B4R Question ESP32 serial comunication with bluetooth

[Humberto]

Can I communicate with cellphone through bluetooth with ESP32 ?

It´s already implemented ?

Thanks

 

[Erel]

There is currently no support for the built-in Bluetooth. I'm not sure that it is supported by the underlying ESP32 / Arduino framework. Last time I checked it was not supported.

 

[Humberto]

In arduino IDE version 1.85 there ae examples of BLE as a cliente, server

Bellow is a server example

/*
    Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleServer.cpp
    Ported to Arduino ESP32 by Evandro Copercini
*/

#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>

// See the following for generating UUIDs:
// https://www.uuidgenerator.net/

#define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"

void setup() {
  Serial.begin(115200);
  Serial.println("Starting BLE work!");

  BLEDevice::init("MyESP32");
  BLEServer *pServer = BLEDevice::createServer();
  BLEService *pService = pServer->createService(SERVICE_UUID);
  BLECharacteristic *pCharacteristic = pService->createCharacteristic(
                                         CHARACTERISTIC_UUID,
                                         BLECharacteristic::PROPERTY_READ |
                                         BLECharacteristic::PROPERTY_WRITE
                                       );

  pCharacteristic->setValue("Hello World says Neil");
  pService->start();
  BLEAdvertising *pAdvertising = pServer->getAdvertising();
  pAdvertising->start();
  Serial.println("Characteristic defined! Now you can read it in your phone!");
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(2000);
}

 

[tigrot]

You could wrap the library or write a few C code lines to use the new capability.

 

[Humberto]

I don´t know how to do it.

 

[tigrot]

Look at examples for inline c coding. I have not esp32 to test. Sorry. The samples for ble could be a good start point. All you need is a write routine and read routine which generates an event for incoming data.

 

[mterveen]

ble is available, classic bluetooth is not.