65 lines
2.0 KiB
Arduino
65 lines
2.0 KiB
Arduino
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/*
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Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleWrite.cpp
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Ported to Arduino ESP32 by Evandro Copercini
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*/
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#include <BLEDevice.h>
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#include <BLEUtils.h>
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#include <BLEServer.h>
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// See the following for generating UUIDs:
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// https://www.uuidgenerator.net/
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#define SERVICE_UUID "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
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#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"
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class MyCallbacks: public BLECharacteristicCallbacks {
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void onWrite(BLECharacteristic *pCharacteristic) {
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std::string value = pCharacteristic->getValue();
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if (value.length() > 0) {
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Serial.println("*********");
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Serial.print("New value: ");
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for (int i = 0; i < value.length(); i++)
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Serial.print(value[i]);
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Serial.println();
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Serial.println("*********");
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}
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}
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};
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void setup() {
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Serial.begin(115200);
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Serial.println("1- Download and install an BLE scanner app in your phone");
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Serial.println("2- Scan for BLE devices in the app");
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Serial.println("3- Connect to MyESP32");
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Serial.println("4- Go to CUSTOM CHARACTERISTIC in CUSTOM SERVICE and write something");
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Serial.println("5- See the magic =)");
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BLEDevice::init("MyESP32");
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BLEServer *pServer = BLEDevice::createServer();
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BLEService *pService = pServer->createService(SERVICE_UUID);
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BLECharacteristic *pCharacteristic = pService->createCharacteristic(
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CHARACTERISTIC_UUID,
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BLECharacteristic::PROPERTY_READ |
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BLECharacteristic::PROPERTY_WRITE
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);
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pCharacteristic->setCallbacks(new MyCallbacks());
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pCharacteristic->setValue("Hello World");
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pService->start();
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BLEAdvertising *pAdvertising = pServer->getAdvertising();
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pAdvertising->start();
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}
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void loop() {
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// put your main code here, to run repeatedly:
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delay(2000);
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}
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