Hi,

Im doing some college project with rgb matrix led 16x32 model p10-3535. The goal is to use phone app arduino bluetooth controller to send text on the matrix via bluetooth module.

My first step was to connect matrix to UNO and try to upload example code testshapes_16x32. (link from which i connected matrix: link)The matrix with that code should look like picture on the link, but mine is like in picture2.

Does anyone know what could be the problem?

Code:

```
#include <RGBmatrixPanel.h>
// Most of the signal pins are configurable, but the CLK pin has some
// special constraints. On 8-bit AVR boards it must be on PORTB...
// Pin 8 works on the Arduino Uno & compatibles (e.g. Adafruit Metro),
// Pin 11 works on the Arduino Mega. On 32-bit SAMD boards it must be
// on the same PORT as the RGB data pins (D2-D7)...
// Pin 8 works on the Adafruit Metro M0 or Arduino Zero,
// Pin A4 works on the Adafruit Metro M4 (if using the Adafruit RGB
// Matrix Shield, cut trace between CLK pads and run a wire to A4).
#define CLK 8 // USE THIS ON ARDUINO UNO, ADAFRUIT METRO M0, etc.
//#define CLK A4 // USE THIS ON METRO M4 (not M0)
//#define CLK 11 // USE THIS ON ARDUINO MEGA
#define OE 9
#define LAT 10
#define A A0
#define B A1
#define C A2
RGBmatrixPanel matrix(A, B, C, CLK, LAT, OE, false);
void setup() {
matrix.begin();
// draw a pixel in white
matrix.drawPixel(0, 0, matrix.Color333(7, 7, 7));
delay(500);
// fix the screen with green
matrix.fillRect(0, 0, 32, 16, matrix.Color333(0, 7, 0));
delay(500);
// draw a box in yellow
matrix.drawRect(0, 0, 32, 16, matrix.Color333(7, 7, 0));
delay(500);
// draw an 'X' in red
matrix.drawLine(0, 0, 31, 15, matrix.Color333(7, 0, 0));
matrix.drawLine(31, 0, 0, 15, matrix.Color333(7, 0, 0));
delay(500);
// draw a blue circle
matrix.drawCircle(7, 7, 7, matrix.Color333(0, 0, 7));
delay(500);
// fill a violet circle
matrix.fillCircle(23, 7, 7, matrix.Color333(7, 0, 7));
delay(500);
// fill the screen with black
matrix.fillScreen(matrix.Color333(0, 0, 0));
// draw some text!
matrix.setCursor(1, 0); // start at top left, with one pixel of spacing
matrix.setTextSize(1); // size 1 == 8 pixels high
// print each letter with a rainbow color
matrix.setTextColor(matrix.Color333(7,0,0));
matrix.print('1');
matrix.setTextColor(matrix.Color333(7,4,0));
matrix.print('6');
matrix.setTextColor(matrix.Color333(7,7,0));
matrix.print('x');
matrix.setTextColor(matrix.Color333(4,7,0));
matrix.print('3');
matrix.setTextColor(matrix.Color333(0,7,0));
matrix.print('2');
matrix.setCursor(1, 9); // next line
matrix.setTextColor(matrix.Color333(0,7,7));
matrix.print('*');
matrix.setTextColor(matrix.Color333(0,4,7));
matrix.print('R');
matrix.setTextColor(matrix.Color333(0,0,7));
matrix.print('G');
matrix.setTextColor(matrix.Color333(4,0,7));
matrix.print('B');
matrix.setTextColor(matrix.Color333(7,0,4));
matrix.print('*');
// whew!
}
void loop() {
// Do nothing -- image doesn't change
}
```