Connecting with Arduino over USB
========================================

.. code-block::

	 Arduino Code
        String incomingMessage = "";

        void setup() {
          pinMode(LED_BUILTIN, OUTPUT);
          Serial.begin(9600);
        }

        void loop() {
          if (Serial.available()) {
            incomingMessage = Serial.readStringUntil('\n');
            incomingMessage.trim();  // Remove whitespace and newline

            if (incomingMessage == "ON") {
              digitalWrite(LED_BUILTIN, HIGH);
              Serial.println("LED is ON");
            } else if (incomingMessage == "OFF") {
              digitalWrite(LED_BUILTIN, LOW);
              Serial.println("LED is OFF");
            } else {
              Serial.println("Unknown command");
            }
          }
        }

.. code-block::

    #include "rlenvs/boards/arduino/arduino_connector_usb_base.h"

    #include <iostream>
    #include <string>
    #include <chrono>
    #include <thread>

    namespace example
    {
        using rlenvscpp::boards::arduino::ArduinoCMDBase;
        using rlenvscpp::boards::arduino::ArduinoConnectorUSBBase;

        struct ArduinoONCMD: public ArduinoCMDBase
        {
            virtual std::string get_cmd()const final;
        };

        std::string ArduinoONCMD::get_cmd() const
        {
            return "ON";
        }

        struct ArduinoOFFCMD: public ArduinoCMDBase
        {
            virtual std::string get_cmd()const final;
        };

        std::string ArduinoOFFCMD::get_cmd() const
        {
            return "OFF";
        }
    }


    int main() {

        using namespace example;

        ArduinoConnectorUSBBase connector("/dev/ttyACM0");
        connector.connect();

        ArduinoONCMD on_cmd;
        ArduinoOFFCMD off_cmd;

        std::string user_input;
        while (true) {
            std::cout << "Enter command ON/OFF or e (to exit): ";
            std::getline(std::cin, user_input);

            if (user_input == "e") {
                connector.send_cmd(off_cmd);
                break;
            }

            if (user_input == "ON")
            {
                connector.send_cmd(on_cmd);
            }

            if (user_input == "OFF")
            {
                connector.send_cmd(off_cmd);
            }

            std::this_thread::sleep_for(std::chrono::seconds(1));
        }

        connector.close_connection();
        return 0;
    }


References
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