add node with basic code to read sensor

src/height/src/height_reader.cpp

@@ -1,10 +1,81 @@
-#include <cstdio>
+#include <chrono>
+#include <iostream>
 
-int main(int argc, char ** argv)
+#include "rclcpp/rclcpp.hpp"
+
+#include <terabee/ITerarangerFactory.hpp>
+#include <terabee/ITerarangerEvoMini.hpp>
+#include <terabee/DistanceData.hpp>
+
+using namespace std::chrono_literals;
+
+using terabee::DistanceData;
+using terabee::ITerarangerEvoMini;
+
+std::ostream &operator<<(std::ostream &os, const DistanceData &d)
 {
-  (void) argc;
+  os << "[";
-  (void) argv;
+  for (size_t i = 0; i < d.distance.size(); i++)
+  {
+    os << d.distance[i] << ", ";
+  }
+  os << "\b\b"
+     << " ]";
+  return os;
+}
+
+class HeightReader : public rclcpp::Node
+{
+public:
+  HeightReader() : rclcpp::Node("height_reader")
+  {
+    rcl_interfaces::msg::ParameterDescriptor descriptor = rcl_interfaces::msg::ParameterDescriptor{};
+    descriptor.description = "serial port for the USB port of the height sensor";
+
+    this->declare_parameter("height_serial_port", "/dev/ttyACM0", descriptor);
+
+    factory = terabee::ITerarangerFactory::getFactory();
+    evo_mini = factory->createTerarangerEvoMini(this->get_parameter("height_serial_port").as_string());
+
+    if (!evo_mini)
+    {
+      RCLCPP_ERROR(this->get_logger(), "Failed to create Evo Mini!");
+      return;
+    }
+
+    evo_mini->setPixelMode(ITerarangerEvoMini::Px4Mode);
+
+    if (!evo_mini->initialize())
+    {
+      RCLCPP_ERROR(this->get_logger(), "Failed to initialize evo mini!");
+      return;
+    }
+
+    RCLCPP_INFO(this->get_logger(), "Succesfully initialized Evo mini!");
+
+    timer_ = this->create_wall_timer(500ms, std::bind(HeightReader::read_height, this));
+  }
+
+private:
+  void read_height()
+  {
+    std::cout << "Distance = " << evo_mini->getDistance() << std::endl;
+  }
+
+  rclcpp::TimerBase::SharedPtr timer_;
+
+  std::unique_ptr<terabee::ITerarangerFactory> factory;
+  std::unique_ptr<terabee::ITerarangerEvoMini> evo_mini;
+};
+
+int main(int argc, char **argv)
+{
+  (void)argc;
+  (void)argv;
+
+  rclcpp::init(argc, argv);
+
+  rclcpp::shutdown();
 
-  printf("hello world height package\n");
   return 0;
 }