Petoi Doc Center
🇺🇸English
🇺🇸English
  • Welcome to Petoi Doc Center
  • Getting Started Guide
  • 🙋‍♂️FAQ(Frequently Asked Questions)
  • Petoi robot joint index
    • Joint Pins on NyBoard
      • Nybble
      • Bittle
    • Joint Pins on BiBoard V0
      • Bittle X
      • Bittle X+Arm
    • Joint Pins on BiBoard V1
      • Bittle X
      • Bittle X+Arm
      • Nybble Q
  • Bluetooth Connection
    • BiBoard
    • NyBoard
  • Upload Firmware
    • NyBoard
    • BiBoard V0
    • BiBoard V1
  • Joint Calibration
  • Infrared Remote
    • Remote Controller
  • Mobile App
    • Introduction
    • Calibrator
      • Nybble
      • Bittle
    • Controller
  • Desktop APP
    • Introduction
    • Firmware Uploader
      • NyBoard
      • BiBoard V0
      • BiBoard V1
    • Joint Calibrator
      • NyBoard Preparation
      • BiBoard Preparation
      • Nybble
      • Bittle / Bittle X
        • Bittle (NyBoard)
        • Bittle X (BiBoard V0)
        • Bittle X (BiBoard V1)
      • Bittle X+Arm
        • BiBoard V1
        • BiBoard V0
    • Skill Composer
      • NyBoard Connection
      • BiBoard Connection
      • Interface
        • Nybble
        • Bittle / Bittle X
        • Bittle X+Arm
    • Tools
  • Block-based programming
    • Petoi Coding Blocks
      • NyBoard Preparation
      • BiBoard Preparation
    • Block-based Coding Curriculum - Learn Quadruped Robotics for Beginners
    • Python coding mode in Mind+
    • Generic Arduino Uno Blocks
    • Install Mind+ on Chromebook
  • Arduino IDE
    • Upload Sketch for NyBoard
    • Upload Sketch for BiBoard
    • Calibrate the joints with Arduino IDE
    • Serial Monitor
    • C++ Curriculum: Learn Quadruped Robotics for Beginners
    • Install Arduino IDE on Chromebook
  • Free Curriculum
    • 📚Download
  • APIs
    • 🖇️Serial Protocol
      • Feedback servos
      • Nested task queue and signal generator
    • 🐍Python API
    • 🐛8266 MicroPython controller
      • Run MicroPython on ESP8266
      • Setup WebREPL
      • Using the ESP-NOW protocol
    • 🦎8266 Arduino C Controller
    • ©️C++ API
    • 🍓Raspberry Pi serial port as an interface
      • For BiBoard V1
    • 💻Set up Development Environment on Chromebook
    • 🤖ROS
  • Nyboard
    • Overview
    • NyBoard V1_0
    • NyBoard V1_1 & NyBoard V1_2
  • BIBOARD
    • BiBoard V0 Guide
    • BiBoard Extension Hat
    • Demo Applications
      • 1.GPIO port
      • 2.Serial port
      • 3.Analog-digital converter
      • 4.Digital-Analog Converter
      • 5.EEPROM (Electrically Erasable Programmable read only memory)
      • 6.Gyro IMU(MPU6050)
      • 7.Infrared remote control
      • 8.PWM(Pulse Width Modulation)
      • 9.Servo(under construction)
      • 10.Classic Bluetooth serial port SPP
      • 11.Bluetooth low energy (BLE) serial port pass-through
      • 12.File system SPIFFS
      • 13.Add hardware partition configuration option in Arduino IDE
      • 14.Play MP3
      • 15.The usage of Wi-Fi OTA(Over-The-Air)
    • BiBoard V1 Guide
  • Communication Modules
    • Introduction (For NyBoard)
    • USB Uploader (CH340C or CH343G)
    • Dual Mode Bluetooth
    • WiFi module ESP8266
      • ESP8266 + Python Scripts Implement wireless crowd control
  • Extensible Modules
    • Introduction
    • MU Camera
    • Ultrasonic Sensor
    • Light Sensor
    • Touch Sensor
    • Gesture Sensor
    • PIR Motion Sensor
    • IR Distance Sensor
    • Voice Command Module
    • Petoi AI Vision Module
    • Advanced development and application of AI vision modules
      • Model Training
      • Model quantification
      • Model deployment
      • Training on the COCO DIY dataset
    • Robot Arm
      • Upgrade your older Bittle/Bittle X for the robotics arm gripper
    • 🎮Joystick with Micro:Bit
  • Applications
    • Melody Creation
    • Skill Creation
    • OpenCat Imitation Tutorial
    • Programmable Puppet Character
    • Tutorial for simulating Bittle In Isaac Sim
  • History
    • Upload Sketch For NyBoard (software 1.0)
  • Technical Support
    • 💾Supporting Application and Software
    • 🔧Burn Bootloader for NyBoard
    • 🛠️Useful Tools
    • 🔋Battery
  • Useful Links 🕸
    • 🔭Home of Petoi Robots
    • 🛒Shop Coding Robots
    • 💿GitHub of OpenCat
    • 🎪PetoiCamp (Forum)
    • 📽️Petoi Robot Videos
    • 📬Users' repositories
Powered by GitBook
On this page
  • 1. Bluetooth protocol
  • 2. Classic Bluetooth serial port (SPP)

Was this helpful?

Export as PDF
  1. BIBOARD
  2. Demo Applications

10.Classic Bluetooth serial port SPP

The sample code mainly demonstrates the mutual forwarding of information between the Bluetooth serial port and the serial port, which is derived from the official demo of ESP32, which is simple and easy to understand. So the description mainly explains the concepts that appear in the code.

1. Bluetooth protocol

At present, the main Bluetooth protocols are divided into two categories, traditional Bluetooth (HS/BR/EDR) based on RFCOMM and Bluetooth low energy (BLE) based on GATT.

Traditional Bluetooth is faster and has many specific application protocols, such as audio-oriented A2DP, Bluetooth serial port SPP, etc. However, the power consumption is high, and access to Apple devices requires MFi (Made For iOS) chips and certification.

Bluetooth Low Energy (BLE) can define various GATT profiles by itself, and it is also equipped with commonly used profiles (such as device information, battery, etc.). It has low power consumption and is widely used. It can be used on Apple devices. The disadvantages is that it is slower than traditional Bluetooth. Bluetooth low energy is mostly used on devices with low data volume but sensitive to power consumption, such as bracelets/smart watches/beacons.

2. Classic Bluetooth serial port (SPP)

This demo uses the SPP protocol based on traditional Bluetooth, which comes with all serial port protocols. When the computer or Android phone is connected and paired, a serial port number will be automatically generated in the system for communication, and the experience is not much different from that of a normal wired serial port.

//This example code is in the Public Domain (or CC0 licensed, at your option.)
//By Evandro Copercini - 2018
//
//This example creates a bridge between Serial and Classical Bluetooth (SPP)
//and also demonstrate that SerialBT have the same functionalities of a normal Serial

#include "BluetoothSerial.h"

#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
#endif

BluetoothSerial SerialBT;

void setup() {
  Serial.begin(115200);
  SerialBT.begin("BTSPP_Test");          //Bluetooth device name
  Serial.println("The device started,");
  Serial.println("Now you can pair it with bluetooth!");
}

void loop() {
  if (Serial.available()) {
    SerialBT.write(Serial.read());
  }
  if (SerialBT.available()) {
    Serial.write(SerialBT.read());
  }
  delay(20);
}

The bluetooth low energy serial port will be demonstrated in the next chapter. In essence, it is a profile configured with a serial port and requires host software support.

Previous9.Servo(under construction)Next11.Bluetooth low energy (BLE) serial port pass-through

Last updated 3 years ago

Was this helpful?