- #include "Wire.h"
- void setup() {
- Serial.begin(115200);
- Wire.begin();
- }
- void loop() {
- byte error, address;
- int nDevices = 0;
- delay(5000);
- Serial.println("Scanning for I2C devices ...");
- for(address = 0x01; address < 0x7f; address++){
- Wire.beginTransmission(address);
- error = Wire.endTransmission();
- if (error == 0){
- Serial.printf("I2C device found at address 0x%02X\n", address);
- nDevices++;
- } else if(error != 2){
- Serial.printf("Error %d at address 0x%02X\n", error, address);
- }
- }
- if (nDevices == 0){
- Serial.println("No I2C devices found");
- }
- }
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