduino/libraries/Bluefruit52Lib/examples/Peripheral/custom_hrm/custom_hrm.ino | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/arduino/libraries/Bluefruit52Lib/examples/Peripheral/custom_hrm/custom_hrm.ino b/arduino/libraries/Bluefruit52Lib/examples/Peripheral/custom_hrm/custom_hrm.ino new file mode 100755 index 0000000..ea7f63d --- /dev/null +++ b/arduino/libraries/Bluefruit52Lib/examples/Peripheral/custom_hrm/custom_hrm.ino @@ -0,0 +1,224 @@ +/********************************************************************* + This is an example for our nRF52 based Bluefruit LE modules + + Pick one up today in the adafruit shop! + + Adafruit invests time and resources providing this open source code, + please support Adafruit and open-source hardware by purchasing + products from Adafruit! + + MIT license, check LICENSE for more information + All text above, and the splash screen below must be included in + any redistribution +*********************************************************************/ +#include <bluefruit.h> + +/* HRM Service Definitions + * Heart Rate Monitor Service: 0x180D + * Heart Rate Measurement Char: 0x2A37 + * Body Sensor Location Char: 0x2A38 + */ +BLEService hrms = BLEService(UUID16_SVC_HEART_RATE); +BLECharacteristic hrmc = BLECharacteristic(UUID16_CHR_HEART_RATE_MEASUREMENT); +BLECharacteristic bslc = BLECharacteristic(UUID16_CHR_BODY_SENSOR_LOCATION); + +BLEDis bledis; // DIS (Device Information Service) helper class instance +BLEBas blebas; // BAS (Battery Service) helper class instance + +uint8_t bps = 0; + +void setup() +{ + Serial.begin(115200); + while ( !Serial ) delay(10); // for nrf52840 with native usb + + Serial.println("Bluefruit52 HRM Example"); + Serial.println("-----------------------\n"); + + // Initialise the Bluefruit module + Serial.println("Initialise the Bluefruit nRF52 module"); + Bluefruit.begin(); + + // Set the advertised device name (keep it short!) + Serial.println("Setting Device Name to 'Feather52 HRM'"); + Bluefruit.setName("Bluefruit52 HRM"); + + // Set the connect/disconnect callback handlers + Bluefruit.setConnectCallback(connect_callback); + Bluefruit.setDisconnectCallback(disconnect_callback); + + // Configure and Start the Device Information Service + Serial.println("Configuring the Device Information Service"); + bledis.setManufacturer("Adafruit Industries"); + bledis.setModel("Bluefruit Feather52"); + bledis.begin(); + + // Start the BLE Battery Service and set it to 100% + Serial.println("Configuring the Battery Service"); + blebas.begin(); + blebas.write(100); + + // Setup the Heart Rate Monitor service using + // BLEService and BLECharacteristic classes + Serial.println("Configuring the Heart Rate Monitor Service"); + setupHRM(); + + // Setup the advertising packet(s) + Serial.println("Setting up the advertising payload(s)"); + startAdv(); + + Serial.println("Ready Player One!!!"); + Serial.println("\nAdvertising"); +} + +void startAdv(void) +{ + // Advertising packet + Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE); + Bluefruit.Advertising.addTxPower(); + + // Include HRM Service UUID + Bluefruit.Advertising.addService(hrms); + + // Include Name + Bluefruit.Advertising.addName(); + + /* Start Advertising + * - Enable auto advertising if disconnected + * - Interval: fast mode = 20 ms, slow mode = 152.5 ms + * - Timeout for fast mode is 30 seconds + * - Start(timeout) with timeout = 0 will advertise forever (until connected) + * + * For recommended advertising interval + * https://developer.apple.com/library/content/qa/qa1931/_index.html + */ + Bluefruit.Advertising.restartOnDisconnect(true); + Bluefruit.Advertising.setInterval(32, 244); // in unit of 0.625 ms + Bluefruit.Advertising.setFastTimeout(30); // number of seconds in fast mode + Bluefruit.Advertising.start(0); // 0 = Don't stop advertising after n seconds +} + +void setupHRM(void) +{ + // Configure the Heart Rate Monitor service + // See: https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.service.heart_rate.xml + // Supported Characteristics: + // Name UUID Requirement Properties + // ---------------------------- ------ ----------- ---------- + // Heart Rate Measurement 0x2A37 Mandatory Notify + // Body Sensor Location 0x2A38 Optional Read + // Heart Rate Control Point 0x2A39 Conditional Write <-- Not used here + hrms.begin(); + + // Note: You must call .begin() on the BLEService before calling .begin() on + // any characteristic(s) within that service definition.. Calling .begin() on + // a BLECharacteristic will cause it to be added to the last BLEService that + // was 'begin()'ed! + + // Configure the Heart Rate Measurement characteristic + // See: https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.heart_rate_measurement.xml + // Properties = Notify + // Min Len = 1 + // Max Len = 8 + // B0 = UINT8 - Flag (MANDATORY) + // b5:7 = Reserved + // b4 = RR-Internal (0 = Not present, 1 = Present) + // b3 = Energy expended status (0 = Not present, 1 = Present) + // b1:2 = Sensor contact status (0+1 = Not supported, 2 = Supported but contact not detected, 3 = Supported and detected) + // b0 = Value format (0 = UINT8, 1 = UINT16) + // B1 = UINT8 - 8-bit heart rate measurement value in BPM + // B2:3 = UINT16 - 16-bit heart rate measurement value in BPM + // B4:5 = UINT16 - Energy expended in joules + // B6:7 = UINT16 - RR Internal (1/1024 second resolution) + hrmc.setProperties(CHR_PROPS_NOTIFY); + hrmc.setPermission(SECMODE_OPEN, SECMODE_NO_ACCESS); + hrmc.setFixedLen(2); + hrmc.setCccdWriteCallback(cccd_callback); // Optionally capture CCCD updates + hrmc.begin(); + uint8_t hrmdata[2] = { 0b00000110, 0x40 }; // Set the characteristic to use 8-bit values, with the sensor connected and detected + hrmc.notify(hrmdata, 2); // Use .notify instead of .write! + + // Configure the Body Sensor Location characteristic + // See: https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.body_sensor_location.xml + // Properties = Read + // Min Len = 1 + // Max Len = 1 + // B0 = UINT8 - Body Sensor Location + // 0 = Other + // 1 = Chest + // 2 = Wrist + // 3 = Finger + // 4 = Hand + // 5 = Ear Lobe + // 6 = Foot + // 7:255 = Reserved + bslc.setProperties(CHR_PROPS_READ); + bslc.setPermission(SECMODE_OPEN, SECMODE_NO_ACCESS); + bslc.setFixedLen(1); + bslc.begin(); + bslc.write8(2); // Set the characteristic to 'Wrist' (2) +} + +void connect_callback(uint16_t conn_handle) +{ + char central_name[32] = { 0 }; + Bluefruit.Gap.getPeerName(conn_handle, central_name, sizeof(central_name)); + + Serial.print("Connected to "); + Serial.println(central_name); +} + +/** + * Callback invoked when a connection is dropped + * @param conn_handle connection where this event happens + * @param reason is a BLE_HCI_STATUS_CODE which can be found in ble_hci.h + * https://github.com/adafruit/Adafruit_nRF52_Arduino/blob/master/cores/nRF5/nordic/softdevice/s140_nrf52_6.1.1_API/include/ble_hci.h + */ +void disconnect_callback(uint16_t conn_handle, uint8_t reason) +{ + (void) conn_handle; + (void) reason; + + Serial.println("Disconnected"); + Serial.println("Advertising!"); +} + +void cccd_callback(BLECharacteristic& chr, uint16_t cccd_value) +{ + // Display the raw request packet + Serial.print("CCCD Updated: "); + //Serial.printBuffer(request->data, request->len); + Serial.print(cccd_value); + Serial.println(""); + + // Check the characteristic this CCCD update is associated with in case + // this handler is used for multiple CCCD records. + if (chr.uuid == hrmc.uuid) { + if (chr.notifyEnabled()) { + Serial.println("Heart Rate Measurement 'Notify' enabled"); + } else { + Serial.println("Heart Rate Measurement 'Notify' disabled"); + } + } +} + +void loop() +{ + digitalToggle(LED_RED); + + if ( Bluefruit.connected() ) { + uint8_t hrmdata[2] = { 0b00000110, bps++ }; // Sensor connected, increment BPS value + + // Note: We use .notify instead of .write! + // If it is connected but CCCD is not enabled + // The characteristic's value is still updated although notification is not sent + if ( hrmc.notify(hrmdata, sizeof(hrmdata)) ){ + Serial.print("Heart Rate Measurement updated to: "); Serial.println(bps); + }else{ + Serial.println("ERROR: Notify not set in the CCCD or not connected!"); + } + } + + // Only send update once per second + delay(1000); +} |