Error 516:Unable to write:Broken pipe (Bluetooth)(Arduino)(MIT App Inventor)

Projects Programming
1

I was trying to make this Arduino project where I would control a robotic arm using an app made with MIT App inventor via Bluetooth. I referred to the website- https://howtomechatronics.com/tutorials/arduino/diy-arduino-robot-arm-with-smartphone-control/ (blocks, and source code is there in the website)

The circuit, code all looks fine to me. The app consists of a slider controller, I move the robot arm based on the movement of slider controller.
The PROBLEM is that when I move the slider controller, the app crashes that is, it freezes and gives the following error- "Error 516:Unable to write:Broken pipe". I have observed that the bluetooth module(HC-05) I'm using starts disconnecting everytime I connect it, hence "broken pipe".

So, I would like to know is there any solution to fix it, if yes then please let me know it.

Thank You!

2

Hi.
It looks like something is causing the phone to disconnect from the HC-05. See what error you get if you remove power from the HC-05. There's also Error 515: Bluetooth not connected.

Check all the blocks in your app that call on Bluetooth client. Are you using the disconnect block anywhere?

A Bluetooth serial terminal app would be helpful. Do you have one installed on the phone?

John.