mirror of
https://github.com/h2zero/esp-nimble-cpp.git
synced 2024-11-22 21:20:55 +01:00
200 lines
7.5 KiB
C++
200 lines
7.5 KiB
C++
/**
|
|
* A BLE client example that is rich in capabilities.
|
|
* There is a lot new capabilities implemented.
|
|
* author unknown
|
|
* updated by chegewara
|
|
* updated for NimBLE by H2zero
|
|
*/
|
|
|
|
/** NimBLE differences highlighted in comment blocks **/
|
|
|
|
/*******original********
|
|
#include "BLEDevice.h"
|
|
***********************/
|
|
#include "NimBLEDevice.h"
|
|
|
|
extern "C"{void app_main(void);}
|
|
|
|
// The remote service we wish to connect to.
|
|
static BLEUUID serviceUUID("4fafc201-1fb5-459e-8fcc-c5c9c331914b");
|
|
// The characteristic of the remote service we are interested in.
|
|
static BLEUUID charUUID("beb5483e-36e1-4688-b7f5-ea07361b26a8");
|
|
|
|
static bool doConnect = false;
|
|
static bool connected = false;
|
|
static bool doScan = false;
|
|
static BLERemoteCharacteristic* pRemoteCharacteristic;
|
|
static BLEAdvertisedDevice* myDevice;
|
|
|
|
static void notifyCallback(
|
|
BLERemoteCharacteristic* pBLERemoteCharacteristic,
|
|
uint8_t* pData,
|
|
size_t length,
|
|
bool isNotify) {
|
|
printf("Notify callback for characteristic %s of data length %d data: %s\n",
|
|
pBLERemoteCharacteristic->getUUID().toString().c_str(),
|
|
length,
|
|
(char*)pData);
|
|
}
|
|
|
|
/** None of these are required as they will be handled by the library with defaults. **
|
|
** Remove as you see fit for your needs */
|
|
class MyClientCallback : public BLEClientCallbacks {
|
|
void onConnect(BLEClient* pclient) {
|
|
}
|
|
|
|
void onDisconnect(BLEClient* pclient) {
|
|
connected = false;
|
|
printf("onDisconnect");
|
|
}
|
|
/***************** New - Security handled here ********************
|
|
****** Note: these are the same return values as defaults ********/
|
|
uint32_t onPassKeyRequest(){
|
|
printf("Client PassKeyRequest\n");
|
|
return 123456;
|
|
}
|
|
bool onConfirmPIN(uint32_t pass_key){
|
|
printf("The passkey YES/NO number: %d\n", pass_key);
|
|
return true;
|
|
}
|
|
|
|
void onAuthenticationComplete(ble_gap_conn_desc desc){
|
|
printf("Starting BLE work!\n");
|
|
}
|
|
/*******************************************************************/
|
|
};
|
|
|
|
bool connectToServer() {
|
|
printf("Forming a connection to %s\n", myDevice->getAddress().toString().c_str());
|
|
|
|
BLEClient* pClient = BLEDevice::createClient();
|
|
printf(" - Created client\n");
|
|
|
|
pClient->setClientCallbacks(new MyClientCallback());
|
|
|
|
// Connect to the remove BLE Server.
|
|
pClient->connect(myDevice); // if you pass BLEAdvertisedDevice instead of address, it will be recognized type of peer device address (public or private)
|
|
printf(" - Connected to server\n");
|
|
|
|
// Obtain a reference to the service we are after in the remote BLE server.
|
|
BLERemoteService* pRemoteService = pClient->getService(serviceUUID);
|
|
if (pRemoteService == nullptr) {
|
|
printf("Failed to find our service UUID: %s\n", serviceUUID.toString().c_str());
|
|
pClient->disconnect();
|
|
return false;
|
|
}
|
|
printf(" - Found our service\n");
|
|
|
|
|
|
// Obtain a reference to the characteristic in the service of the remote BLE server.
|
|
pRemoteCharacteristic = pRemoteService->getCharacteristic(charUUID);
|
|
if (pRemoteCharacteristic == nullptr) {
|
|
printf("Failed to find our characteristic UUID: %s\n", charUUID.toString().c_str());
|
|
pClient->disconnect();
|
|
return false;
|
|
}
|
|
printf(" - Found our characteristic\n");
|
|
|
|
// Read the value of the characteristic.
|
|
if(pRemoteCharacteristic->canRead()) {
|
|
std::string value = pRemoteCharacteristic->readValue();
|
|
printf("The characteristic value was: %s\n", value.c_str());
|
|
}
|
|
/** registerForNotify() has been deprecated and replaced with subscribe() / unsubscribe().
|
|
* Subscribe parameter defaults are: notifications=true, notifyCallback=nullptr, response=false.
|
|
* Unsubscribe parameter defaults are: response=false.
|
|
*/
|
|
if(pRemoteCharacteristic->canNotify()) {
|
|
//pRemoteCharacteristic->registerForNotify(notifyCallback);
|
|
pRemoteCharacteristic->subscribe(true, notifyCallback);
|
|
}
|
|
|
|
connected = true;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Scan for BLE servers and find the first one that advertises the service we are looking for.
|
|
*/
|
|
class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
|
|
/**
|
|
* Called for each advertising BLE server.
|
|
*/
|
|
|
|
/*** Only a reference to the advertised device is passed now
|
|
void onResult(BLEAdvertisedDevice advertisedDevice) { **/
|
|
void onResult(BLEAdvertisedDevice* advertisedDevice) {
|
|
printf("BLE Advertised Device found: %s\n", advertisedDevice->toString().c_str());
|
|
|
|
// We have found a device, let us now see if it contains the service we are looking for.
|
|
/********************************************************************************
|
|
if (advertisedDevice.haveServiceUUID() && advertisedDevice.isAdvertisingService(serviceUUID)) {
|
|
********************************************************************************/
|
|
if (advertisedDevice->haveServiceUUID() && advertisedDevice->isAdvertisingService(serviceUUID)) {
|
|
|
|
BLEDevice::getScan()->stop();
|
|
/*******************************************************************
|
|
myDevice = new BLEAdvertisedDevice(advertisedDevice);
|
|
*******************************************************************/
|
|
myDevice = advertisedDevice; /** Just save the reference now, no need to copy the object */
|
|
doConnect = true;
|
|
doScan = true;
|
|
|
|
} // Found our server
|
|
} // onResult
|
|
}; // MyAdvertisedDeviceCallbacks
|
|
|
|
|
|
// This is the Arduino main loop function.
|
|
void connectTask (void * parameter){
|
|
for(;;) {
|
|
// If the flag "doConnect" is true then we have scanned for and found the desired
|
|
// BLE Server with which we wish to connect. Now we connect to it. Once we are
|
|
// connected we set the connected flag to be true.
|
|
if (doConnect == true) {
|
|
if (connectToServer()) {
|
|
printf("We are now connected to the BLE Server.\n");
|
|
} else {
|
|
printf("We have failed to connect to the server; there is nothin more we will do.\n");
|
|
}
|
|
doConnect = false;
|
|
}
|
|
|
|
// If we are connected to a peer BLE Server, update the characteristic each time we are reached
|
|
// with the current time since boot.
|
|
if (connected) {
|
|
char buf[256];
|
|
snprintf(buf, 256, "Time since boot: %lu", (unsigned long)(esp_timer_get_time() / 1000000ULL));
|
|
printf("Setting new characteristic value to %s\n", buf);
|
|
|
|
// Set the characteristic's value to be the array of bytes that is actually a string.
|
|
/*** Note: write value now returns true if successful, false otherwise - try again or disconnect ***/
|
|
pRemoteCharacteristic->writeValue((uint8_t*)buf, strlen(buf), false);
|
|
}else if(doScan){
|
|
BLEDevice::getScan()->start(0); // this is just eample to start scan after disconnect, most likely there is better way to do it in arduino
|
|
}
|
|
|
|
vTaskDelay(1000/portTICK_PERIOD_MS); // Delay a second between loops.
|
|
}
|
|
|
|
vTaskDelete(NULL);
|
|
} // End of loop
|
|
|
|
|
|
void app_main(void) {
|
|
printf("Starting BLE Client application...\n");
|
|
BLEDevice::init("");
|
|
|
|
// Retrieve a Scanner and set the callback we want to use to be informed when we
|
|
// have detected a new device. Specify that we want active scanning and start the
|
|
// scan to run for 5 seconds.
|
|
BLEScan* pBLEScan = BLEDevice::getScan();
|
|
pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
|
|
pBLEScan->setInterval(1349);
|
|
pBLEScan->setWindow(449);
|
|
pBLEScan->setActiveScan(true);
|
|
|
|
xTaskCreate(connectTask, "connectTask", 5000, NULL, 1, NULL);
|
|
pBLEScan->start(5, false);
|
|
} // End of setup.
|
|
|