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/**
Arduino I2C Scanner
v. 1.0
Copyright (C) 2017 Robert Ulbricht
http://www.arduinoslovakia.eu
I2C Scanner inspired by Raspberry Pi.
IDE: 1.8.3 or higher
Board: Arduino Uno, Mega, Pro Mini
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <Wire.h>
void setup() {
Wire.begin();
Serial.begin(115200);
Serial.println("I2C Scanner");
}
void loop() {
uint8_t error, address, line = 1;
int nDevices = 0;
Serial.println(" 0 1 2 3 4 5 6 7 8 9 A B C D E F");
Serial.print ("00: ");
// https://learn.adafruit.com/i2c-addresses/the-list
for (address = 0x03; address < 0x78; address++ ) {
// The i2c_scanner uses the return value of
// the Write.endTransmisstion to see if
// a device did acknowledge to the address.
Wire.beginTransmission(address);
error = Wire.endTransmission();
if (error == 0) {
printHex(address);
nDevices++;
}
else if (error == 4)
Serial.print(" ER");
else
Serial.print(" --");
if ((address + 1) % 16 == 0) {
Serial.println();
Serial.print(line);
Serial.print("0:");
line++;
}
}
if (nDevices == 0)
Serial.println("\nNo I2C devices found\n");
else {
Serial.print("\nFound ");
Serial.print(nDevices);
Serial.println(" devices\n");
}
delay(5000); // wait 5 seconds for next scan
}
void printHex(uint8_t address) {
Serial.print(" ");
if (address < 16)
Serial.print("0");
Serial.print(address, HEX);
}