"Broken pipe" error using appinventor2

[Òscar Lorente]

Hi! 

First of all, my english level is quite limited so i'm sorry if something is written wrong.

I'm trying to "program" an app to control a motor with a joystick using appinventor2.

When i test it with a basic Arduino code to watch the x and y variations on the Serial Monitor everything is going well until 1 minute later the app suddenly stops running and a "Broken pipe" error is shown. 

I've been reading in many forums and it seems to be a problem related to bluetooth connection but i don't know how to solve it. 

Bluetooth module HC-05 velleman : https://www.jameco.com/Jameco/Products/ProdDS/2255146UsersManual.pdf

Maybe the main problem comes from the baud rate of HC - 05 module, so I'd like to know the needed configuration and if it could be the problem.

I've attached the appivnentor2 blocks.

Here's my Arduino code:

void setup() {

  Serial.begin(38400);

}

void loop() {

  if (Serial.available() >= 1) {

    int x = Serial.read();

    delay(25); //Don't know if that is necessary

    int y = Serial.read();

    Serial.print("x:");

    Serial.print(x);

    Serial.print("\n");

    Serial.print("y:");

    Serial.print(y);

    Serial.print("\n"); 

    }

}

Thanks!

[Òscar Lorente]

By the way, here's the bluetooth module-Arduino connection.

[Òscar Lorente]

It seems that if i keep the "Serial.read(38400)" line in Arduino but configure the HC-05 to 9600 b/s i don't get the error message but i'm always receiving the number "120, 248, -1 or 0" on my Serial Monitor. 

Okay. also the "broken pipe" error but it took me more minuts to get it.

[Abraham Getzler]

Did you use this board's search for broken pipe ?

ABG

[Òscar Lorente]

Yep, nothing helped. 

Instead of trying to avoid the problem, I'm looking for another alternative, such as reconnect bluetooth connection between the module and my mobile if the error occurs (with a "When Screen1.Error Ocurred: If getErrorNumber=516...") but the problem is that just before it disconnects from the BT module and the 516 error appears the app starts to slow down for about 10 seconds. So I tried to also avoid that by implementing a block that reconects BT connection if I shake the mobile, but it doesn't work (it only disconnects from the BT module).