How to connect multiple Led panel

[tientruong611]

I have a problem with led panel , as instruction we connect PI with PO at 1 label , but if we have 2 panel we have to connect PO at panel 1 to PI panel 2 , so where can i connect 5 wires R2 G1 G2 B1 B2 of led panel 1

PI | PO

R2 | R1
G1 | R2
G2 | G1
B1 | G2
B2 | B1

[tientruong611]

i fix that , we have to connect PO of led panel 1 to led panel 2 and 5 wires connect with PO of led panel 2. but i have a new problem with flick on my panel how can i fix that , this is my code
#include <PxMatrix.h>
#include <Ticker.h>
Ticker display_ticker;
#define P_LAT 22
#define P_A 19
#define P_B 23
#define P_C 18
#define P_D 5
#define P_OE 16
hw_timer_t * timer = NULL;
portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED;
#define matrix_width 128
#define matrix_height 32
uint8_t display_draw_time=10; //30-70 is usually fine

PxMATRIX display(matrix_width, matrix_height, P_LAT, P_OE, P_A, P_B, P_C, P_D);

// Some standard colors
uint16_t myRED = display.color565(255, 0, 0);
uint16_t myGREEN = display.color565(0, 255, 0);
uint16_t myBLUE = display.color565(0, 0, 255);
uint16_t myWHITE = display.color565(255, 255, 255);
uint16_t myYELLOW = display.color565(255, 255, 0);
uint16_t myCYAN = display.color565(0, 255, 255);
uint16_t myMAGENTA = display.color565(255, 0, 255);
uint16_t myBLACK = display.color565(0, 0, 0);

#ifdef ESP32
void IRAM_ATTR display_updater(){
// Increment the counter and set the time of ISR
portENTER_CRITICAL_ISR(&timerMux);
display.display(display_draw_time);
portEXIT_CRITICAL_ISR(&timerMux);
}
#endif

void display_update_enable(bool is_enable)
{

#ifdef ESP32
if (is_enable)
{
timer = timerBegin(0, 80, true);
timerAttachInterrupt(timer, &display_updater, true);
timerAlarmWrite(timer, 4000, true);
timerAlarmEnable(timer);
}
else
{
timerDetachInterrupt(timer);
timerAlarmDisable(timer);
}
#endif
}
void setup() {
Serial.begin(9600);
display.begin(16);
display.setPanelsWidth(2);
display.clearDisplay();
display.setTextColor(myCYAN);
display.setCursor(2,0);
display.print("Pixel");
display.setTextColor(myMAGENTA);
display.setCursor(2,8);
display.print("Time");
display_update_enable(true);

delay(3000);
}

//void scroll_text(uint8_t ypos, unsigned long scroll_delay, String text, uint8_t colorR, uint8_t colorG, uint8_t colorB) {
// uint16_t text_length = text.length();
// display.setTextWrap(false);
// display.setTextSize(1);
// display.setRotation(0);
// display.setTextColor(display.color565(colorR, colorG, colorB));
//
// for (int xpos = matrix_width; xpos > -(matrix_width + text_length * 5); xpos--) {
// display.clearDisplay();
// display.setCursor(xpos, ypos);
// display.println(text);
// delay(scroll_delay);
// yield();
// }
//}

void display_text(uint8_t ypos,uint8_t xpos, String text, uint8_t colorR, uint8_t colorG, uint8_t colorB) {
uint16_t text_length = text.length();
display.setTextWrap(false);
display.setTextSize(1);
display.setRotation(0);
display.setTextColor(display.color565(colorR, colorG, colorB));
display.clearDisplay();
display.setCursor(xpos, ypos);
display.println(text);
yield();

}

void loop() {
// scroll_text(9, 50, "Welcome to PxMatrix!", 96, 96, 250);
display_text(9,3, "123456789", 96, 96, 250);
// delay(2000);
delay(2000); // Giữ màn hình đỏ trong 2 giây
display.setBrightness(255); // Tăng độ sáng lên mức tối đa
// display.fillScreen(display.color565(0, 255, 0)); // Màu xanh lá
delay(2000); // Giữ màn hình xanh trong 2 giây
}