mirror of
https://github.com/h2zero/esp-nimble-cpp.git
synced 2024-12-21 18:40:46 +01:00
218 lines
9.1 KiB
C++
218 lines
9.1 KiB
C++
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/**
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* NimBLE_Server Demo:
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*
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* Demonstrates many of the available features of the NimBLE server library.
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*
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* Created: on March 22 2020
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* Author: H2zero
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*/
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#include <NimBLEDevice.h>
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static NimBLEServer* pServer;
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/** None of these are required as they will be handled by the library with defaults. **
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** Remove as you see fit for your needs */
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class ServerCallbacks : public NimBLEServerCallbacks {
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void onConnect(NimBLEServer* pServer, NimBLEConnInfo& connInfo) override {
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printf("Client address: %s\n", connInfo.getAddress().toString().c_str());
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/**
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* We can use the connection handle here to ask for different connection parameters.
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* Args: connection handle, min connection interval, max connection interval
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* latency, supervision timeout.
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* Units; Min/Max Intervals: 1.25 millisecond increments.
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* Latency: number of intervals allowed to skip.
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* Timeout: 10 millisecond increments.
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*/
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pServer->updateConnParams(connInfo.getConnHandle(), 24, 48, 0, 18);
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}
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void onDisconnect(NimBLEServer* pServer, NimBLEConnInfo& connInfo, int reason) override {
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printf("Client disconnected - start advertising\n");
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NimBLEDevice::startAdvertising();
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}
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void onMTUChange(uint16_t MTU, NimBLEConnInfo& connInfo) override {
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printf("MTU updated: %u for connection ID: %u\n", MTU, connInfo.getConnHandle());
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}
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/********************* Security handled here *********************/
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uint32_t onPassKeyDisplay() override {
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printf("Server Passkey Display\n");
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/**
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* This should return a random 6 digit number for security
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* or make your own static passkey as done here.
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*/
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return 123456;
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}
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void onConfirmPassKey(NimBLEConnInfo& connInfo, uint32_t pass_key) override {
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printf("The passkey YES/NO number: %" PRIu32 "\n", pass_key);
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/** Inject false if passkeys don't match. */
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NimBLEDevice::injectConfirmPasskey(connInfo, true);
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}
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void onAuthenticationComplete(NimBLEConnInfo& connInfo) override {
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/** Check that encryption was successful, if not we disconnect the client */
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if (!connInfo.isEncrypted()) {
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NimBLEDevice::getServer()->disconnect(connInfo.getConnHandle());
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printf("Encrypt connection failed - disconnecting client\n");
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return;
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}
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printf("Secured connection to: %s\n", connInfo.getAddress().toString().c_str());
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}
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} serverCallbacks;
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/** Handler class for characteristic actions */
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class CharacteristicCallbacks : public NimBLECharacteristicCallbacks {
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void onRead(NimBLECharacteristic* pCharacteristic, NimBLEConnInfo& connInfo) override {
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printf("%s : onRead(), value: %s\n",
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pCharacteristic->getUUID().toString().c_str(),
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pCharacteristic->getValue().c_str());
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}
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void onWrite(NimBLECharacteristic* pCharacteristic, NimBLEConnInfo& connInfo) override {
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printf("%s : onWrite(), value: %s\n",
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pCharacteristic->getUUID().toString().c_str(),
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pCharacteristic->getValue().c_str());
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}
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/**
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* The value returned in code is the NimBLE host return code.
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*/
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void onStatus(NimBLECharacteristic* pCharacteristic, int code) override {
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printf("Notification/Indication return code: %d, %s\n", code, NimBLEUtils::returnCodeToString(code));
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}
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/** Peer subscribed to notifications/indications */
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void onSubscribe(NimBLECharacteristic* pCharacteristic, NimBLEConnInfo& connInfo, uint16_t subValue) override {
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std::string str = "Client ID: ";
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str += connInfo.getConnHandle();
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str += " Address: ";
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str += connInfo.getAddress().toString();
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if (subValue == 0) {
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str += " Unsubscribed to ";
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} else if (subValue == 1) {
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str += " Subscribed to notifications for ";
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} else if (subValue == 2) {
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str += " Subscribed to indications for ";
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} else if (subValue == 3) {
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str += " Subscribed to notifications and indications for ";
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}
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str += std::string(pCharacteristic->getUUID());
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printf("%s\n", str.c_str());
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}
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} chrCallbacks;
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/** Handler class for descriptor actions */
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class DescriptorCallbacks : public NimBLEDescriptorCallbacks {
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void onWrite(NimBLEDescriptor* pDescriptor, NimBLEConnInfo& connInfo) override {
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std::string dscVal = pDescriptor->getValue();
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printf("Descriptor written value: %s\n", dscVal.c_str());
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}
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void onRead(NimBLEDescriptor* pDescriptor, NimBLEConnInfo& connInfo) override {
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printf("%s Descriptor read\n", pDescriptor->getUUID().toString().c_str());
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}
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} dscCallbacks;
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extern "C" void app_main(void) {
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printf("Starting NimBLE Server\n");
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/** Initialize NimBLE and set the device name */
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NimBLEDevice::init("NimBLE");
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/**
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* Set the IO capabilities of the device, each option will trigger a different pairing method.
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* BLE_HS_IO_DISPLAY_ONLY - Passkey pairing
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* BLE_HS_IO_DISPLAY_YESNO - Numeric comparison pairing
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* BLE_HS_IO_NO_INPUT_OUTPUT - DEFAULT setting - just works pairing
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*/
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// NimBLEDevice::setSecurityIOCap(BLE_HS_IO_DISPLAY_ONLY); // use passkey
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// NimBLEDevice::setSecurityIOCap(BLE_HS_IO_DISPLAY_YESNO); //use numeric comparison
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/**
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* 2 different ways to set security - both calls achieve the same result.
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* no bonding, no man in the middle protection, BLE secure connections.
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*
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* These are the default values, only shown here for demonstration.
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*/
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// NimBLEDevice::setSecurityAuth(false, false, true);
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NimBLEDevice::setSecurityAuth(/*BLE_SM_PAIR_AUTHREQ_BOND | BLE_SM_PAIR_AUTHREQ_MITM |*/ BLE_SM_PAIR_AUTHREQ_SC);
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pServer = NimBLEDevice::createServer();
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pServer->setCallbacks(&serverCallbacks);
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NimBLEService* pDeadService = pServer->createService("DEAD");
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NimBLECharacteristic* pBeefCharacteristic =
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pDeadService->createCharacteristic("BEEF",
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NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::WRITE |
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/** Require a secure connection for read and write access */
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NIMBLE_PROPERTY::READ_ENC | // only allow reading if paired / encrypted
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NIMBLE_PROPERTY::WRITE_ENC // only allow writing if paired / encrypted
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);
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pBeefCharacteristic->setValue("Burger");
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pBeefCharacteristic->setCallbacks(&chrCallbacks);
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/**
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* 2902 and 2904 descriptors are a special case, when createDescriptor is called with
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* either of those uuid's it will create the associated class with the correct properties
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* and sizes. However we must cast the returned reference to the correct type as the method
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* only returns a pointer to the base NimBLEDescriptor class.
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*/
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NimBLE2904* pBeef2904 = pBeefCharacteristic->create2904();
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pBeef2904->setFormat(NimBLE2904::FORMAT_UTF8);
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pBeef2904->setCallbacks(&dscCallbacks);
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NimBLEService* pBaadService = pServer->createService("BAAD");
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NimBLECharacteristic* pFoodCharacteristic =
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pBaadService->createCharacteristic("F00D", NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::WRITE | NIMBLE_PROPERTY::NOTIFY);
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pFoodCharacteristic->setValue("Fries");
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pFoodCharacteristic->setCallbacks(&chrCallbacks);
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/** Custom descriptor: Arguments are UUID, Properties, max length of the value in bytes */
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NimBLEDescriptor* pC01Ddsc =
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pFoodCharacteristic->createDescriptor("C01D",
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NIMBLE_PROPERTY::READ | NIMBLE_PROPERTY::WRITE | NIMBLE_PROPERTY::WRITE_ENC,
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20);
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pC01Ddsc->setValue("Send it back!");
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pC01Ddsc->setCallbacks(&dscCallbacks);
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/** Start the services when finished creating all Characteristics and Descriptors */
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pDeadService->start();
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pBaadService->start();
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/** Create an advertising instance and add the services to the advertised data */
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NimBLEAdvertising* pAdvertising = NimBLEDevice::getAdvertising();
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pAdvertising->setName("NimBLE-Server");
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pAdvertising->addServiceUUID(pDeadService->getUUID());
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pAdvertising->addServiceUUID(pBaadService->getUUID());
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/**
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* If your device is battery powered you may consider setting scan response
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* to false as it will extend battery life at the expense of less data sent.
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*/
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pAdvertising->enableScanResponse(true);
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pAdvertising->start();
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printf("Advertising Started\n");
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/** Loop here and send notifications to connected peers */
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for (;;) {
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if (pServer->getConnectedCount()) {
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NimBLEService* pSvc = pServer->getServiceByUUID("BAAD");
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if (pSvc) {
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NimBLECharacteristic* pChr = pSvc->getCharacteristic("F00D");
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if (pChr) {
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pChr->notify();
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}
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}
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}
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vTaskDelay(2000 / portTICK_PERIOD_MS);
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}
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}
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