A GattClient example based on ST BlueNRG driving an LED service exported by a BLE_LED peripheral. Shows scanning, connections, service-discovery, and reads/writes.

Dependencies:   BLE_API X_NUCLEO_IDB0XA1 mbed

Revision:
3:b2bf47485f85
Parent:
2:c944cfe08e79
--- a/main.cpp	Fri Feb 19 15:32:04 2016 +0000
+++ b/main.cpp	Fri Feb 26 11:09:13 2016 +0000
@@ -1,4 +1,3 @@
-#if 0
 /* mbed Microcontroller Library
  * Copyright (c) 2006-2013 ARM Limited
  *
@@ -175,289 +174,4 @@
 int main(void)
 {
     BLE::Instance().init(bleInitComplete);
-}
-
-#endif
-
-
-
-
-
-/* mbed Microcontroller Library
- * Copyright (c) 2006-2015 ARM Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "mbed.h"
-#include "ble/Gap.h"
-#include "ble/BLE.h"
-#include "ble/DiscoveredCharacteristic.h"
-#include "ble/DiscoveredService.h"
-#include "ble/GapAdvertisingParams.h"
-
-
-#define PRINTF(...) printf(__VA_ARGS__)
-
-BLE  ble;
-DigitalOut led1(LED1);
-
-
-bool _connected = false;
-
-DiscoveredCharacteristic hrmCharacteristic;
-static volatile bool  triggerHrmCharacteristic = false;
-//PROTOTYPES
-void PrintScanResult(const Gap::AdvertisementCallbackParams_t *params);
-void periodicCallback(void);
-void connectToDevice(const Gap::Address_t peerAddr);
-
-void serviceDiscoveryCallback(const DiscoveredService *service); 
-void characteristicDiscoveryCallback(const DiscoveredCharacteristic *characteristicP); 
-void discoveryTerminationCallback(Gap::Handle_t connectionHandle);
-
-
-void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params) {
-    _connected = false;
-    PRINTF("disconnected\r\n");
-}
-
-void periodicCallback(void)
-{
-    led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
-    /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
-     * heavy-weight sensor polling from the main thread. */
-    triggerHrmCharacteristic = true;
-}
-
-void PrintScanResult(const Gap::AdvertisementCallbackParams_t *params)
-{
-     for(int8_t i = 5; i>=0; i--)
-    {
-       PRINTF("%02x",params->peerAddr[i] );
-       if(i != 0)PRINTF("-");
-    }
-    PRINTF("\r\n");
-    
-    PRINTF("RSSI: %d\r\n",params->rssi );
-    
-    if(params->isScanResponse){
-        PRINTF("isScanResponse=true\r\n");
-    } else {
-        PRINTF("isScanResponse=false\r\n");
-    }
-   
-    switch(params->type)
-    {
-     case GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED:
-                                        PRINTF("ADV_CONNECTABLE_UNDIRECTED\r\n");
-                                        break;
-     case GapAdvertisingParams::ADV_CONNECTABLE_DIRECTED:
-                                        PRINTF("ADV_CONNECTABLE_DIRECTED\r\n");
-                                        break;
-     case GapAdvertisingParams::ADV_SCANNABLE_UNDIRECTED:
-                                        PRINTF("ADV_SCANNABLE_UNDIRECTED\r\n");
-                                        break;
-     case GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED:
-                                        PRINTF("ADV_NON_CONNECTABLE_UNDIRECTED\r\n");
-                                        break;  
-         
-    }
-    
-    PRINTF("advertisingDataLen: %d\r\n",params->advertisingDataLen );
-    
-    PRINTF("advertisingData: "); 
-    for(int i=0; i < params->advertisingDataLen; i++)
-    {
-        PRINTF("%02x",params->advertisingData[i]);
-        if(i != params->advertisingDataLen - 1)PRINTF("-");
-    }
-    PRINTF("\r\n");
-}
-
-
-void scanResultReceived(const Gap::AdvertisementCallbackParams_t *params)
-{
-    PRINTF("\r\nscanResultReceived\r\n");
-    
-    //print advertsing values
-   PrintScanResult(params);
-   
-   PRINTF("scan result ... try connect\r\n");
-   connectToDevice(params->peerAddr);
-}
-
-void connectToDevice(const Gap::Address_t peerAddr)
-{
-   ble_error_t  ret = ble.gap().connect(peerAddr, Gap::ADDR_TYPE_PUBLIC, NULL, NULL);
-   
-   if(ret == BLE_ERROR_NONE) { 
-           PRINTF("SUCCESS: connect\r\n");
-          } else {
-                 PRINTF("ERROR : connect\r\n");
-                 }
-}
-
-void serviceDiscoveryCallback(const DiscoveredService *service) { 
-    PRINTF("Service discovery callback\r\n");
-    
-    if (service->getUUID().shortOrLong() == UUID::UUID_TYPE_SHORT) {
-        PRINTF("S UUID-%x attrs[%u %u]\r\n", service->getUUID().getShortUUID(), service->getStartHandle(), service->getEndHandle());
-    } else {
-        printf("S UUID-");
-        const uint8_t *longUUIDBytes = service->getUUID().getBaseUUID();
-        for (unsigned i = 0; i < UUID::LENGTH_OF_LONG_UUID; i++) {
-            printf("%02x", longUUIDBytes[i]);
-        }
-        PRINTF(" attrs[%u %u]\r\n", service->getStartHandle(), service->getEndHandle());
-    }
-}
- 
-void characteristicDiscoveryCallback(const DiscoveredCharacteristic *characteristicP) {
-    PRINTF("Characteristic discovery callback\r\n");
-    
-    PRINTF("  C UUID-%x valueAttr[%u] props[%x]\r\n", characteristicP->getUUID().getShortUUID(), characteristicP->getValueHandle(), (uint8_t)characteristicP->getProperties().broadcast());
-    //TODO: use hear rate characteristic
-    if (characteristicP->getUUID().getShortUUID() == 0x2A00) {
-        hrmCharacteristic = *characteristicP;
-        triggerHrmCharacteristic = true;
-       PRINTF("device name characteristic found\r\n");
-    }
-}
- 
-void discoveryTerminationCallback(Gap::Handle_t connectionHandle) {
-    PRINTF("terminated SD for handle %u\r\n", connectionHandle);
-}
-
-void timeoutCallback(Gap::TimeoutSource_t param) {
-    
-    switch(param)
-    {
-        case Gap::TIMEOUT_SRC_ADVERTISING:
-                                    PRINTF("Timeout: Advertising\r\n");
-                                    break;
-        case Gap::TIMEOUT_SRC_SECURITY_REQUEST:
-                                    PRINTF("Timeout: Security access\r\n");
-                                    break;
-        case Gap::TIMEOUT_SRC_SCAN:
-                                    PRINTF("Timeout: Scan\r\n");
-                                    break;
-        case Gap::TIMEOUT_SRC_CONN:
-                                    PRINTF("Timeout: Conn\r\n");
-                                    break;
-    }
-}
- 
-void connectionCallback(const Gap::ConnectionCallbackParams_t *params) {
-    if (params->role == Gap::CENTRAL) {
-        PRINTF("Launch service discovery\r\n");
-        //TODO: use heart rate service
-        ble.gattClient().onServiceDiscoveryTermination(discoveryTerminationCallback);
-        ble.gattClient().launchServiceDiscovery(params->handle, serviceDiscoveryCallback, characteristicDiscoveryCallback, 0x1800, 0x2A00);
-        _connected = true;
-     //   ble.gattClient().launchServiceDiscovery(params->handle, serviceDiscoveryCallback, characteristicDiscoveryCallback, GattService::UUID_HEART_RATE_SERVICE, GattCharacteristic::UUID_HEART_RATE_MEASUREMENT_CHAR); //BLE_UUID_UNKNOWN
-    }
-    else {
-        PRINTF("No central role\r\n");
-    }
-}
-
-
-void readCallback(const GattReadCallbackParams *response)
-{
-    PRINTF("readCallback\r\n");
-    
-    if (response->handle == hrmCharacteristic.getValueHandle()) {
-            PRINTF("readCallback: handle %u, offset %u, len %u\r\n", response->handle, response->offset, response->len);
-            for (unsigned index = 0; index < response->len; index++) {
-                PRINTF("%c[%02x]", response->data[index], response->data[index]);
-            }
-            PRINTF("\r\n");
-        }
-}
-
-/** 
- * This function is called when the ble initialization process has failled 
- */ 
-void onBleInitError(BLE &ble, ble_error_t error) 
-{ 
-    PRINTF("BLE init error"); 
-}
-
-/** 
- * Callback triggered when the ble initialization process has finished 
- */ 
-void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) 
-{
-    
-    PRINTF("init complete\r\n");
-    
-    BLE&        ble   = params->ble;
-    ble_error_t error = params->error;
- 
-    if (error != BLE_ERROR_NONE) {
-        /* In case of error, forward the error handling to onBleInitError */
-        PRINTF("Error init\r\n");
-        onBleInitError(ble, error);
-        return;
-    }
- 
-    /* Ensure that it is the default instance of BLE */
-    if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
-        PRINTF("Error default instance\r\n");
-        return;
-    }
- 
-   ble.onTimeout(timeoutCallback);
-   ble.onConnection(connectionCallback);
-   ble.onDisconnection(disconnectionCallback);
-   ble.gattClient().onDataRead(readCallback);
-   
-    ble.gap().setScanParams(300, 300);
-    ble.gap().startScan(scanResultReceived);
-    PRINTF("scan started...\r\n");
-
-    
-    // infinite loop
-    while (1) {
-        // check for trigger from periodicCallback()
-         if (triggerHrmCharacteristic && !ble.gattClient().isServiceDiscoveryActive() && _connected) {
-            
-            triggerHrmCharacteristic = false;
-            PRINTF("START READ\r\n");
-            hrmCharacteristic.read(); 
-            
-        } else {
-            ble.waitForEvent(); // low power wait for event
-        }
-    }
-  
-    
-   
-    
-}
-
-int main(void)
-{
-    PRINTF("started...\r\n");
-    
-    led1 = 1;
-    Ticker ticker;
-    ticker.attach(periodicCallback, 1); // blink LED every second
-    
-    _connected = false;
-    
-    PRINTF("start init...\r\n");
-    
-    ble.init(bleInitComplete);  
 }
\ No newline at end of file