I can't seem to figure out how to read data sent from Unity to Arduino. I tried the Serial.read() and Serial.readString() but it's not doing what it's supposed to. What it's supposed to do is turn on an LED.

Hi there! first of all... thanks for being so awesome!! your code works like a charm without fps drop :)

I am working on an Arduino Uno, under Windows 10 and Unity 2018.1.0f2 (64 bits).

There is a problem with the .send(message) method, it is easy to replicate:

open the scene WRMHLwrite and replace the loop method on the default arduino code on the ARDUINO.ino file with this code:

// Run forever
void loop() {
  sendData("Hello World!");

  if (Serial.available() > 0) {
    // int input = Serial.parseInt();
  }

  delay(20); // Choose your delay having in mind your ReadTimeout in Unity3D
}

This works OK, as the RX yellow light blinks when you play your unity game (unity is sending data from the update). But when you uncomment the line

int input = Serial.parseInt();

strange things begin to happen: when you play your game, both RX and TX lights blink once, and then the RX light turns off... the arduino stops receiving data!! also, weird things begin to happen with the data the arduino sends, and the serial port gets locked, not allowing you to upload new code to the arduino o.O (even when you stop your game on unity! o__O).

however, if you substitute that line for:

int input = Serial.read();

everything works just fine :)

I can't figure out where the error is on the code, but i'll keep searching, if I find something, i'll submit a pull request, but by now, I'll just leave this issue open over here...

sorry for my bad english :(

IOException: No such file or directory
System.IO.Ports.SerialPortStream.ThrowIOException ()
System.IO.Ports.SerialPortStream..ctor (System.String portName, Int32 baudRate, Int32 dataBits, Parity parity, StopBits stopBits, Boolean dtrEnable, Boolean rtsEnable, Handshake handshake, Int32 readTimeout, Int32 writeTimeout, Int32 readBufferSize, Int32 writeBufferSize)
(wrapper remoting-invoke-with-check) System.IO.Ports.SerialPortStream:.ctor (string,int,int,System.IO.Ports.Parity,System.IO.Ports.StopBits,bool,bool,System.IO.Ports.Handshake,int,int,int,int)
System.IO.Ports.SerialPort.Open ()
(wrapper remoting-invoke-with-check) System.IO.Ports.SerialPort:Open ()
wrmhlThread.openFlow () (at Assets/WRMHL/Scripts/Thread/Common/wrmhlThread.cs:74)
wrmhl.connect () (at Assets/WRMHL/Scripts/Manager/wrmhl.cs:53)
wrmhlWrite.Start () (at Assets/WRMHL/Scripts/wrmhlWrite.cs:29)

My system details:

Serial monitor shows normal function:

I closed arduino and serial monitor

Works for the first couple, but then null:

The issue is on this line:

I'm preparing a biology experiment where the communication would be very useful. How do I remedy this?
thanks so much!
-Brian

WRMHL is GREAT! Oh my god, wonderful. I'm using it with BLE to wirelessly communicate MPU9250 and potentiometer data from a toy to UNITY.

Everything has been great about your work except when I try to restart my scene. After restarting the scene with SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex); my character being controlled by WRMHL will not move. I can see that I am still receiving serial data.

I assume I need to call the wrhml.close() function. However, when I try to call an instance of wrhml from my other script it stops loading the rest of the script. Is there a problem with calling an instance of wrhml from another script?

How would you go about closing/restarting wrhml from another script?

In the release there is a Prefab called wrmhlReadLatest in the Unity project, but when adding that Prefab to a scene the "associated script can not be loaded". Is that something that was omitted from the commit by error? I'd love to have that script as I'm highly interested in getting the latest value and not concerned about data loss. Latency is my main worry.

'SerialUSB' was not declared in this scope

@maxime-coutte @al-haruun

I'm trying to get data from more than one sensor.
I thought of putting everything on a string by separating the various values with a symbol.
It's possible?
Thanks in advance for your answers, and in any case, thanks for the great job!

Hi
I am trying to run the Arduino code with my Arduino Uno and it seems that Serial USB is not declared in this scope. I followed the instructions for the libraries but still nothing.

Also I can not understand why does the code uses Serial USB and not just serial.If someone could help I would really appreciate it.
Thanks

NullReferenceException: Object reference not set to an instance of an object
wrmhlThread.writeThread (System.String dataToSend) (at Assets/WRMHL/Scripts/Thread/Common/wrmhlThread.cs:106)
wrmhl.send (System.String dataToSend) (at Assets/WRMHL/Scripts/Manager/wrmhl.cs:70)
wrmhlWrite.Update () (at Assets/WRMHL/Scripts/wrmhlWrite.cs:34)

Hello !

First of all, i will explain you what i want to do : I have a plant connected to my arduino, and i have number which explain the distance between my hand and the plant with a capacitive touch sensor :)

So as you saw in the first screen, its what i have on the Arduino's Serials Monitor when i start to listen with unity, and in the Debug Log, i lost a lot of data like this :

And when i mean "It drops a lot of times", i mean that i lost a lot of time data like have nothing, or have a half of the number ...

Thank you for your help and to be available to helping me

Hey thats a lot of good work ! But i seriously recommend a proper documentation so that this is friendly to people who are new to Unity as well as Arduino.. like using wrmhl in untiy script and further ...
Thanks

Good morning from Spain!
We have been using this repository since 2 weeks without any problem, whereas right now we are finding some problems with Unity and TimeOutException.
The real problem is:
TimeoutException: The operation has timed out.
System.IO.Ports.WinSerialStream.Read (System.Byte[] buffer, System.Int32 offset, System.Int32 count) (at <3845a180c26b4889bc2d47593a665814>:0)
System.IO.Ports.SerialPort.read_byte () (at <3845a180c26b4889bc2d47593a665814>:0)
System.IO.Ports.SerialPort.ReadTo (System.String value) (at <3845a180c26b4889bc2d47593a665814>:0)
System.IO.Ports.SerialPort.ReadLine () (at <3845a180c26b4889bc2d47593a665814>:0)
(wrapper remoting-invoke-with-check) System.IO.Ports.SerialPort.ReadLine()
wrmhlThread_Lines.ReadProtocol () (at Assets/WRMHL/Scripts/Thread/wrmhlThread_Lines.cs:40)
wrmhlThread.ThreadLoop () (at Assets/WRMHL/Scripts/Thread/Common/wrmhlThread.cs:114)

Could some one help us with this?
Thank you very much in advance.

Hi,

I just found your awesome project and now I'm trying to use it with my arduino project, but I'm not sure to use it correctly.

If i use the following arduino code : https://gist.github.com/Ldoppea/5ae1ef4f6fce579cd00238687b9e86c5
And run the Unity WRMHLread demo project,
Then the unity console will display the following :

• value : 100
• value : 66
• value : 32
• value : 215
• value : 183
  etc

A lot of messages are not received. What I would like is to receive:

• value : 100
• value : 99
• value : 98
• value : 97
• value : 96
  etc

It seems like WRMHL only ensures the last message before an update to be received but does not ensure ALL messages to be received. Am I correct?

Is there a way to receive ALL messages?

Thanks

Dosent work on unity android build because of mono ports.io not working and advice?