Two adruino are connected to the raspberry via usb, but one is reconnected during processing code is running

I try to solve this a month..but still problem...

I want to make below led-matrix spectrum.

Thumbnail image

https://youtu.be/X35HbE7k3DA

※Environment

Device UML

One Raspberry pi 3 : 2019-09-26-raspbian-buster-full

Two arduino uno with each matrix shield and 16x32 matrix

One usb Microphone

If i attached two arduino Uno to raspberry pi and try to run Processing code(.pde) , one of them is reattached to raspberry pi.

The other one is still working well..

If i connect these arduinos to windows and running pde file...It works well. (two matrix are showing spectrum well)

What should I do??? Is this code problem? or raspberry problem?

I really need to solve this...

I already tried....

1. Reloaded ino code to both arduino Uno. (both arduino has same code)

2. Changed boardrate number 115200 -> other number (but it must be 115200 to running well)

3. Add arduino to udev rules like below link. https://www.intorobotics.com/how-to-setup-raspberry-pi-to-identify-two-arduino-devices/

4. Cross exchange each matrix and arduino.

5. Try to use arduino mega with same code.

   
   
   

Here is the arduino code(.ino) and Processing Code(.pde) https://github.com/snskreationz/Real-Time-RGB-Matrix-Spectrum-Analyzer

arduino Uno Matrix Pin number

#define CLK 8
#define LAT 10
#define OE  9
#define A   A0
#define B   A1
#define C   A2

Main processing code

import ddf.minim.analysis.*;
import ddf.minim.*;
import processing.serial.*; 

Serial port1; 
Serial port2;

Minim minim;
AudioInput in;
FFT fft;

int buffer_size = 4096; 
float sample_rate = 200000;

int freq_width = 250; // <-O-> set the frequency range for each band over 400hz. larger bands will have less intensity per band. smaller bands would result in the overall range being limited

//arrays to hold the 64 bands' data
int[] freq_array = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
float[] freq_height = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

void setup()
{
  size(200, 200);

  minim = new Minim(this);
  port1 = new Serial(this, "COM8" , 115200); // <-O-> set baud rate and port for first RGB matrix
// Here can be changed to "/dev/ttyACM0" via Raspberry pi
  //port2 = new Serial(this, "COM5" , 115200); // <-O-> set baud rate and port for second RGB matrix
// Here can be changed to "/dev/ttyACM1" via Raspberry pi

  in = minim.getLineIn(Minim.MONO,buffer_size,sample_rate);

  // create an FFT object that has a time-domain buffer 
  // the same size as line-in's sample buffer
  fft = new FFT(in.bufferSize(), in.sampleRate());
  // Tapered window important for log-domain display
  fft.window(FFT.HAMMING);
}

Here are the kernel logs for Raspebrry pi

Nov 11 00:17:27 raspberrypi kernel: [ 5974.165722] Under-voltage detected! (0x00050005)
Nov 11 00:17:27 raspberrypi kernel: [ 5974.665649] usb 1-1.3: new full-speed USB device number 9 using dwc_otg
Nov 11 00:17:27 raspberrypi kernel: [ 5974.809539] usb 1-1.3: New USB device found, idVendor=2341, idProduct=0043, bcdDevice= 0.01
Nov 11 00:17:27 raspberrypi kernel: [ 5974.809556] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=220
Nov 11 00:17:27 raspberrypi kernel: [ 5974.809566] usb 1-1.3: Manufacturer: Arduino (www.arduino.cc)
Nov 11 00:17:27 raspberrypi kernel: [ 5974.809576] usb 1-1.3: SerialNumber: 55639313932351518040
Nov 11 00:17:27 raspberrypi kernel: [ 5974.810729] cdc_acm 1-1.3:1.0: ttyACM0: USB ACM device ---------------------> connected first arduino
Nov 11 00:17:28 raspberrypi kernel: [ 5975.685661] usb 1-1.2: new full-speed USB device number 10 using dwc_otg
Nov 11 00:17:28 raspberrypi kernel: [ 5975.829541] usb 1-1.2: New USB device found, idVendor=2341, idProduct=0043, bcdDevice= 0.01
Nov 11 00:17:28 raspberrypi kernel: [ 5975.829558] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=220
Nov 11 00:17:28 raspberrypi kernel: [ 5975.829569] usb 1-1.2: Manufacturer: Arduino (www.arduino.cc)
Nov 11 00:17:28 raspberrypi kernel: [ 5975.829578] usb 1-1.2: SerialNumber: 8563431373935121D0B2
Nov 11 00:17:28 raspberrypi kernel: [ 5975.830752] cdc_acm 1-1.2:1.0: ttyACM1: USB ACM device --------------------->  connected second arduino
Nov 11 00:17:33 raspberrypi kernel: [ 5980.405877] Voltage normalised (0x00000000) --------------------->  almost at this time starting processing code
Nov 11 00:17:37 raspberrypi kernel: [ 5985.121964] usb 1-1.2: USB disconnect, device number 10
Nov 11 00:17:37 raspberrypi kernel: [ 5985.122315] cdc_acm 1-1.2:1.0: failed to set dtr/rts
Nov 11 00:17:38 raspberrypi kernel: [ 5985.425669] usb 1-1.2: new full-speed USB device number 11 using dwc_otg
Nov 11 00:17:38 raspberrypi kernel: [ 5985.569812] usb 1-1.2: New USB device found, idVendor=2341, idProduct=0043, bcdDevice= 0.01
Nov 11 00:17:38 raspberrypi kernel: [ 5985.569831] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=220
Nov 11 00:17:38 raspberrypi kernel: [ 5985.569843] usb 1-1.2: Manufacturer: Arduino (www.arduino.cc)
Nov 11 00:17:38 raspberrypi kernel: [ 5985.569853] usb 1-1.2: SerialNumber: 8563431373935121D0B2
Nov 11 00:17:38 raspberrypi kernel: [ 5985.571468] cdc_acm 1-1.2:1.0: ttyACM2: USB ACM device --------------------->  reattached second arduino automatically
Nov 11 00:17:39 raspberrypi kernel: [ 5986.645829] Under-voltage detected! (0x00050005)
Nov 11 00:17:43 raspberrypi kernel: [ 5990.805775] Voltage normalised (0x00000000)

I really want to run both arduino spectrum via raspberry pi.