Hi. I’m totally new to JUCE and, while I am pretty fluent in C, I am also fairly new to C++ so please bear with me if I am being stupid!
I may have taken on a tough challenge for my first JUCE ‘learning’ project but I am trying to write a ‘simple’ GUI to send and receive ASCII data via the USB Serial connection to an Arduino.
I have been using the Serial Port module originally written by graffiti and updated by Chris Roberts.
I have managed to get a list of serial ports on my PC (Win10), add them to a combo box to let me select the port that the Arduino is connected to and the Arduino reboots in the normal way when I select the port but I’m at a loss as to how to receive the data that the Arduino is sending. It starts with a simple ASCII string terminated by a newline to identify itself. I have set the input stream to notify when a newline is received.
I’ve tried adding a Listener but what is the Serial port object that is sending the message?
Is there a way for me to post the code here? I don’t see any ‘code’ tags
It‘s as simple as pasting it here and putting three backticks ``` in the line above and below it
Regarding the question, I don’t know that module but having a quick look at the example code (which is full of memory leaks by the way ) it seems that you just need to read from the SerialPortInputStream instance created for a certain port once you are notified by the change broadcaster. The SerialPortInputStream seems to inherit juce::InputStream. But as I said this is my conclusion from looking at the code for two minutes, never actually worked with it
#include "MainComponent.h"
//==============================================================================
MainComponent::MainComponent()
{
setSize (600, 400);
addAndMakeVisible(textLabel);
textLabel.setFont(textFont);
addAndMakeVisible(sendButton);
sendButton.setButtonText("Send");
addAndMakeVisible(getButton);
getButton.setButtonText("Get");
addAndMakeVisible(loadButton);
loadButton.setButtonText("Load");
addAndMakeVisible(saveButton);
saveButton.setButtonText("Save");
addAndMakeVisible(serialPortMenu);
//get a list of serial ports installed on the system, as a StringPairArray containing a friendly name and the port path
portlist = SerialPort::getSerialPortPaths();
DBG("There is(are) " + juce::String(portlist.size()) + " ports.");
// add Serial Port names to the combo-box
for (int i = 0; i < portlist.size(); i ++ )
serialPortMenu.addItem(portlist.getAllValues()[i],i+1);
// Set up the handler function for when the user chooses an item in the list
serialPortMenu.onChange = [this] { serialPortMenuChanged(); };
serialPortMenu.setSelectedId(1);
getButton.onClick = [this] { getPatches(); };
sendButton.onClick = [this] { sendPatches(); };
saveButton.onClick = [this] { savePatches(); };
loadButton.onClick = [this] { loadPatches(); };
}
MainComponent::~MainComponent()
{
}
//==============================================================================
void MainComponent::paint (juce::Graphics& g)
{
// (Our component is opaque, so we must completely fill the background with a solid colour)
}
void MainComponent::resized()
{
// This is called when the MainComponent is resized.
// If you add any child components, this is where you should
// update their positions.
auto area = getLocalBounds();
auto buttonsSpace = 4;
auto buttonsHeight = 40;
auto buttonsWidth = 60;
auto dropBoxWidth = 100;
buttonsArea = area.removeFromBottom(buttonsHeight);
textLabel.setBounds (10, 10, getWidth() - 20, 20);
serialPortMenu.setBounds (10, 40, dropBoxWidth, 30);
sendButton.setBounds(buttonsArea.removeFromLeft(buttonsWidth).reduced(buttonsSpace));
getButton.setBounds(buttonsArea.removeFromLeft(buttonsWidth).reduced(buttonsSpace));
loadButton.setBounds(buttonsArea.removeFromLeft(buttonsWidth).reduced(buttonsSpace));
saveButton.setBounds(buttonsArea.removeFromLeft(buttonsWidth).reduced(buttonsSpace));
}
void MainComponent::serialPortMenuChanged()
{
DBG("serialPortMenuChanged function called");
pSP = new SerialPort(portlist.getAllValues()[serialPortMenu.getSelectedId() - 1], SerialPortConfig(57600, 8, SerialPortConfig::SERIALPORT_PARITY_NONE, SerialPortConfig::STOPBITS_1, SerialPortConfig::FLOWCONTROL_NONE));
if(pSP->exists())
{
//create streams for reading/writing
pOutputStream = new SerialPortOutputStream(pSP);
pInputStream = new SerialPortInputStream(pSP);
pOutputStream->write("hello world via serial", 22); //write some bytes
// Ask to be notified when a new line is available:
// pInputStream->addChangeListener(this); //we must be a ChangeListener to receive notifications
pInputStream->setNotify(SerialPortInputStream::NOTIFY_ON_CHAR, '\n');
//please see class definitions for other features/functions etc
}
}
void MainComponent::getPatches()
{
DBG("getPatches button clicked");
}
void MainComponent::sendPatches()
{
DBG("sendPatches button clicked");
}
void MainComponent::savePatches()
{
DBG("savePatches button clicked");
}
void MainComponent::loadPatches()
{
DBG("loadPatches button clicked");
}
void MainComponent::serialEvent()
{
}
and the .h file:
#pragma once
#include <JuceHeader.h>
//==============================================================================
/*
This component lives inside our window, and this is where you should put all
your controls and content.
*/
class MainComponent : public juce::Component
{
public:
//==============================================================================
MainComponent();
~MainComponent() override;
//==============================================================================
void paint (juce::Graphics&) override;
void resized() override;
void getPatches();
void sendPatches();
void savePatches();
void loadPatches();
void serialEvent();
void serialPortMenuChanged();
private:
//==============================================================================
// Your private member variables go here...
juce::TextButton sendButton;
juce::TextButton getButton;
juce:: TextButton loadButton;
juce::TextButton saveButton;
juce::Rectangle<int> buttonsArea;
juce::Label textLabel { {}, "Serial Ports" };
juce::Font textFont { 16.0f };
juce::ComboBox serialPortMenu;
juce::StringPairArray portlist;
SerialPort * pSP;
SerialPortOutputStream* pOutputStream;
SerialPortInputStream* pInputStream;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainComponent)
};
Hi guys! I want to know if you could pass me some code that you used, because i am trying to conect the arduino with JUCE. My objetive is read values of temperature and humedity with the Arduino and then show them in an interface realize in juce. I really apreciate if someone can help me. Thanks, and sorry for my einglish.
Hello. I’m trying to implement Serial Port communication between my computer and a signal generator using RS-232. Would you mind helping me with some code for that? I’d really appreciate it
Hi all,
A new moment to do new thinks.
Since 2 days i try to start with juce_Serialport-master by i need to admit i’m newbees.
I didn’t start to build because i dont arrive to select the good path for juceheader .
Anyone can explain me the basics to use visual studio with this library or give me a more completed soft that i can start and learn properly…
but I am trying to write a ‘simple’ GUI to send and receive ASCII data via the USB Serial connection to an Arduino.
) it seems that you just need to read from the 
