Code:
// Made by KinCony IoT: https://www.kincony.com
// This sketch scans two I2C buses and prints all detected device addresses.
// IIC Bus-1: SDA - GPIO48, SCL - GPIO47
// IIC Bus-2: SDA - GPIO12, SCL - GPIO11
#include <Wire.h>
// Create two I2C bus objects
TwoWire I2C_BUS1 = TwoWire(0);
TwoWire I2C_BUS2 = TwoWire(1);
// Scan function for a specific I2C bus
void scanI2CBus(TwoWire &bus, const char* busName) {
Serial.println();
Serial.print("Scanning ");
Serial.print(busName);
Serial.println(" at 100kHz...");
byte error, address;
int nDevices = 0;
for (address = 1; address < 127; address++) {
bus.beginTransmission(address);
error = bus.endTransmission();
if (error == 0) {
Serial.print("I2C device found at address 0x");
if (address < 16)
Serial.print("0");
Serial.print(address, HEX);
Serial.println(" ✓");
nDevices++;
} else if (error == 4) {
Serial.print("Unknown error at address 0x");
if (address < 16)
Serial.print("0");
Serial.println(address, HEX);
}
}
if (nDevices == 0)
Serial.println("No I2C devices found.");
else
Serial.println("Scan completed.");
}
void setup() {
Serial.begin(115200);
delay(1000); // Wait for serial to initialize
// Initialize IIC Bus-1 (GPIO48 = SDA, GPIO47 = SCL) at 100kHz
I2C_BUS1.begin(48, 47);
// Initialize IIC Bus-2 (GPIO12 = SDA, GPIO11 = SCL) at 100kHz
I2C_BUS2.begin(12, 11);
// Start scanning both buses
scanI2CBus(I2C_BUS1, "IIC Bus-1");
scanI2CBus(I2C_BUS2, "IIC Bus-2");
}
void loop() {
// Nothing to do in the loop
}
