#include <Arduino.h>

#include <Wire.h>

#include <dummy.h> //for esp32

#define SDA1 21
#define SCL1 22
//#define SDA1 19
//#define SCL1 23

#define SDA2 4
#define SCL2 17

TwoWire I2Cone = TwoWire(0);
TwoWire I2Ctwo = TwoWire(1);

void scan1(){
Serial.println("Scanning I2C Addresses Channel 1");
uint8_t cnt=0;
for(uint8_t i=0;i<128;i++){
I2Cone.beginTransmission(i);
uint8_t ec=I2Cone.endTransmission(true);
if(ec==0){
if(i<16)Serial.print('0');
Serial.print(i,HEX);
cnt++;
}
else Serial.print("..");
Serial.print(' ');
if ((i&0x0f)==0x0f)Serial.println();
}
Serial.print("Scan Completed, ");
Serial.print(cnt);
Serial.println(" I2C Devices found.");
}

void scan2(){
Serial.println("Scanning I2C Addresses Channel 2");
uint8_t cnt=0;
for(uint8_t i=0;i<128;i++){
I2Ctwo.beginTransmission(i);
uint8_t ec=I2Ctwo.endTransmission(true);
if(ec==0){
if(i<16)Serial.print('0');
Serial.print(i,HEX);
cnt++;
}
else Serial.print("..");
Serial.print(' ');
if ((i&0x0f)==0x0f)Serial.println();
}
Serial.print("Scan Completed, ");
Serial.print(cnt);
Serial.println(" I2C Devices found.");
}

void setup(){
Serial.begin(115200);

I2Cone.begin(SDA1,SCL1,400000); // SDA pin 21, SCL pin 22 TTGO TQ
I2Ctwo.begin(SDA2,SCL2,400000); // SDA pin 5, SCL pin 4 builtin OLED

}
void loop(){

delay(500);
scan1();
Serial.println();
delay(500);

delay(500);
scan2();
Serial.println();

delay(2000);

}