Datasheet

4. Repeat the same procedure for any other BLECharacteristics in your service.

Full Sample Code

The full sample code for this example can be seen below, but this maybe be out of sync with the latest code available

on Github. Please consult the Github code (https://adafru.it/vaP) if you have any problems with the code below.

void cccd_callback(BLECharacteristic& chr, uint16_t cccd_value)

{

// Display the raw request packet

Serial.print("CCCD Updated: ");

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");

}

#include <bluefruit.h>

#define STATUS_LED (17)

#define BLINKY_MS (2000)

/* 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

uint32_t blinkyms;

uint8_t bps = 0;

// Advanced function prototypes

void setupAdv(void);

void setupHRM(void);

void connect_callback(void);

void disconnect_callback(uint8_t reason);

void cccd_callback(BLECharacteristic& chr, ble_gatts_evt_write_t* request);

void setup()

{

Serial.begin(115200);

Serial.println("Bluefruit52 HRM Example");

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