mirror of
https://github.com/h2zero/esp-nimble-cpp.git
synced 2024-11-25 06:30:55 +01:00
229 lines
9.6 KiB
C++
229 lines
9.6 KiB
C++
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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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*/
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#include "NimBLEDevice.h"
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#include "NimBLELog.h"
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#include <stdio.h>
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extern "C" {void app_main(void);}
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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) {
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printf("Client connected\n");
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NimBLEDevice::startAdvertising();
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};
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/** Alternative onConnect() method to extract details of the connection.
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* See: src/ble_gap.h for the details of the ble_gap_conn_desc struct.
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*/
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void onConnect(NimBLEServer* pServer, ble_gap_conn_desc* desc) {
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printf("Client address: %s\n", NimBLEAddress(desc->peer_ota_addr).toString().c_str());
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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, try for 3x interval time for best results.
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*/
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pServer->updateConnParams(desc->conn_handle, 24, 48, 0, 18);
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};
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void onDisconnect(NimBLEServer* pServer) {
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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, ble_gap_conn_desc* desc) {
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printf("MTU updated: %u for connection ID: %u\n", MTU, desc->conn_handle);
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};
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/********************* Security handled here **********************
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****** Note: these are the same return values as defaults ********/
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uint32_t onPassKeyRequest(){
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printf("Server Passkey Request\n");
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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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bool onConfirmPIN(uint32_t pass_key){
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printf("The passkey YES/NO number: %d\n", pass_key);
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/** Return false if passkeys don't match. */
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return true;
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};
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void onAuthenticationComplete(ble_gap_conn_desc* desc){
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/** Check that encryption was successful, if not we disconnect the client */
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if(!desc->sec_state.encrypted) {
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/** NOTE: createServer returns the current server reference unless one is not already created */
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NimBLEDevice::createServer()->disconnect(desc->conn_handle);
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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("Starting BLE work!");
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};
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};
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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){
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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) {
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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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/** Called before notification or indication is sent,
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* the value can be changed here before sending if desired.
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*/
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void onNotify(NimBLECharacteristic* pCharacteristic) {
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printf("Sending notification to clients\n");
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};
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/** The status returned in status is defined in NimBLECharacteristic.h.
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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, Status status, int code) {
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printf("Notification/Indication status code: %d , return code: %d, %s\n",
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status,
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code,
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NimBLEUtils::returnCodeToString(code));
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};
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};
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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) {
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std::string dscVal((char*)pDescriptor->getValue(), pDescriptor->getLength());
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printf("Descriptor witten value: %s\n", dscVal.c_str());
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};
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void onRead(NimBLEDescriptor* pDescriptor) {
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printf("%s Descriptor read\n", pDescriptor->getUUID().toString().c_str());
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};;
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};
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/** Define callback instances globally to use for multiple Charateristics \ Descriptors */
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static DescriptorCallbacks dscCallbacks;
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static CharacteristicCallbacks chrCallbacks;
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void notifyTask(void * parameter){
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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(true);
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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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vTaskDelete(NULL);
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}
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void app_main(void) {
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printf("Starting NimBLE Server\n");
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/** sets device name */
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NimBLEDevice::init("NimBLE");
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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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/** 2 different ways to set security - both calls achieve the same result.
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* no bonding, no man in the middle protection, 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(new ServerCallbacks());
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NimBLEService* pDeadService = pServer->createService("DEAD");
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NimBLECharacteristic* pBeefCharacteristic = pDeadService->createCharacteristic(
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"BEEF",
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NIMBLE_PROPERTY::READ |
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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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/** 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 = (NimBLE2904*)pBeefCharacteristic->createDescriptor("2904");
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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 = pBaadService->createCharacteristic(
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"F00D",
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NIMBLE_PROPERTY::READ |
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NIMBLE_PROPERTY::WRITE |
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NIMBLE_PROPERTY::NOTIFY
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);
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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 in bytes of the value */
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NimBLEDescriptor* pC01Ddsc = pFoodCharacteristic->createDescriptor(
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"C01D",
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NIMBLE_PROPERTY::READ |
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NIMBLE_PROPERTY::WRITE|
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NIMBLE_PROPERTY::WRITE_ENC, // only allow writing if paired / encrypted
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20
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);
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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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NimBLEAdvertising* pAdvertising = NimBLEDevice::getAdvertising();
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/** Add the services to the advertisment data **/
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pAdvertising->addServiceUUID(pDeadService->getUUID());
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pAdvertising->addServiceUUID(pBaadService->getUUID());
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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->setScanResponse(true);
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pAdvertising->start();
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printf("Advertising Started\n");
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xTaskCreate(notifyTask, "notifyTask", 5000, NULL, 1, NULL);
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}
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