ESP32 Bluetooth Classic with Arduino IDE - Getting Started

The ESP32 comes with Wi-Fi, Bluetooth Low Energy and Bluetooth Classic. In this tutorial, you'll learn how to use ESP32 Bluetooth Classic with Arduino IDE to exchange data between an ESP32 and an Android smartphone.

We’ll control an ESP32 output, and send sensor readings to an Android smartphone using Bluetooth Classic.

Like my page on Facebook:
Follow me on twitter:

Subscribe for more projects like this!

[fredrik]

This was one of the best tutorials I have ever seen. So easy to follow, even if I used it for another thing it was so easy to understand how to do it.

[VMFRD]

Ótimo vídeo. Vc sabe se é possível proteger com senha a conexão Bluetooth?

[Graham]

Brilliant tutorial. I want to use the on board LED that I think is on GPIO2 but cannot get to turn it on or off using the message routine but if I test using digital write ON and OFF only (with a delay) such as BLINK - LED the led works! :(

[ChannelGuruMotekar]

Thanks for your tutorial, very helpful.

[Rundik]

Can I use that for transmitting audio to a bluetooth speaker?

[GuesstheSongChallenge]

This is very helpful. Thanks
Does your course cover proximity to the ESP32?
For example, if I'm holding my phone and walk closer or further away from the proximity of the ESP32 then it will let me know if I'm further or closer to it.

[amikhimji]

VERY NICE VIDEO GOOD EXPLANATION THANK YOU

[luisgoncalves]

Rui graças a ti não vou chumbar a Eletrónica Industrial.. amo-te!

[greenhelix]

Its perfect tutorial video!! I have a question sir!
Is it possible to extend bluetooth signal with esp32 from other bluetooth signal?

[angelchim]

Oh my bestofriendo thanks for the tutorial, you are awesome

[askiny]

The line
SerialBT.begin("ESP32test");
produces an error:
Task watchdog got triggered
The ESP32 refuses to to anything afterwards. What could be wrong?

[kumarjha]

Nice video. But I want to know how to acquire potentiometer data connected on ESP 32 (pin number 34) using the Laptop bluetooth. [I don't want to use android phone, I need data in laptop using its bluetooth]

[melvin-rhgr]

@Rui Santos : Can i restrict only 1 device can be connected to esp32

[meanamoto]

Sir? about the code, i want to do the temperature sensor only without LED.

if (SerialBT.available()){
char incomingChar = SerialBT.read();
if (incomingChar != '\n'){
message += String(incomingChar);
}
else{
message = "";
}
Serial.write(incomingChar);
}
// Check received message and control output accordingly
if (message =="led_on"){
digitalWrite(ledPin, HIGH);
}
else if (message =="led_off"){
digitalWrite(ledPin, LOW);
}
delay(20);

if I erased this code for LED?, temperature sensor will still work?

[partouelectric]

Hi Rui. This is Kazem. How can I setup another ESP32 Bluetooth classic receiver to communicate with the one you built

[youtotoube]

Nice ! One question i have been struggling with : how to make an ESP32 client that initiate a conection with an Android or a PC - i mean, with the ESP32 as client, so that you get an "ESP32 wants to connect" on the PC and click "yes" ?

[berkefekeskin]

i only see built in examples on arduino IDE, how can i download esp32 devkit v1 examples?

[thekiller]

i want to control ledstrip using bluetooth with my ios smartphone how do i do that

[MikaelMengistu]

I wasn't able to find the example in the Arduino web editor

[michaelkeandremusic]

im using a esp32 duino board i bought off temu works well with wifi but for some reason with bluetooth i keep getting a bunch of random symbols and question marks in the monitor window. any reason why?