For now we will not look into that value, but for a robust code you should always include error checks. This method receives as input a string with the name we want to assign to the device, which will be seen by other Bluetooth enabled devices that will discover it.Īs output, it returns a Boolean value indicating if the initialization was successful or not. To do so, we simply need to call the begin method of the BluetoothSerial object, which will handle all of the lower level initialization for us. Now that we have our Bluetooth object, we need to initialize the Bluetooth stack, so other devices can see our ESP32 and pair with it, before initializing the serial communication. Under the hood, this class makes use of IDF’s Bluetooth classic API, which we have been covering in previous posts. You can check the implementation file for this class here. Next we will need an object of class BluetoothSerial, which is the one we will use to initialize the Bluetooth stack on the ESP32 and to send the data. The first thing we need to do is including the BluetoothSerial.h library, which will expose the functionalities needed to work with serial over Bluetooth. If you prefer, you can check the video tutorial at my Youtube channel. The tests of this ESP32 tutorial were performed using a DFRobot’s ESP-WROOM-32 device integrated in a ESP32 FireBeetle board. Note that the example provided here is based on the library example available on the Arduino core, which I encourage you to try. In terms of API, it will be very similar to the regular Serial communication functions we use on the Arduino environment. One important thing to mentioned is that this is a very high level library that will hide from us most of the Bluetooth implementation details, which is why the code we are going to develop is very simple and small. So, you may need to update to the latest version of the Arduino core. The objective of this post is to explain how to get started with the BluetoothSerial ESP32 library, in order to send data to a emulated Serial connection, operating over Bluetooth classic.Īt the time of writing, the mentioned library had just been added to the ESP32 Arduino core. Memes and other low effort jokes are not acceptable forms of content.The objective of this post is to explain how to get started with the BluetoothSerial ESP32 library, in order to send data to a emulated Serial connection, operating over Bluetooth classic. Please keep submissions on topic and of high quality.Ĭivility & Respect are expected. It is a successor to the ESP8266 microcontroller. The ESP32 series of chips is created and developed by Espressif Systems and is manufactured by TSMC using their 40 nm process. It and includes in-built antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power management modules as well. The ESP32 series employs either a Tensilica Xtensa LX6, Xtensa LX7 or a RiscV processor, and both dual-core and single-core variations are available. ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth.
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