### Install Documentation and License Files

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/CMakeLists.txt

Installs documentation, license, and readme files to the share directory of the installation prefix. Also installs a startup script on non-Windows systems.

```cmake
install(DIRECTORY cmake/ DESTINATION ${CMAKE_INSTALL_PREFIX}/share/${PROJECT_PKG_NAME})
install(FILES LICENSE.txt README.md DESTINATION ${CMAKE_INSTALL_PREFIX}/share/${PROJECT_PKG_NAME}/)
install(DIRECTORY doc DESTINATION ${CMAKE_INSTALL_PREFIX}/share/${PROJECT_PKG_NAME})
IF (WIN32)
ELSE()
INSTALL(PROGRAMS startup/initenv.sh DESTINATION startup)
ENDIF()
```

--------------------------------

### CYdLidar Class - C++ Example

Source: https://context7.com/ydlidar/ydlidar-sdk/llms.txt

This example demonstrates how to use the CYdLidar class to initialize, configure, and start scanning with a YDLIDAR sensor. It covers setting serial port, baud rate, lidar type, sample rate, and other essential parameters. The code also includes a loop for processing incoming scan data.

```APIDOC
## CYdLidar Class - C++ Example

### Description
This example demonstrates the basic usage of the `CYdLidar` class for initializing, configuring, and acquiring scan data from a YDLIDAR sensor using C++.

### Method
C++ Example

### Endpoint
N/A (Local SDK usage)

### Parameters
N/A (Configuration is done via `setlidaropt` method)

### Request Example
```cpp
#include "CYdLidar.h"
#include <iostream>

using namespace ydlidar;

int main() {
    // Initialize system signal handling for graceful shutdown
    ydlidar::os_init();

    // Create LiDAR instance
    CYdLidar laser;

    // Configure string properties
    std::string port = "/dev/ttyUSB0";
    laser.setlidaropt(LidarPropSerialPort, port.c_str(), port.size());

    // Configure integer properties
    int baudrate = 230400;
    laser.setlidaropt(LidarPropSerialBaudrate, &baudrate, sizeof(int));
    int lidarType = TYPE_TRIANGLE;  // or TYPE_TOF for TOF lidars
    laser.setlidaropt(LidarPropLidarType, &lidarType, sizeof(int));
    int deviceType = YDLIDAR_TYPE_SERIAL;
    laser.setlidaropt(LidarPropDeviceType, &deviceType, sizeof(int));
    int sampleRate = 9;  // KHz
    laser.setlidaropt(LidarPropSampleRate, &sampleRate, sizeof(int));

    // Configure boolean properties
    bool autoReconnect = true;
    laser.setlidaropt(LidarPropAutoReconnect, &autoReconnect, sizeof(bool));
    bool singleChannel = false;
    laser.setlidaropt(LidarPropSingleChannel, &singleChannel, sizeof(bool));
    bool intensity = false;
    laser.setlidaropt(LidarPropIntenstiy, &intensity, sizeof(bool));

    // Configure float properties (angles in degrees, range in meters)
    float maxAngle = 180.0f;
    laser.setlidaropt(LidarPropMaxAngle, &maxAngle, sizeof(float));
    float minAngle = -180.0f;
    laser.setlidaropt(LidarPropMinAngle, &minAngle, sizeof(float));
    float maxRange = 16.0f;
    laser.setlidaropt(LidarPropMaxRange, &maxRange, sizeof(float));
    float minRange = 0.1f;
    laser.setlidaropt(LidarPropMinRange, &minRange, sizeof(float));
    float scanFrequency = 10.0f;  // Hz
    laser.setlidaropt(LidarPropScanFrequency, &scanFrequency, sizeof(float));

    // Initialize and start scanning
    if (!laser.initialize()) {
        std::cerr << "Failed to initialize: " << laser.DescribeError() << std::endl;
        return -1;
    }

    if (!laser.turnOn()) {
        std::cerr << "Failed to start: " << laser.DescribeError() << std::endl;
        return -1;
    }

    // Main scanning loop
    LaserScan scan;
    while (ydlidar::os_isOk()) {
        if (laser.doProcessSimple(scan)) {
            std::cout << "Received " << scan.points.size() << " points at "
                      << scan.scanFreq << " Hz" << std::endl;

            // Process individual points
            for (const auto& point : scan.points) {
                float angle_deg = point.angle * 180.0 / M_PI;
                float range_m = point.range;
                float intensity_val = point.intensity;
                // Use point data...
            }
        }
    }

    // Cleanup
    laser.turnOff();
    laser.disconnecting();

    return 0;
}
```

### Response
N/A (This is a client-side SDK example)

#### Success Response (200)
N/A

#### Response Example
N/A
```

--------------------------------

### Build and Install YDLIDAR SDK (Static Library)

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/YDLIDAR_SDK_API_for_Developers.md

Instructions to build and install the YDLIDAR SDK as a static library using CMake and Make. This involves navigating to the build directory, configuring the build, compiling, and installing.

```shell
$cd YDLidar-SDK/build
$cmake ../
$make
$sudo make install
```

--------------------------------

### ROS Integration Example

Source: https://context7.com/ydlidar/ydlidar-sdk/llms.txt

This example demonstrates how to convert YDLidar's `LaserScan` data into ROS `sensor_msgs::LaserScan` for seamless integration with ROS.

```APIDOC
## ROS Integration Example

### Description
This C++ code snippet shows how to convert the `LaserScan` data obtained from the YDLidar SDK into the ROS `sensor_msgs::LaserScan` message format. This allows you to publish LiDAR data within a ROS ecosystem.

### Method
C++ with ROS

### Endpoint
N/A (This is a ROS node example)

### Parameters
N/A

### Request Body
N/A

### Request Example
```cpp
#include "CYdLidar.h"
#include <ros/ros.h>
#include <sensor_msgs/LaserScan.h>

// Convert YDLidar LaserScan to ROS sensor_msgs::LaserScan
void publishScan(ros::Publisher& pub, const LaserScan& scan,
                 const std::string& frame_id) {
    sensor_msgs::LaserScan scan_msg;

    // Set timestamp from YDLidar nanosecond timestamp
    scan_msg.header.stamp.sec = scan.stamp / 1000000000ul;
    scan_msg.header.stamp.nsec = scan.stamp % 1000000000ul;
    scan_msg.header.frame_id = frame_id;

    // Set scan parameters from config
    scan_msg.angle_min = scan.config.min_angle;
    scan_msg.angle_max = scan.config.max_angle;
    scan_msg.angle_increment = scan.config.angle_increment;
    scan_msg.scan_time = scan.config.scan_time;
    scan_msg.time_increment = scan.config.time_increment;
    scan_msg.range_min = scan.config.min_range;
    scan_msg.range_max = scan.config.max_range;

    // Calculate array size
    int size = (scan.config.max_angle - scan.config.min_angle) /
               scan.config.angle_increment + 1;
    scan_msg.ranges.resize(size, std::numeric_limits<float>::infinity());
    scan_msg.intensities.resize(size, 0);

    // Fill in range and intensity data
    for (size_t i = 0; i < scan.points.size(); i++) {
        int index = std::ceil((scan.points[i].angle - scan.config.min_angle) /
                              scan.config.angle_increment);
        if (index >= 0 && index < size) {
            scan_msg.ranges[index] = scan.points[i].range;
            scan_msg.intensities[index] = scan.points[i].intensity;
        }
    }

    pub.publish(scan_msg);
}

int main(int argc, char** argv) {
    ros::init(argc, argv, "ydlidar_node");
    ros::NodeHandle nh;

    ros::Publisher scan_pub = nh.advertise<sensor_msgs::LaserScan>("/scan", 10);

    ydlidar::os_init();
    CYdLidar laser;

    // Configure LiDAR (use ROS parameters in real implementation)
    std::string port = "/dev/ttyUSB0";
    laser.setlidaropt(LidarPropSerialPort, port.c_str(), port.size());
    // ... additional configuration ...

    if (laser.initialize() && laser.turnOn()) {
        LaserScan scan;
        ros::Rate rate(20);

        while (ros::ok() && ydlidar::os_isOk()) {
            if (laser.doProcessSimple(scan)) {
                publishScan(scan_pub, scan, "laser_frame");
            }
            ros::spinOnce();
            rate.sleep();
        }
        laser.turnOff();
    }
    laser.disconnecting();

    return 0;
}
```

### Response
N/A

### Response Example
N/A
```

--------------------------------

### Install YDLidar-SDK Python API

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/howto/how_to_build_and_install.md

Installs the Python API for the YDLidar SDK using pip or by building and installing from the source code.

```shell
cd YDLidar-SDK
pip install .
python setup.py build
python setup.py install
```

--------------------------------

### Build YDLIDAR SDK Source with Examples Disabled

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/YDLIDAR_SDK_API_for_Developers.md

Command to build the YDLIDAR SDK from source while disabling the generation of example executables. This is useful for reducing build time or if examples are not needed.

```shell
$cmake -DBUILD_EXAMPLES=OFF ../ && make
```

--------------------------------

### POST /lidar/initialize

Source: https://context7.com/ydlidar/ydlidar-sdk/llms.txt

Initializes the LiDAR sensor and starts the scanning process.

```APIDOC
## POST /lidar/initialize

### Description
Initializes the hardware connection and starts the motor/laser scanning process.

### Method
POST

### Endpoint
/lidar/initialize

### Parameters
None

### Request Example
{}

### Response
#### Success Response (200)
- **status** (boolean) - Returns true if initialization and start were successful.

#### Response Example
{
  "status": true
}
```

--------------------------------

### Install CMake and Dependencies on Ubuntu

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/howto/how_to_build_and_install.md

Installs CMake, pkg-config, and optionally Python and SWIG for using the Python API on Ubuntu systems using apt.

```shell
sudo apt install cmake pkg-config
sudo apt-get install python swig
sudo apt-get install python-pip
```

--------------------------------

### Method 1: Link against installed YDLidar SDK

Source: https://context7.com/ydlidar/ydlidar-sdk/llms.txt

This method demonstrates how to link your CMake project against an already installed YDLidar SDK.

```APIDOC
## Link against installed YDLidar SDK

### Description
This CMake configuration finds the installed YDLidar SDK, includes its headers, and links your executable against its libraries.

### Method
CMake build system

### Endpoint
N/A

### Parameters
N/A

### Request Body
N/A

### Request Example
```cmake
cmake_minimum_required(VERSION 2.8)
project(my_lidar_project)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

# Find installed YDLidar SDK
find_package(ydlidar_sdk REQUIRED)

# Include directories
include_directories(${YDLIDAR_SDK_INCLUDE_DIRS})

# Link directories
link_directories(${YDLIDAR_SDK_LIBRARY_DIRS})

# Create executable
add_executable(my_lidar_app main.cpp)

# Link to SDK
target_link_libraries(my_lidar_app ${YDLIDAR_SDK_LIBRARIES})
```

### Response
N/A

### Response Example
N/A
```

--------------------------------

### Install YDLIDAR SDK Package

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/CMakeLists.txt

Configures the installation of the YDLIDAR SDK, including headers, generated headers, and libraries. It sets up the package name, version, and destination directories.

```cmake
string(TOUPPER ${PROJECT_NAME} PROJECT_PKG_NAME)
install_package(
    PKG_NAME ${PROJECT_PKG_NAME}
    LIB_NAME ${PROJECT_NAME}
    VERSION ${YDLIDAR_SDK_VERSION}
    INSTALL_HEADERS ${SDK_HEADERS}
    INSTALL_GENERATED_HEADERS ${GENERATED_HEADERS}
    DESTINATION ${CMAKE_INSTALL_PREFIX}/include
    INCLUDE_DIRS ${SDK_INCS}
    LINK_LIBS ${SDK_LIBS}
    )
```

--------------------------------

### Initialize YDLIDAR SDK and Device

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_tutorial_c++.md

Initializes the system signal handler, creates a CYdLidar instance, and performs the initial device connection and setup.

```c++
#include "CYdLidar.h"
ydlidar::os_init();
CYdLidar laser;
bool ret = laser.initialize();
```

--------------------------------

### Implement LiDAR Data Acquisition in C++

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_tutorial_c++.md

A complete C++ example demonstrating how to configure LiDAR properties, initialize the device, and enter a loop to process incoming scan data.

```cpp
#include "CYdLidar.h"
#include <string>
using namespace std;
using namespace ydlidar;

#if defined(_MSC_VER)
#pragma comment(lib, "ydlidar_sdk.lib")
#endif

int main(int argc, char *argv[]) {
  ydlidar::os_init();
  CYdLidar laser;
  std::map<std::string, std::string> ports = ydlidar::lidarPortList();
  std::string port = "/dev/ydlidar";
  if(!ports.empty()) {
      port = ports.begin()->second;
  }
  laser.setlidaropt(LidarPropSerialPort, port.c_str(), port.size());
  std::string ignore_array;
  ignore_array.clear();
  laser.setlidaropt(LidarPropIgnoreArray, ignore_array.c_str(), ignore_array.size());
  int optval = 230400;
  laser.setlidaropt(LidarPropSerialBaudrate, &optval, sizeof(int));
  optval = TYPE_TRIANGLE;
  laser.setlidaropt(LidarPropLidarType, &optval, sizeof(int));
  optval = YDLIDAR_TYPE_SERIAL;
  laser.setlidaropt(LidarPropDeviceType, &optval, sizeof(int));
  optval = 9;
  laser.setlidaropt(LidarPropSampleRate, &optval, sizeof(int));
  optval = 4;
  laser.setlidaropt(LidarPropAbnormalCheckCount, &optval, sizeof(int));
  bool b_optvalue = false;
  laser.setlidaropt(LidarPropFixedResolution, &b_optvalue, sizeof(bool));
  laser.setlidaropt(LidarPropReversion, &b_optvalue, sizeof(bool));
  laser.setlidaropt(LidarPropInverted, &b_optvalue, sizeof(bool));
  b_optvalue = true;
  laser.setlidaropt(LidarPropAutoReconnect, &b_optvalue, sizeof(bool));
  b_optvalue = false;
  laser.setlidaropt(LidarPropSingleChannel, &b_optvalue, sizeof(bool));
  laser.setlidaropt(LidarPropIntenstiy, &b_optvalue, sizeof(bool));
  laser.setlidaropt(LidarPropSupportMotorDtrCtrl, &b_optvalue, sizeof(bool));
  laser.setlidaropt(LidarPropSupportHeartBeat, &b_optvalue, sizeof(bool));
  float f_optvalue = 180.0f;
  laser.setlidaropt(LidarPropMaxAngle, &f_optvalue, sizeof(float));
  f_optvalue = -180.0f;
  laser.setlidaropt(LidarPropMinAngle, &f_optvalue, sizeof(float));
  f_optvalue = 16.f;
  laser.setlidaropt(LidarPropMaxRange, &f_optvalue, sizeof(float));
  f_optvalue = 0.1f;
  laser.setlidaropt(LidarPropMinRange, &f_optvalue, sizeof(float));
  f_optvalue = 10.f;
  laser.setlidaropt(LidarPropScanFrequency, &f_optvalue, sizeof(float));
  bool ret = laser.initialize();
  if (ret) {
    ret = laser.turnOn();
  } else {
    fprintf(stderr, "%s\n", laser.DescribeError());
    fflush(stderr);
  }
  while (ret && ydlidar::os_isOk()) {
    LaserScan scan;
    if (laser.doProcessSimple(scan)) {
      fprintf(stdout, "Scan received[%llu]: %u ranges is [%f]Hz\n", scan.stamp, (unsigned int)scan.points.size(), 1.0 / scan.config.scan_time);
      fflush(stdout);
    } else {
      fprintf(stderr, "Failed to get Lidar Data\n");
      fflush(stderr);
    }
  }
  laser.turnOff();
  laser.disconnecting();
  return 0;
}
```

--------------------------------

### Initialize and Start Lidar Scanning

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_network_adapter_tutorial_c++.md

Initializes the Lidar device and starts its scanning routine on a separate thread. Includes error handling for initialization failures and starts the motor. Returns false if initialization or turning on fails.

```c++
bool ret = laser.initialize();
if (ret) {
  ret = laser.turnOn();
} else {
  fprintf(stderr, "%s\n", laser.DescribeError());
  fflush(stderr);
}
```

--------------------------------

### Configure and Initialize LiDAR

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_network_adapter_tutorial_c++.md

This documentation outlines how to set LiDAR properties such as network configuration, range, and frequency, and how to start the scanning process.

```APIDOC
## [METHOD] setlidaropt

### Description
Configures specific properties for the LiDAR device, such as communication type, network settings, and operational ranges.

### Method
C++ SDK Method Call

### Parameters
#### Properties
- **LidarPropSerialPort** (string) - Required - The IP address of the LiDAR (for TCP).
- **LidarPropSerialBaudrate** (int) - Required - The network port of the LiDAR.
- **LidarPropDeviceType** (int) - Required - The device type (e.g., YDLIDAR_TYPE_TCP).
- **LidarPropMaxRange** (float) - Optional - Maximum detection range in meters.
- **LidarPropScanFrequency** (float) - Optional - Scanning frequency in Hz.

### Request Example
laser.setlidaropt(LidarPropSerialPort, "192.168.31.200", size);
laser.setlidaropt(LidarPropDeviceType, &YDLIDAR_TYPE_TCP, sizeof(int));

### Response
#### Success Response
- **ret** (bool) - Returns true if initialization and connection are successful.

#### Response Example
if (laser.initialize()) { laser.turnOn(); }
```

--------------------------------

### Build YDLIDAR SDK Source as Shared Library with Examples Disabled

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/YDLIDAR_SDK_API_for_Developers.md

Command to build the YDLIDAR SDK from source as a shared library and disable example executables. This combines two common build configurations.

```shell
$cmake -DBUILD_EXAMPLES=OFF -DBUILD_SHARED_LIBS=ON ../ && make
```

--------------------------------

### Initialize and Configure YDLIDAR Device in C++

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_network_adapter_tutorial_c++.md

This snippet shows how to instantiate a CYdLidar object, configure various properties such as port, baudrate, device type, and scan parameters, and start the data acquisition loop.

```cpp
#include "CYdLidar.h"
#include <string>
using namespace std;
using namespace ydlidar;

#if defined(_MSC_VER)
#pragma comment(lib, "ydlidar_sdk.lib")
#endif

int main(int argc, char *argv[]) {
  ydlidar::os_init();
  CYdLidar laser;
  std::string port = "192.168.31.200";
  laser.setlidaropt(LidarPropSerialPort, port.c_str(), port.size());
  
  int optval = 8000;
  laser.setlidaropt(LidarPropSerialBaudrate, &optval, sizeof(int));
  optval = YDLIDAR_TYPE_TCP;
  laser.setlidaropt(LidarPropDeviceType, &optval, sizeof(int));

  bool ret = laser.initialize();
  if (ret) {
    ret = laser.turnOn();
  }

  while (ret && ydlidar::os_isOk()) {
    LaserScan scan;
    if (laser.doProcessSimple(scan)) {
      fprintf(stdout, "Scan received: %u points\n", (unsigned int)scan.points.size());
    }
  }
  laser.turnOff();
  laser.disconnecting();
  return 0;
}
```

--------------------------------

### Install CMake using vcpkg on Windows

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/howto/how_to_build_and_install.md

Installs CMake using the vcpkg package manager for both 32-bit and 64-bit Windows projects. It also integrates vcpkg with the build environment.

```shell
.\vcpkg install cmake
.\vcpkg integrate install
.\vcpkg install cmake:x64-windows
.\vcpkg integrate install
```

--------------------------------

### Build YDLidar-SDK on Linux

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/howto/how_to_build_and_install.md

Clones the YDLidar-SDK repository, creates a build directory, configures the project with CMake, compiles the SDK, and installs it.

```shell
git clone https://github.com/YDLIDAR/YDLidar-SDK.git
cd YDLidar-SDK
mkdir build
cd build
cmake ..
make
sudo make install
```

--------------------------------

### Start Lidar Motor (C++)

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/YDLIDAR_SDK_API_for_Developers.md

Initiates the operation of the Lidar's motor. Returns RESULT_OK on success.

```C++
result_t startMotor();
```

--------------------------------

### SDK Initialization and Control

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/YDLIDAR_SDK_API_for_Developers.md

Functions for initializing, starting, stopping, and uninitializing the YDLIDAR SDK and device.

```APIDOC
## initialize

### Description
Initializes the SDK and the LiDAR device.

### Method
bool

### Endpoint
N/A (C++ function)

### Parameters
None

### Request Example
```cpp
CYdLidar laser;
if (laser.initialize()) {
    // Initialization successful
}
```

### Response
#### Success Response (true)
- SDK and device initialized successfully.

#### Response Example
```json
{
  "success": true
}
```

## turnOn

### Description
Starts the device scanning routine on a separate thread and enables the motor.

### Method
bool

### Endpoint
N/A (C++ function)

### Parameters
None

### Request Example
```cpp
CYdLidar laser;
if (laser.turnOn()) {
    // Scanning started successfully
}
```

### Response
#### Success Response (true)
- Scanning started successfully.

#### Response Example
```json
{
  "success": true
}
```

## turnOff

### Description
Stops the device scanning thread and disables the motor.

### Method
bool

### Endpoint
N/A (C++ function)

### Parameters
None

### Request Example
```cpp
CYdLidar laser;
if (laser.turnOff()) {
    // Scanning stopped successfully
}
```

### Response
#### Success Response (true)
- Scanning stopped successfully.

#### Response Example
```json
{
  "success": true
}
```

## disconnecting

### Description
Uninitializes the SDK and disconnects the LiDAR device.

### Method
void

### Endpoint
N/A (C++ function)

### Parameters
None

### Request Example
```cpp
CYdLidar laser;
laser.disconnecting();
```

### Response
None
```

--------------------------------

### Method 2: Include SDK as subdirectory

Source: https://context7.com/ydlidar/ydlidar-sdk/llms.txt

This method shows how to include the YDLidar SDK source directly into your project as a subdirectory, which avoids the need for separate installation.

```APIDOC
## Include SDK as subdirectory

### Description
This CMake configuration includes the YDLidar SDK source code as a subdirectory of your project. This approach is useful when you don't want to install the SDK system-wide.

### Method
CMake build system

### Endpoint
N/A

### Parameters
N/A

### Request Body
N/A

### Request Example
```cmake
cmake_minimum_required(VERSION 2.8)
project(my_lidar_project)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

# Include YDLidar SDK directories
include_directories(
    ${CMAKE_SOURCE_DIR}
    ${CMAKE_SOURCE_DIR}/YDLidar-SDK
    ${CMAKE_SOURCE_DIR}/YDLidar-SDK/src
    ${CMAKE_CURRENT_BINARY_DIR}/YDLidar-SDK
)

# Add SDK as subdirectory
add_subdirectory(YDLidar-SDK)

# Create executable
add_executable(my_lidar_app main.cpp)

# Link to SDK
target_link_libraries(my_lidar_app ydlidar_sdk)
```

### Response
N/A

### Response Example
N/A
```

--------------------------------

### Initialize System Signal Handling

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_tutorial_c.md

Initializes system signal handling, specifically installing a SIGINT handler for Ctrl+C interruption. This ensures graceful shutdown.

```c
os_init();
```

--------------------------------

### Manage YDLidar Lifecycle in C++

Source: https://context7.com/ydlidar/ydlidar-sdk/llms.txt

This snippet demonstrates the full lifecycle of a YDLidar device using the C++ SDK. It covers configuring device options, initializing the connection, starting the scanning thread, performing data acquisition, and safely shutting down the device.

```cpp
#include "CYdLidar.h"
#include <iostream>

int main() {
    ydlidar::os_init();
    CYdLidar laser;

    std::string port = "/dev/ttyUSB0";
    laser.setlidaropt(LidarPropSerialPort, port.c_str(), port.size());
    int baudrate = 230400;
    laser.setlidaropt(LidarPropSerialBaudrate, &baudrate, sizeof(int));
    int lidarType = TYPE_TRIANGLE;
    laser.setlidaropt(LidarPropLidarType, &lidarType, sizeof(int));
    int deviceType = YDLIDAR_TYPE_SERIAL;
    laser.setlidaropt(LidarPropDeviceType, &deviceType, sizeof(int));

    bool ret = laser.initialize();
    if (!ret) {
        std::cerr << "Initialization failed: " << laser.DescribeError() << std::endl;
        return -1;
    }

    ret = laser.turnOn();
    if (!ret) {
        std::cerr << "Failed to start scanning: " << laser.DescribeError() << std::endl;
        laser.disconnecting();
        return -1;
    }

    LaserScan scan;
    for (int i = 0; i < 100 && ydlidar::os_isOk(); i++) {
        if (laser.doProcessSimple(scan)) {
            std::cout << "Scan " << i << ": " << scan.points.size() << " points" << std::endl;
        }
    }

    laser.turnOff();
    laser.disconnecting();
    return 0;
}
```

--------------------------------

### Triangle LiDAR Initialization and Scanning

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/YDLIDAR_SDK_API_for_Developers.md

This C++ code snippet shows how to initialize the YDLIDAR SDK, configure various parameters for a Triangle LiDAR, start the scanning process, and continuously process incoming scan data.

```APIDOC
## Triangle LiDAR Initialization and Scanning

### Description
This example demonstrates the initialization and usage of the YDLIDAR SDK with a Triangle LiDAR sensor. It covers setting up serial port, baud rate, LiDAR type, and other essential configurations. The code then starts the LiDAR scanning, processes scan data in a loop, and handles potential errors.

### Method
This is a C++ code example demonstrating SDK usage, not a direct API endpoint.

### Endpoint
N/A (SDK Usage Example)

### Parameters
This section details the configuration parameters set for the LiDAR sensor using `setlidaropt`:

#### String Properties
- **LidarPropSerialPort** (string) - Required - The serial port the LiDAR is connected to (e.g., \"/dev/ydlidar\").
- **LidarPropIgnoreArray** (string) - Optional - A string to ignore specific data points.

#### Integer Properties
- **LidarPropSerialBaudrate** (int) - Required - The baud rate for serial communication (e.g., 230400).
- **LidarPropLidarType** (int) - Required - Specifies the LiDAR type, set to `TYPE_TRIANGLE` for Triangle LiDAR.
- **LidarPropDeviceType** (int) - Required - Specifies the device type, set to `YDLIDAR_TYPE_SERIAL` for serial devices.
- **LidarPropSampleRate** (int) - Optional - The sample rate for the LiDAR (e.g., 9).
- **LidarPropAbnormalCheckCount** (int) - Optional - The number of abnormal checks before reporting an error (e.g., 4).

#### Boolean Properties
- **LidarPropFixedResolution** (bool) - Optional - Whether to use fixed angle resolution (false).
- **LidarPropReversion** (bool) - Optional - Whether to reverse the scan direction (false).
- **LidarPropInverted** (bool) - Optional - Whether to invert the scan (false).
- **LidarPropAutoReconnect** (bool) - Optional - Whether to enable automatic reconnection (true).
- **LidarPropSingleChannel** (bool) - Optional - Whether to use one-way communication (false).
- **LidarPropIntenstiy** (bool) - Optional - Whether to enable intensity data (false).
- **LidarPropSupportMotorDtrCtrl** (bool) - Optional - Whether to support motor DTR control (false).

#### Float Properties
- **LidarPropMaxAngle** (float) - Optional - The maximum scan angle in degrees (e.g., 180.0f).
- **LidarPropMinAngle** (float) - Optional - The minimum scan angle in degrees (e.g., -180.0f).
- **LidarPropMaxRange** (float) - Optional - The maximum detection range in meters (e.g., 16.f).
- **LidarPropMinRange** (float) - Optional - The minimum detection range in meters (e.g., 0.1f).
- **LidarPropScanFrequency** (float) - Optional - The desired scan frequency in Hz (e.g., 10.f).

### Request Example
```cpp
#include "CYdLidar.h"
#include <iostream>
#include <string>
#include <algorithm>
#include <cctype>

using namespace std;
using namespace ydlidar;

#if defined(_MSC_VER)
#pragma comment(lib, "ydlidar_sdk.lib")
#endif

int main(int argc, char *argv[]) {
  // init system signal
  ydlidar::os_init();

  CYdLidar laser;

  // Configure LiDAR properties...
  std::string port = "/dev/ydlidar";
  laser.setlidaropt(LidarPropSerialPort, port.c_str(), port.size());
  int optval = 230400;
  laser.setlidaropt(LidarPropSerialBaudrate, &optval, sizeof(int));
  optval = TYPE_TRIANGLE;
  laser.setlidaropt(LidarPropLidarType, &optval, sizeof(int));
  // ... other setlidaropt calls ...

  // Initialize and start scanning
  bool ret = laser.initialize();
  if (ret) {
    ret = laser.turnOn();
  } else {
    fprintf(stderr, "%s\n", laser.DescribeError());
    fflush(stderr);
  }

  // Process scan data
  while (ret && ydlidar::os_isOk()) {
    LaserScan scan;
    if (laser.doProcessSimple(scan)) {
      fprintf(stdout, "Scan received[%llu]: %u ranges is [%f]Hz\n",
              scan.stamp,
              (unsigned int)scan.points.size(), 1.0 / scan.config.scan_time);
      fflush(stdout);
    } else {
      fprintf(stderr, "Failed to get Lidar Data\n");
      fflush(stderr);
    }
  }

  // Stop and disconnect
  laser.turnOff();
  laser.disconnecting();
  return 0;
}
```

### Response

#### Success Response (200)
This example does not directly return HTTP responses. Instead, it processes scan data and prints information to standard output.

- **scan.stamp** (unsigned long long) - Timestamp of the scan.
- **scan.points.size()** (unsigned int) - Number of data points in the scan.
- **1.0 / scan.config.scan_time** (float) - Scan frequency in Hz.

#### Response Example
```
Scan received[1678886400]: 1024 ranges is [10.000000]Hz
```

#### Error Handling
- If `laser.initialize()` fails, an error message is printed to stderr using `laser.DescribeError()`.
- If `laser.doProcessSimple(scan)` fails, "Failed to get Lidar Data" is printed to stderr.
```

--------------------------------

### Explanation: Turning On the LiDAR Device

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_tutorial_python.md

This snippet attempts to turn on the LiDAR device and start its scanning routine, which runs in a separate thread. It returns false if the lidar stalls or experiences power supply issues.

```python
if ret:
        ret = laser.turnOn();
```

--------------------------------

### Define Build Options

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/CMakeLists.txt

Defines boolean options that control which parts of the SDK are built. Users can enable or disable building shared libraries, examples, C# bindings, and tests.

```cmake
option( BUILD_SHARED_LIBS "Build shared libraries." OFF)
option( BUILD_EXAMPLES "Build Example." ON)
option( BUILD_CSHARP "Build CSharp." OFF)
option( BUILD_TEST "Build Test." OFF)
```

--------------------------------

### Start Lidar Scan (C++)

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/YDLIDAR_SDK_API_for_Developers.md

Initiates the Lidar scanning process. Can optionally force a restart and has a timeout parameter. This function should be called before attempting to grab scan data. Returns RESULT_OK on success.

```C++
virtual result_t startScan(bool force = false, uint32_t timeout = DEFAULT_TIMEOUT);
```

--------------------------------

### Create beginner_tutorials Directories

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_tutorial_python.md

This snippet demonstrates how to create the necessary directory structure for the lidar tutorial project using shell commands.

```shell
mkdir beginner_tutorials
cd beginner_tutorials
```

--------------------------------

### Initialize YDLIDAR SDK and System

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_network_adapter_tutorial_c++.md

Includes necessary headers, initializes the SDK's system signals for Ctrl-C handling, and creates a handle for the Lidar device.

```c++
#include "CYdLidar.h"

// ...

ydlidar::os_init();
CYdLidar laser;
```

--------------------------------

### Build Project from Command Line

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_network_adapter_tutorial_c++.md

Standard sequence of commands to create a build directory, run CMake configuration, and compile the project using make.

```bash
mkdir build
cd build
cmake ..
make j4
```

--------------------------------

### YDLIDAR SDK Initialization and Configuration

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_tutorial_c.md

This snippet covers the essential steps for initializing the YDLIDAR SDK, including system initialization, lidar creation, port detection, and setting various configuration parameters (serial port, baud rate, lidar type, sample rate, boolean properties, and float properties).

```APIDOC
## YDLIDAR SDK Initialization and Configuration

### Description
This section details the process of initializing the YDLIDAR SDK and configuring the lidar device. It includes steps for system initialization, creating a lidar handle, discovering available serial ports, and setting various properties such as serial port, baud rate, lidar type, sample rate, and other boolean and float parameters.

### Method
C++ SDK functions

### Endpoint
N/A (Local SDK operations)

### Parameters
#### Path Parameters
N/A

#### Query Parameters
N/A

#### Request Body
N/A

### Request Example
```c++
#include "ydlidar_sdk.h"

os_init();
YDLidar *laser = lidarCreate();

// string prop
char port[50] = "/dev/ydlidar";
LidarPort ports;
int size = lidarPortList(&ports);
int i = 0;
for(i =0; i < size; i++) {
    printf("port: %s\n", ports.port[i].data);
    /// last port
    strcpy(port, ports.port[i].data);
}
setlidaropt(laser, LidarPropSerialPort, port, sizeof(port));
strcpy(port, "");
setlidaropt(laser, LidarPropIgnoreArray,port, sizeof(port));

// int prop
int i_optvalue = 512000;
setlidaropt(laser, LidarPropSerialBaudrate, &i_optvalue, sizeof(int));
i_optvalue = TYPE_TOF;
setlidaropt(laser, LidarPropLidarType, &i_optvalue, sizeof(int));
i_optvalue = YDLIDAR_TYPE_SERIAL;
setlidaropt(laser, LidarPropDeviceType, &i_optvalue, sizeof(int));
i_optvalue = 20;
setlidaropt(laser, LidarPropSampleRate, &i_optvalue, sizeof(int));

// bool prop
bool b_optval = true;
setlidaropt(laser, LidarPropAutoReconnect, &b_optval, sizeof(bool));
b_optval = false;
setlidaropt(laser, LidarPropSingleChannel, &b_optval, sizeof(bool));
setlidaropt(laser, LidarPropIntenstiy, &b_optval, sizeof(bool));
setlidaropt(laser, LidarPropInverted, &b_optval, sizeof(bool));
setlidaropt(laser, LidarPropReversion, &b_optval, sizeof(bool));
setlidaropt(laser, LidarPropSupportMotorDtrCtrl, &b_optval, sizeof(bool));
setlidaropt(laser, LidarPropFixedResolution, &b_optval, sizeof(bool));

// float prop
float f_optval = 10.f;
setlidaropt(laser, LidarPropScanFrequency, &f_optval, sizeof(float));
f_optval = 180.0f;
setlidaropt(laser, LidarPropMaxAngle, &f_optval, sizeof(float));
f_optval = -180.0f;
setlidaropt(laser, LidarPropMinAngle, &f_optval, sizeof(float));
f_optval = 64.f;
setlidaropt(laser, LidarPropMaxRange, &f_optval, sizeof(float));
f_optval = 0.05f;
setlidaropt(laser, LidarPropMinRange, &f_optval, sizeof(float));

bool ret = initialize(laser);
```

### Response
#### Success Response (200)
N/A (This is an initialization and configuration step, not a direct API call with a response)

#### Response Example
N/A
```

--------------------------------

### Install Python Scripts with CMake

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/csharp/examples/CMakeLists.txt

This CMake script locates all Python files (*.py) in the current source directory and installs them to the 'bin' destination. It sets specific file permissions for the installed executables, ensuring owner and group execute permissions, along with read permissions for others.

```cmake
set(curdir ${CMAKE_CURRENT_SOURCE_DIR})
FILE(GLOB APP_LIST "${curdir}/*.py")
foreach(child ${APP_LIST})
    install(FILES ${child} DESTINATION bin PERMISSIONS OWNER_READ
        OWNER_WRITE
        OWNER_EXECUTE
        GROUP_EXECUTE
        WORLD_READ
        WORLD_EXECUTE)
endforeach()
```

--------------------------------

### Explanation: Initializing the SDK and LiDAR

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_tutorial_python.md

This code attempts to initialize the YDLIDAR SDK and the connected LiDAR device. It returns false if initialization fails due to issues like incorrect port, permissions, baud rate, or lidar type.

```c++
// initialize SDK and LiDAR
    ret = laser.initialize();
```

--------------------------------

### Start Scanning and Process Data

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_tutorial_c++.md

Starts the device scanning routine and enters a loop to process incoming LaserScan data until the system is shut down or interrupted.

```c++
if (laser.turnOn()) {
  while (ydlidar::os_isOk()) {
    LaserScan scan;
    if (laser.doProcessSimple(scan)) {
      printf("Scan received: %u points\n", (unsigned int)scan.points.size());
    }
  }
}
```

--------------------------------

### Initialize and Configure YDLIDAR in C

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/tutorials/writing_lidar_tutorial_c.md

This code demonstrates the lifecycle of a YDLIDAR device, including port discovery, setting various configuration properties (string, integer, boolean, and float), and entering a processing loop to capture scan data. It requires the ydlidar_sdk library and handles both Windows and POSIX environments.

```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef WIN32
#include <windows.h>
#else
#include <unistd.h>
#endif
#include "ydlidar_sdk.h"

#if defined(_MSC_VER)
#pragma comment(lib, "ydlidar_sdk.lib")
#endif

int main(int argc, const char *argv[]) {
    os_init();
    YDLidar *laser = lidarCreate();
    char port[50] = "/dev/ydlidar";
    LidarPort ports;
    int size = lidarPortList(&ports);
    for(int i = 0; i < size; i++) {
        printf("port: %s\n", ports.port[i].data);
        strcpy(port, ports.port[i].data);
    }
    setlidaropt(laser, LidarPropSerialPort, port, sizeof(port));
    
    int i_optvalue = 512000;
    setlidaropt(laser, LidarPropSerialBaudrate, &i_optvalue, sizeof(int));
    
    bool b_optval = true;
    setlidaropt(laser, LidarPropAutoReconnect, &b_optval, sizeof(bool));

    bool ret = initialize(laser);
    if(ret) {
        ret = turnOn(laser);
    }

    LaserFan scan;
    LaserFanInit(&scan);
    while (ret && os_isOk()) {
        if(doProcessSimple(laser, &scan)) {
            fprintf(stdout, "Scan received[%llu]: %u ranges\n", scan.stamp, (unsigned int)scan.npoints);
        }
    }
    LaserFanDestroy(&scan);
    turnOff(laser);
    disconnecting(laser);
    lidarDestroy(&laser);
    return 0;
}
```

--------------------------------

### Get Lidar Status and Information (C++)

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/YDLIDAR_SDK_API_for_Developers.md

Provides functions to check the connection status, scanning status, and retrieve the SDK version. It also includes a function to get the device's health status and detailed information, with configurable timeouts for these operations.

```C++
virtual const char *DescribeError(bool isTCP = true);

virtual std::string getSDKVersion();

virtual bool isscanning() const;

virtual bool isconnected() const;

virtual result_t getHealth(device_health &health, uint32_t timeout = DEFAULT_TIMEOUT);

virtual result_t getDeviceInfo(device_info &info, uint32_t timeout = DEFAULT_TIMEOUT);
```

--------------------------------

### SDK Initialization and Device Control (C)

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/YDLIDAR_SDK_API_for_Developers.md

Functions for initializing the YDLIDAR SDK and controlling the lidar device's operation. `initialize` prepares the SDK for use, and `turnOn` starts the lidar's scanning routine on a separate thread. `doProcessSimple` is mentioned as a prerequisite for obtaining scan data after `turnOn` is successful.

```C
/**
 * Initialize the SDK.
 * @return true if successfully initialized, otherwise false.
 */
bool initialize(YDLidar *lidar);

/**
 * Start the device scanning routine which runs on a separate thread.
 * @return true if successfully started, otherwise false.
 */
bool turnOn(YDLidar *lidar);

/**
 * @brief Get the LiDAR Scan Data. turnOn is successful before doProcessSimple scan data.
 * @param[in] lidar          LiDAR instance
 * @param[out] outscan       LiDAR Scan Data
 * @return true if successfully started, otherwise false.
 */

```

--------------------------------

### Initialize and Scan with YDLIDAR SDK in Python

Source: https://github.com/ydlidar/ydlidar-sdk/blob/master/doc/YDLIDAR_SDK_API_for_Developers.md

This Python script demonstrates how to initialize the YDLIDAR device, configure its parameters (serial port, baud rate, lidar type, etc.), and continuously process scan data. It includes error handling for initialization and data processing, and a loop to fetch scan data at a specified frequency.

```Python
import os
import ydlidar
import time

if __name__ == "__main__":
    ydlidar.os_init();
    laser = ydlidar.CYdLidar();
    laser.setlidaropt(ydlidar.LidarPropSerialPort, "/dev/ydlidar");
    laser.setlidaropt(ydlidar.LidarPropSerialBaudrate, 230400);
    laser.setlidaropt(ydlidar.LidarPropLidarType, ydlidar.TYPE_TRIANGLE);
    laser.setlidaropt(ydlidar.LidarPropDeviceType, ydlidar.YDLIDAR_TYPE_SERIAL);
    laser.setlidaropt(ydlidar.LidarPropScanFrequency, 10.0);
    laser.setlidaropt(ydlidar.LidarPropSampleRate, 9);
    laser.setlidaropt(ydlidar.LidarPropSingleChannel, False);

    ret = laser.initialize();
    if ret:
        ret = laser.turnOn();
        scan = ydlidar.LaserScan();
        while ret and ydlidar.os_isOk() :
            r = laser.doProcessSimple(scan);
            if r:
                print("Scan received[",scan.stamp,"]:",scan.points.size(),"ranges is [",1.0/scan.config.scan_time,"]Hz");
            else :
                print("Failed to get Lidar Data")
            time.sleep(0.05);
        laser.turnOff();
    laser.disconnecting();

```