File content as of revision 2:99e00e9c5035:

#include "ADXL345_I2C.h"
#include "mbed.h"
#include "ble/BLE.h"

#include "ble/services/UARTService.h"

#define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console;
                               * it will have an impact on code-size and power consumption. */

#if NEED_CONSOLE_OUTPUT
#define DEBUG(...) { printf(__VA_ARGS__); }
#else
#define DEBUG(...) /* nothing */
#endif /* #if NEED_CONSOLE_OUTPUT */

 ADXL345_I2C accelerometer(p7, p30);
 Serial pc(USBTX, USBRX);
 BLEDevice  ble;
 DigitalOut led1(LED1);
 UARTService *uartServicePtr;
 
 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
{
    DEBUG("Disconnected!\n\r");
    DEBUG("Restarting the advertising process\n\r");
    ble.startAdvertising();
}

void onDataWritten(const GattWriteCallbackParams *params)
{
    if ((uartServicePtr != NULL) && (params->handle == uartServicePtr->getTXCharacteristicHandle())) {
        uint16_t bytesRead = params->len;
        DEBUG("received %u bytes\n\r", bytesRead);
        ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), params->data, bytesRead);
    }
}

void periodicCallback(void)
{
    led1 = !led1;
}


 int main() {
       pc.baud(9600);
     int readings[3] = {0, 0, 0};
     
     pc.printf("Starting ADXL345 test...\n");
     wait(.001);
     pc.printf("Device ID is: 0x%02x\n", accelerometer.getDeviceID());
    wait(.001);
    
    //Go into standby mode to configure the device.
    accelerometer.setPowerControl(0x00);

    //Full resolution, +/-16g, 4mg/LSB.
    accelerometer.setDataFormatControl(0x0B);
    
    //3.2kHz data rate.
    accelerometer.setDataRate(ADXL345_3200HZ);

    //Measurement mode.
    accelerometer.setPowerControl(0x08);
    
    led1 = 1;
    Ticker ticker;
    ticker.attach(periodicCallback, 1);

    DEBUG("Initialising the nRF51822\n\r");
    ble.init();
    ble.onDisconnection(disconnectionCallback);
    ble.onDataWritten(onDataWritten);

    /* setup advertising */
    ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
    ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
    ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
                                     (const uint8_t *)"BLE UART", sizeof("BLE UART") - 1);
    ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
                                     (const uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed));

    ble.setAdvertisingInterval(1000); /* 1000ms; in multiples of 0.625ms. */
    ble.startAdvertising();

    UARTService uartService(ble);
    uartServicePtr = &uartService;
 
     while (1) {
         ble.waitForEvent();
         wait(0.1);
         accelerometer.getOutput(readings);
         pc.printf("%i, %i, %i\n", (int16_t)readings[0], (int16_t)readings[1], (int16_t)readings[2]);
     }
 
 }