In one source code,how to control I2C0 and I2C1 for SunFounder I2C LCD2004

[YSDK001]

I learned how to control I2C1 of pico W for SunFounder I2C LCD2004 by #2737 thread of this arduino-pico Discussion. Of cource this libray can control I2C0 of pico W for SunFounder I2C LCD2004.
But I recently noticed that the SunFounder I2C LCD2004 connected to port I2C0 of pico W and the the SunFounder I2C LCD2004 connected to I2C1 of pico W do not work well in one source code, named "Code for I2C0 & I2C1". The SunFounder I2C LCD2004 which is connected to I2C1, shows Alternately every 2 seconds
one mode
0: I2C1 0x27 Num=xxx
1: I2C1 0x27 Num=xxx
2: I2C1 0x27 Num=xxx
3: I2C1 0x27 Num=xxx

the other mode
0:
1:
2:
3:

xxx means Count Number
Count Number increses every 2 secnds.

But The SunFounder I2C LCD2004 which is connected to I2C0 shows nothing.
Why doesn't The SunFounderI2C LCD2004 connected to I2C0 work ? How do you control the SunFounder I2C LCD2004 connected to I2C0 ?
Any advise make me pleased.

Please See attached Pictures(mode1_I2C0_I2C1.JPG and mode2_I2C0_I2C1.JPG) Also I attached zip of "Code for I2C0 & I2C1" ino file, LiquidCrystal_I2C.h and LiquidCrystal_I2C.cpp.(= 4c_I2C0_I2C1picoW_even_Just_updated.zip)



4c_I2C0_I2C1picoW_even_Just_updated.zip

I added below.

1. "Code for I2C0" works well, namely shows Alternately every 2 seconds.
   In "Code for I2C0" pico W controls only I2C0 port.
   one mode
   0: I2C0 0x27 Num=xxx
   1: I2C0 0x27 Num=xxx
   2: I2C0 0x27 Num=xxx
   3: I2C0 0x27 Num=xxx

the other mode
0:
1:
2:
3:

2. "Code for I2C1" works well, namely shows Alternately every 2 seconds.
   In "Code for I2C1" pico W controls only I2C1 port.
   one mode
   0: I2C1 0x27 Num=xxx
   1: I2C1 0x27 Num=xxx
   2: I2C1 0x27 Num=xxx
   3: I2C1 0x27 Num=xxx

the other mode
0:
1:
2:
3:

//Code for I2C0 & I2C1 ---------------------------------------------------------
#include <Wire.h>
//#include <LiquidCrystal_I2C.h>
#include "LiquidCrystal_I2C.h"

int exLED = 0;
int Num = 0;
char Buf[32];

LiquidCrystal_I2C lcd0(0x27, 20, 4);
LiquidCrystal_I2C lcd1(0x27, 20, 4);

void setup()
{
pinMode(exLED, OUTPUT); //Led port: out

// I2C0 pin Setting
Wire.setSDA(16); //pin21 (GP16 I2C0 SDA)
Wire.setSCL(17); //pin22 (GP17 I2C0 SCL)
Wire.begin(); //
lcd0.begin2(Wire);
lcd0.backlight();

// I2C1 pin Setting
Wire1.setSDA(18); //pin24 (GP18 I2C1 SDA)
Wire1.setSCL(19); //pin25 (GP19 I2C1 SCL)
Wire1.begin(); //
lcd1.begin2(Wire1);
lcd1.backlight();

}
void loop()
{
Num++;
lcd0.setCursor(0,0);
sprintf(Buf,"0: I2C0 0x27 Num=%d", Num);
lcd0.print(Buf);
lcd0.setCursor(0,1);
sprintf(Buf,"1: I2C0 0x27 Num=%d", Num);
lcd0.print(Buf);
lcd0.setCursor(0,2);
sprintf(Buf,"2: I2C0 0x27 Num=%d", Num);
lcd0.print(Buf);
lcd0.setCursor(0,3);
sprintf(Buf,"3: I2C0 0x27 Num=%d", Num);
lcd0.print(Buf);

lcd1.setCursor(0,0);
sprintf(Buf,"0: I2C1 0x27 Num=%d", Num);
lcd1.print(Buf);
lcd1.setCursor(0,1);
sprintf(Buf,"1: I2C1 0x27 Num=%d", Num);
lcd1.print(Buf);
lcd1.setCursor(0,2);
sprintf(Buf,"2: I2C1 0x27 Num=%d", Num);
lcd1.print(Buf);
lcd1.setCursor(0,3);
sprintf(Buf,"3: I2C1 0x27 Num=%d", Num);
lcd1.print(Buf);

digitalWrite(exLED, HIGH); //No1 Pin LED：On
delay(2000);

digitalWrite(exLED, LOW); //No1 Pin LED：Off

lcd0.setCursor(0,0);
lcd0.print("0: ");
lcd0.setCursor(0,1);
lcd0.print("1: ");
lcd0.setCursor(0,2);
lcd0.print("2: ");
lcd0.setCursor(0,3);
lcd0.print("3: ");

lcd1.setCursor(0,0);
lcd1.print("0: ");
lcd1.setCursor(0,1);
lcd1.print("1: ");
lcd1.setCursor(0,2);
lcd1.print("2: ");
lcd1.setCursor(0,3);
lcd1.print("3: ");

delay(2000);
}

//Code for I2C0 ---------------------------------------------------------
#include <Wire.h>
//#include <LiquidCrystal_I2C.h>
#include "LiquidCrystal_I2C.h"

int exLED = 0;
int Num = 0;
char Buf[32];

LiquidCrystal_I2C lcd0(0x27, 20, 4);
//LiquidCrystal_I2C lcd1(0x27, 20, 4);

void setup()
{
pinMode(exLED, OUTPUT); //Led port: out

// I2C0 pin Setting
Wire.setSDA(16); //pin21 (GP16 I2C0 SDA)
Wire.setSCL(17); //pin22 (GP17 I2C0 SCL)
Wire.begin(); //
lcd0.begin2(Wire);
lcd0.backlight();

// // I2C1 pin Setting
// Wire1.setSDA(18); //pin24 (GP18 I2C1 SDA)
// Wire1.setSCL(19); //pin25 (GP19 I2C1 SCL)
// Wire1.begin(); //
// lcd1.begin2(Wire1);
// lcd1.backlight();

}
void loop()
{
Num++;
lcd0.setCursor(0,0);
sprintf(Buf,"0: I2C0 0x27 Num=%d", Num);
lcd0.print(Buf);
lcd0.setCursor(0,1);
sprintf(Buf,"1: I2C0 0x27 Num=%d", Num);
lcd0.print(Buf);
lcd0.setCursor(0,2);
sprintf(Buf,"2: I2C0 0x27 Num=%d", Num);
lcd0.print(Buf);
lcd0.setCursor(0,3);
sprintf(Buf,"3: I2C0 0x27 Num=%d", Num);
lcd0.print(Buf);

// lcd1.setCursor(0,0);
// sprintf(Buf,"0: I2C1 0x27 Num=%d", Num);
// lcd1.print(Buf);
// lcd1.setCursor(0,1);
// sprintf(Buf,"1: I2C1 0x27 Num=%d", Num);
// lcd1.print(Buf);
// lcd1.setCursor(0,2);
// sprintf(Buf,"2: I2C1 0x27 Num=%d", Num);
// lcd1.print(Buf);
// lcd1.setCursor(0,3);
// sprintf(Buf,"3: I2C1 0x27 Num=%d", Num);
// lcd1.print(Buf);

digitalWrite(exLED, HIGH); //No1 Pin LED：On
delay(2000);

digitalWrite(exLED, LOW); //No1 Pin LED：Off

lcd0.setCursor(0,0);
lcd0.print("0: ");
lcd0.setCursor(0,1);
lcd0.print("1: ");
lcd0.setCursor(0,2);
lcd0.print("2: ");
lcd0.setCursor(0,3);
lcd0.print("3: ");

// lcd1.setCursor(0,0);
// lcd1.print("0: ");
// lcd1.setCursor(0,1);
// lcd1.print("1: ");
// lcd1.setCursor(0,2);
// lcd1.print("2: ");
// lcd1.setCursor(0,3);
// lcd1.print("3: ");

delay(2000);
}

//Code for I2C1 ---------------------------------------------------------
#include <Wire.h>
//#include <LiquidCrystal_I2C.h>
#include "LiquidCrystal_I2C.h"

int exLED = 0;
int Num = 0;
char Buf[32];

//LiquidCrystal_I2C lcd0(0x27, 20, 4);
LiquidCrystal_I2C lcd1(0x27, 20, 4);

void setup()
{
pinMode(exLED, OUTPUT); //Led port: out

// // I2C0 pin Setting
// Wire.setSDA(16); //pin21 (GP16 I2C0 SDA)
// Wire.setSCL(17); //pin22 (GP17 I2C0 SCL)
// Wire.begin(); //
// lcd0.begin2(Wire);
// lcd0.backlight();

// I2C1 pin Setting
Wire1.setSDA(18); //pin24 (GP18 I2C1 SDA)
Wire1.setSCL(19); //pin25 (GP19 I2C1 SCL)
Wire1.begin(); //
lcd1.begin2(Wire1);
lcd1.backlight();

}
void loop()
{
Num++;
// lcd0.setCursor(0,0);
// sprintf(Buf,"0: I2C0 0x27 Num=%d", Num);
// lcd0.print(Buf);
// lcd0.setCursor(0,1);
// sprintf(Buf,"1: I2C0 0x27 Num=%d", Num);
// lcd0.print(Buf);
// lcd0.setCursor(0,2);
// sprintf(Buf,"2: I2C0 0x27 Num=%d", Num);
// lcd0.print(Buf);
// lcd0.setCursor(0,3);
// sprintf(Buf,"3: I2C0 0x27 Num=%d", Num);
// lcd0.print(Buf);

lcd1.setCursor(0,0);
sprintf(Buf,"0: I2C1 0x27 Num=%d", Num);
lcd1.print(Buf);
lcd1.setCursor(0,1);
sprintf(Buf,"1: I2C1 0x27 Num=%d", Num);
lcd1.print(Buf);
lcd1.setCursor(0,2);
sprintf(Buf,"2: I2C1 0x27 Num=%d", Num);
lcd1.print(Buf);
lcd1.setCursor(0,3);
sprintf(Buf,"3: I2C1 0x27 Num=%d", Num);
lcd1.print(Buf);

digitalWrite(exLED, HIGH); //No1 Pin LED：On
delay(2000);

digitalWrite(exLED, LOW); //No1 Pin LED：Off

// lcd0.setCursor(0,0);
// lcd0.print("0: ");
// lcd0.setCursor(0,1);
// lcd0.print("1: ");
// lcd0.setCursor(0,2);
// lcd0.print("2: ");
// lcd0.setCursor(0,3);
// lcd0.print("3: ");

lcd1.setCursor(0,0);
lcd1.print("0: ");
lcd1.setCursor(0,1);
lcd1.print("1: ");
lcd1.setCursor(0,2);
lcd1.print("2: ");
lcd1.setCursor(0,3);
lcd1.print("3: ");

delay(2000);
}