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

218 lines
9.1 KiB
C++

/**
* NimBLE_Server Demo:
*
* Demonstrates many of the available features of the NimBLE server library.
*
* Created: on March 22 2020
* Author: H2zero
*/
#include <NimBLEDevice.h>
static NimBLEServer* pServer;
/** None of these are required as they will be handled by the library with defaults. **
** Remove as you see fit for your needs */
class ServerCallbacks : public NimBLEServerCallbacks {
void onConnect(NimBLEServer* pServer, NimBLEConnInfo& connInfo) override {
printf("Client address: %s\n", connInfo.getAddress().toString().c_str());
/**
* We can use the connection handle here to ask for different connection parameters.
* Args: connection handle, min connection interval, max connection interval
* latency, supervision timeout.
* Units; Min/Max Intervals: 1.25 millisecond increments.
* Latency: number of intervals allowed to skip.
* Timeout: 10 millisecond increments.
*/
pServer->updateConnParams(connInfo.getConnHandle(), 24, 48, 0, 18);
}
void onDisconnect(NimBLEServer* pServer, NimBLEConnInfo& connInfo, int reason) override {
printf("Client disconnected - start advertising\n");
NimBLEDevice::startAdvertising();
}
void onMTUChange(uint16_t MTU, NimBLEConnInfo& connInfo) override {
printf("MTU updated: %u for connection ID: %u\n", MTU, connInfo.getConnHandle());
}
/********************* Security handled here *********************/
uint32_t onPassKeyDisplay() override {
printf("Server Passkey Display\n");
/**
* This should return a random 6 digit number for security
* or make your own static passkey as done here.
*/
return 123456;
}
void onConfirmPassKey(NimBLEConnInfo& connInfo, uint32_t pass_key) override {
printf("The passkey YES/NO number: %" PRIu32 "\n", pass_key);
/** Inject false if passkeys don't match. */
NimBLEDevice::injectConfirmPasskey(connInfo, true);
}
void onAuthenticationComplete(NimBLEConnInfo& connInfo) override {
/** Check that encryption was successful, if not we disconnect the client */
if (!connInfo.isEncrypted()) {
NimBLEDevice::getServer()->disconnect(connInfo.getConnHandle());
printf("Encrypt connection failed - disconnecting client\n");
return;
}
printf("Secured connection to: %s\n", connInfo.getAddress().toString().c_str());
}
} serverCallbacks;
/** Handler class for characteristic actions */
class CharacteristicCallbacks : public NimBLECharacteristicCallbacks {
void onRead(NimBLECharacteristic* pCharacteristic, NimBLEConnInfo& connInfo) override {
printf("%s : onRead(), value: %s\n",
pCharacteristic->getUUID().toString().c_str(),
pCharacteristic->getValue().c_str());
}
void onWrite(NimBLECharacteristic* pCharacteristic, NimBLEConnInfo& connInfo) override {
printf("%s : onWrite(), value: %s\n",
pCharacteristic->getUUID().toString().c_str(),
pCharacteristic->getValue().c_str());
}
/**
* The value returned in code is the NimBLE host return code.
*/
void onStatus(NimBLECharacteristic* pCharacteristic, int code) override {
printf("Notification/Indication return code: %d, %s\n", code, NimBLEUtils::returnCodeToString(code));
}
/** Peer subscribed to notifications/indications */
void onSubscribe(NimBLECharacteristic* pCharacteristic, NimBLEConnInfo& connInfo, uint16_t subValue) override {
std::string str = "Client ID: ";
str += connInfo.getConnHandle();
str += " Address: ";
str += connInfo.getAddress().toString();
if (subValue == 0) {
str += " Unsubscribed to ";
} else if (subValue == 1) {
str += " Subscribed to notifications for ";
} else if (subValue == 2) {
str += " Subscribed to indications for ";
} else if (subValue == 3) {
str += " Subscribed to notifications and indications for ";
}
str += std::string(pCharacteristic->getUUID());
printf("%s\n", str.c_str());
}
} chrCallbacks;
/** Handler class for descriptor actions */
class DescriptorCallbacks : public NimBLEDescriptorCallbacks {
void onWrite(NimBLEDescriptor* pDescriptor, NimBLEConnInfo& connInfo) override {
std::string dscVal = pDescriptor->getValue();
printf("Descriptor written value: %s\n", dscVal.c_str());
}
void onRead(NimBLEDescriptor* pDescriptor, NimBLEConnInfo& connInfo) override {
printf("%s Descriptor read\n", pDescriptor->getUUID().toString().c_str());
}
} dscCallbacks;
extern "C" void app_main(void) {
printf("Starting NimBLE Server\n");
/** Initialize NimBLE and set the device name */
NimBLEDevice::init("NimBLE");
/**
* Set the IO capabilities of the device, each option will trigger a different pairing method.
* BLE_HS_IO_DISPLAY_ONLY - Passkey pairing
* BLE_HS_IO_DISPLAY_YESNO - Numeric comparison pairing
* BLE_HS_IO_NO_INPUT_OUTPUT - DEFAULT setting - just works pairing
*/
// NimBLEDevice::setSecurityIOCap(BLE_HS_IO_DISPLAY_ONLY); // use passkey
// NimBLEDevice::setSecurityIOCap(BLE_HS_IO_DISPLAY_YESNO); //use numeric comparison
/**
* 2 different ways to set security - both calls achieve the same result.
* no bonding, no man in the middle protection, BLE secure connections.
*
* These are the default values, only shown here for demonstration.
*/
// NimBLEDevice::setSecurityAuth(false, false, true);
NimBLEDevice::setSecurityAuth(/*BLE_SM_PAIR_AUTHREQ_BOND | BLE_SM_PAIR_AUTHREQ_MITM |*/ BLE_SM_PAIR_AUTHREQ_SC);
pServer = NimBLEDevice::createServer();
pServer->setCallbacks(&serverCallbacks);
NimBLEService* pDeadService = pServer->createService("DEAD");
NimBLECharacteristic* pBeefCharacteristic =
pDeadService->createCharacteristic("BEEF",
NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::WRITE |
/** Require a secure connection for read and write access */
NIMBLE_PROPERTY::READ_ENC | // only allow reading if paired / encrypted
NIMBLE_PROPERTY::WRITE_ENC // only allow writing if paired / encrypted
);
pBeefCharacteristic->setValue("Burger");
pBeefCharacteristic->setCallbacks(&chrCallbacks);
/**
* 2902 and 2904 descriptors are a special case, when createDescriptor is called with
* either of those uuid's it will create the associated class with the correct properties
* and sizes. However we must cast the returned reference to the correct type as the method
* only returns a pointer to the base NimBLEDescriptor class.
*/
NimBLE2904* pBeef2904 = pBeefCharacteristic->create2904();
pBeef2904->setFormat(NimBLE2904::FORMAT_UTF8);
pBeef2904->setCallbacks(&dscCallbacks);
NimBLEService* pBaadService = pServer->createService("BAAD");
NimBLECharacteristic* pFoodCharacteristic =
pBaadService->createCharacteristic("F00D", NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::WRITE | NIMBLE_PROPERTY::NOTIFY);
pFoodCharacteristic->setValue("Fries");
pFoodCharacteristic->setCallbacks(&chrCallbacks);
/** Custom descriptor: Arguments are UUID, Properties, max length of the value in bytes */
NimBLEDescriptor* pC01Ddsc =
pFoodCharacteristic->createDescriptor("C01D",
NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::WRITE | NIMBLE_PROPERTY::WRITE_ENC,
20);
pC01Ddsc->setValue("Send it back!");
pC01Ddsc->setCallbacks(&dscCallbacks);
/** Start the services when finished creating all Characteristics and Descriptors */
pDeadService->start();
pBaadService->start();
/** Create an advertising instance and add the services to the advertised data */
NimBLEAdvertising* pAdvertising = NimBLEDevice::getAdvertising();
pAdvertising->setName("NimBLE-Server");
pAdvertising->addServiceUUID(pDeadService->getUUID());
pAdvertising->addServiceUUID(pBaadService->getUUID());
/**
* If your device is battery powered you may consider setting scan response
* to false as it will extend battery life at the expense of less data sent.
*/
pAdvertising->enableScanResponse(true);
pAdvertising->start();
printf("Advertising Started\n");
/** Loop here and send notifications to connected peers */
for (;;) {
if (pServer->getConnectedCount()) {
NimBLEService* pSvc = pServer->getServiceByUUID("BAAD");
if (pSvc) {
NimBLECharacteristic* pChr = pSvc->getCharacteristic("F00D");
if (pChr) {
pChr->notify();
}
}
}
vTaskDelay(2000 / portTICK_PERIOD_MS);
}
}