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esp-nimble-cpp/examples/NimBLE_Async_Client/main/main.cpp
2024-12-10 13:15:43 -07:00

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C++

/**
* NimBLE_Async_client Demo:
*
* Demonstrates asynchronous client operations.
*
* Created: on November 4, 2024
* Author: H2zero
*/
#include <NimBLEDevice.h>
static constexpr uint32_t scanTimeMs = 5 * 1000;
class ClientCallbacks : public NimBLEClientCallbacks {
void onConnect(NimBLEClient* pClient) override {
printf("Connected to: %s\n", pClient->getPeerAddress().toString().c_str());
}
void onDisconnect(NimBLEClient* pClient, int reason) override {
printf("%s Disconnected, reason = %d - Starting scan\n", pClient->getPeerAddress().toString().c_str(), reason);
NimBLEDevice::getScan()->start(scanTimeMs);
}
} clientCallbacks;
class ScanCallbacks : public NimBLEScanCallbacks {
void onResult(const NimBLEAdvertisedDevice* advertisedDevice) override {
printf("Advertised Device found: %s\n", advertisedDevice->toString().c_str());
if (advertisedDevice->haveName() && advertisedDevice->getName() == "NimBLE-Server") {
printf("Found Our Device\n");
/** Async connections can be made directly in the scan callbacks */
auto pClient = NimBLEDevice::getDisconnectedClient();
if (!pClient) {
pClient = NimBLEDevice::createClient(advertisedDevice->getAddress());
if (!pClient) {
printf("Failed to create client\n");
return;
}
}
pClient->setClientCallbacks(&clientCallbacks, false);
if (!pClient->connect(true, true, false)) { // delete attributes, async connect, no MTU exchange
NimBLEDevice::deleteClient(pClient);
printf("Failed to connect\n");
return;
}
}
}
void onScanEnd(const NimBLEScanResults& results, int reason) override {
printf("Scan Ended\n");
NimBLEDevice::getScan()->start(scanTimeMs);
}
} scanCallbacks;
extern "C" void app_main(void) {
printf("Starting NimBLE Async Client\n");
NimBLEDevice::init("Async-Client");
NimBLEDevice::setPower(3); /** +3db */
NimBLEScan* pScan = NimBLEDevice::getScan();
pScan->setScanCallbacks(&scanCallbacks);
pScan->setInterval(45);
pScan->setWindow(15);
pScan->setActiveScan(true);
pScan->start(scanTimeMs);
for (;;) {
vTaskDelay(pdMS_TO_TICKS(1000));
auto pClients = NimBLEDevice::getConnectedClients();
if (!pClients.size()) {
continue;
}
for (auto& pClient : pClients) {
printf("%s\n", pClient->toString().c_str());
NimBLEDevice::deleteClient(pClient);
}
NimBLEDevice::getScan()->start(scanTimeMs);
}
}