Hello, I used the plugin in 4.20.3.It is normal to use it without the wrapper project, but the plug-in cannot read the port after the wrapper project
Thank you!!!
Which wrapper project?
Anyways, maybe it was the version with a bug fixed on later ones, that indeed would prevent the port from opening. Try downloading the latest source from GitHub and compiling it.
Hello! 
Iām very new with Unreal Engine and i saw this plugin and thoughtā¦ āHey! i could make a cool GUI scoring for my home pinballā but i donāt know where to go from there haha. I have the game all coded in Arduino but for scoring (Arduino is doing the math for all 4 players) i want it to be displayed on Unreal Engine and maybe add pictures, how would i do this?
Example, if target/switch is hit -> Add score on Arduino -> printing/displaying scoring in Unreal Engine.
And for sharing data, how can i get Unreal Engine to talk to Arduino? Like In Unreal i want it to tell the Arduino to test lighting, coils and switches to see if theyāre working.
Example, custom GUI menu/settings, click āTest Lightingā in Unreal Engine -> Arduino will turn on all lights.
Thanks,
Hello Guys iām a 17 year old noob 
trying to learn how to combine ue4 and arduino i managed to download the UE4duino plugin succesfullly but i canāt get it to work.
i tried to control the light intensity of a point light with a potentiometer and i kind of get it to work but i get a lot off random values because some values are split in two frames for example if i have the value 255 unreal reads it as 25 and 5. i simply canāt solve it i have read the whole forum for a simple and clear answer but i canāt find one i hoope you guys can help me 
ps: iām using an arduino uno and UE4.21.2
greetings Kenneth
(Sorry for the bad english)
Iām ultra busy 'til June, so Iāll have to be brief.
Youāll send the commands from Arduino to Unreal using Serial.writeXXX methods. Te read them in Unreal using the Serial class, call the ReadXXX functions. To send stuff to Arduino, call the Print or Write methods. And, for working with more than a single variable simultaneously, search this thread for protocol.
Donāt use strings to exchange numbers. Youād need some synchronization algorithm for that to work nicely. If your values are in bytes, just use Serial.writeByte to send it to Unreal and, in Unreal, call ReadByte from the Serial class to read them. And always call Flush after reading because Arduino will likely send data much faster than Unreal will be reading it.
Is an amazing plug in for prototype interaction with unreal
Iām having an issue with the version of the plug in for the version of unreal 4.22.2 I dont know if this is the best place for ask for help. or recomendations about my issues.
please let me know if this is the best place for place my question and obtain help.
In the past I used succesfully the plugin in version 4.19 but now Iām trying to open the old files or create new projects with the plug-in and the system shows me the following message:
the following modules are missing or build with a different engine version :
UE4Duino.
and them the engine ask for rebuild and a new message appear that I need rebuild from the source manually.
is the same problem if I try to create a new project an install the plug in in a old project.
Is a way to update the plug-in that works with unreal version 4.22.2?
thanks
and thanks for keep this amazing plug in updated.
Hey huys, Can someone help me with my problem? I have difficulties to read a vector from the serial port of the ardiuno, Iām using a MPU-6050. I have no idea about how I can use that values.
same problem here. Plugin donāt work with 4.22.2 versions of unreal. any kind of help ?
Are you planing to update the plugin to Unreal version 4.22.2 any time soon?
Everytime I try to lunch 4.22.2 with the plugin version 2.2.4 it is not working and I canāt
open the project.
Guys, Iām working abroad and I am very busy. Iāll try to update it soon, but most likely Iāll only do it when Iām back home, after the June 8th.
If you have Visual Studio installed, you can get the source of the plugin, put it in the plugins folder and let the engine compile it for you.
Thanks for the answer .
I managed to make it work with strings using a whileloop and some other stuff now i can even send stuff back to the arduino without lag i can also plug my arduino in any com port i want but if i pull it back out while running the game and i plug it back in it doesnĀ“t work anymore so i hope someone has an idea to solve it, i tried with āis port openā but that doesnĀ“t work at all 
ps: LOVE UE4Duino:p and thanks for the effort
Hello, I try a very simple example but no success: (Arduino and ue4 communication is tested and works ok)
I want to press the Keyboard Z in Unreal - then it will turn the built-in Bulb of Arduino On. here is my code, any advice? thanks
Arduino code:
long mydata = 0;
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
}
void loop() {
while (Serial.available() == 0) {}
mydata = Serial.parseInt();
if (mydata==1) {
digitalWrite(LED_BUILTIN, HIGH); } // turn the LED on (HIGH is the voltage level)
// wait for a second
}
UE4 Code :
Hej hello. Everytime I update my engine version your plugin isnt working. Could you please solve that problem. Or be clear about the fact that that it works with 4.22 and not 4.22.1, 4.22.2, 4.22.3. Because then I wouldnt be updating in the first place. Just changing engine versions in the Uplugin file doesnt work. Tryed it several timesā¦
Doesnāt work how? Does it not open ports? Do you get an error message? Please, be specific so that I can try to help.
Everything looks correct to me. How did you confirm that Arduino and UE4 comms are working? What if you send back to Unreal the int that Arduino receives from Serial.parseInt() to check what itās getting?
ŠŠ“ŃŠ°ŃŃŠ²ŃŠ¹ŃŠµ. ŠŃŠ“ŠµŃ Š»Šø ŃŠµŠ»ŠøŠ· ŠæŠ¾Š“ Š²ŠµŃŃŠøŃ 4.22.3?
Something like this: Plugin was made with different engine version, would you like to rebuild, port 3 could not be opened, try rebuilding from source, UE4.22.3 stops loading. It is/was always like that. Many projects are blueprint only and Thusā¦ No visual studio installed. If it was build with 4.22.3 instead of 4.22.0 my guess would be that the plugin would work. Anyway I have a lot of fun with your plugin!! VR worlds with wind and smell are great I will just stick with my 4.20 version.
I see. Unfortunately, thatās one of the quirks of using code plugins in UE4. I canāt do anything about it. 
The plugin is compiled against that specific UE4 versionās dlls, so for each update, you need to rebuild the plugin. Sometimes (rarely) you also need to make code changes because of changes in the engine.
But as long as you have the source and VS installed, you can just click Yes when Unreal asks you to rebuild it. And if it complains about the version of the plugin, just delete the line that says the engine version in the .uplugin file for the plugin.
I strongly suggest you install VS, even if itās just for that. You might need it more times in the future. Install the 2019 Community version (free) following these guidelines and youāll be good to go.