// -------------------------------------- // i2c_scanner // http://playground.arduino.cc/Main/I2cScanner // // Version 1 // This program (or code that looks like it) // can be found in many places. // For example on the Arduino.cc forum. // The original author is not know. // Version 2, Juni 2012, Using Arduino 1.0.1 // Adapted to be as simple as possible by Arduino.cc user Krodal // Version 3, Feb 26 2013 // V3 by louarnold // Version 4, March 3, 2013, Using Arduino 1.0.3 // by Arduino.cc user Krodal. // Changes by louarnold removed. // Scanning addresses changed from 0...127 to 1...119, // according to the i2c scanner by Nick Gammon // http://www.gammon.com.au/forum/?id=10896 // Version 5, March 28, 2013 // As version 4, but address scans now to 127. // A sensor seems to use address 120. // Version 6, November 27, 2015. // Added waiting for the Leonardo serial communication. // // // This sketch tests the standard 7-bit addresses // Devices with higher bit address might not be seen properly. // #include void setup() { // uncomment these to use alternate pins //Wire.setSCL(16); //Wire.setSDA(17); Wire.begin(); Serial.begin(9600); while (!Serial); // Leonardo: wait for serial monitor Serial.println(F("\nI2C Scanner")); } void loop() { byte error, address; int nDevices; Serial.println(F("Scanning...")); nDevices = 0; for (address = 1; address < 127; 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) { Serial.print(F("Device found at address 0x")); if (address < 16) { Serial.print("0"); } Serial.print(address,HEX); Serial.print(" ("); printKnownChips(address); Serial.println(")"); nDevices++; } else if (error==4) { Serial.print(F("Unknown error at address 0x")); if (address < 16) { Serial.print("0"); } Serial.println(address,HEX); } } if (nDevices == 0) { Serial.println(F("No I2C devices found\n")); } else { Serial.println(F("done\n")); } delay(5000); // wait 5 seconds for next scan } void printKnownChips(byte address) { // Is this list missing part numbers for chips you use? // Please suggest additions here: // https://github.com/PaulStoffregen/Wire/issues/new switch (address) { case 0x00: Serial.print(F("AS3935")); break; case 0x01: Serial.print(F("AS3935")); break; case 0x02: Serial.print(F("AS3935")); break; case 0x03: Serial.print(F("AS3935")); break; case 0x0A: Serial.print(F("SGTL5000")); break; // MCLK required case 0x0B: Serial.print(F("SMBusBattery?")); break; case 0x0C: Serial.print(F("AK8963")); break; case 0x10: Serial.print(F("CS4272")); break; case 0x11: Serial.print(F("Si4713")); break; case 0x13: Serial.print(F("VCNL4000,AK4558")); break; case 0x18: Serial.print(F("LIS331DLH")); break; case 0x19: Serial.print(F("LSM303,LIS331DLH")); break; case 0x1A: Serial.print(F("WM8731")); break; case 0x1C: Serial.print(F("LIS3MDL")); break; case 0x1D: Serial.print(F("LSM303D,LSM9DS0,ADXL345,MMA7455L,LSM9DS1,LIS3DSH")); break; case 0x1E: Serial.print(F("LSM303D,HMC5883L,FXOS8700,LIS3DSH")); break; case 0x20: Serial.print(F("MCP23017,MCP23008,PCF8574,FXAS21002,SoilMoisture")); break; case 0x21: Serial.print(F("MCP23017,MCP23008,PCF8574")); break; case 0x22: Serial.print(F("MCP23017,MCP23008,PCF8574")); break; case 0x23: Serial.print(F("MCP23017,MCP23008,PCF8574")); break; case 0x24: Serial.print(F("MCP23017,MCP23008,PCF8574")); break; case 0x25: Serial.print(F("MCP23017,MCP23008,PCF8574")); break; case 0x26: Serial.print(F("MCP23017,MCP23008,PCF8574")); break; case 0x27: Serial.print(F("MCP23017,MCP23008,PCF8574,LCD16x2,DigoleDisplay")); break; case 0x28: Serial.print(F("BNO055,EM7180,CAP1188")); break; case 0x29: Serial.print(F("TSL2561,VL6180,TSL2561,TSL2591,BNO055,CAP1188")); break; case 0x2A: Serial.print(F("SGTL5000,CAP1188")); break; case 0x2B: Serial.print(F("CAP1188")); break; case 0x2C: Serial.print(F("MCP44XX ePot")); break; case 0x2D: Serial.print(F("MCP44XX ePot")); break; case 0x2E: Serial.print(F("MCP44XX ePot")); break; case 0x2F: Serial.print(F("MCP44XX ePot")); break; case 0x30: Serial.print(F("Si7210")); break; case 0x31: Serial.print(F("Si7210")); break; case 0x32: Serial.print(F("Si7210")); break; case 0x33: Serial.print(F("MAX11614,MAX11615,Si7210")); break; case 0x34: Serial.print(F("MAX11612,MAX11613")); break; case 0x35: Serial.print(F("MAX11616,MAX11617")); break; case 0x38: Serial.print(F("RA8875,FT6206,MAX98390")); break; case 0x39: Serial.print(F("TSL2561, APDS9960")); break; case 0x3C: Serial.print(F("SSD1306,DigisparkOLED")); break; case 0x3D: Serial.print(F("SSD1306")); break; case 0x40: Serial.print(F("PCA9685,Si7021,MS8607")); break; case 0x41: Serial.print(F("STMPE610,PCA9685")); break; case 0x42: Serial.print(F("PCA9685")); break; case 0x43: Serial.print(F("PCA9685")); break; case 0x44: Serial.print(F("PCA9685, SHT3X")); break; case 0x45: Serial.print(F("PCA9685, SHT3X")); break; case 0x46: Serial.print(F("PCA9685")); break; case 0x47: Serial.print(F("PCA9685")); break; case 0x48: Serial.print(F("ADS1115,PN532,TMP102,LM75,PCF8591")); break; case 0x49: Serial.print(F("ADS1115,TSL2561,PCF8591")); break; case 0x4A: Serial.print(F("ADS1115,Qwiic Keypad")); break; case 0x4B: Serial.print(F("ADS1115,TMP102,BNO080,Qwiic Keypad")); break; case 0x50: Serial.print(F("EEPROM,FRAM")); break; case 0x51: Serial.print(F("EEPROM")); break; case 0x52: Serial.print(F("Nunchuk,EEPROM")); break; case 0x53: Serial.print(F("ADXL345,EEPROM")); break; case 0x54: Serial.print(F("EEPROM")); break; case 0x55: Serial.print(F("EEPROM")); break; case 0x56: Serial.print(F("EEPROM")); break; case 0x57: Serial.print(F("EEPROM")); break; case 0x58: Serial.print(F("TPA2016,MAX21100")); break; case 0x5A: Serial.print(F("MPR121")); break; case 0x60: Serial.print(F("MPL3115,MCP4725,MCP4728,TEA5767,Si5351")); break; case 0x61: Serial.print(F("MCP4725,AtlasEzoDO")); break; case 0x62: Serial.print(F("LidarLite,MCP4725,AtlasEzoORP")); break; case 0x63: Serial.print(F("MCP4725,AtlasEzoPH")); break; case 0x64: Serial.print(F("AtlasEzoEC")); break; case 0x66: Serial.print(F("AtlasEzoRTD")); break; case 0x68: Serial.print(F("DS1307,DS3231,MPU6050,MPU9050,MPU9250,ITG3200,ITG3701,LSM9DS0,L3G4200D")); break; case 0x69: Serial.print(F("MPU6050,MPU9050,MPU9250,ITG3701,L3G4200D")); break; case 0x6A: Serial.print(F("LSM9DS1")); break; case 0x6B: Serial.print(F("LSM9DS0")); break; case 0x6F: Serial.print(F("Qwiic Button")); break; case 0x70: Serial.print(F("HT16K33")); break; case 0x71: Serial.print(F("SFE7SEG,HT16K33")); break; case 0x72: Serial.print(F("HT16K33")); break; case 0x73: Serial.print(F("HT16K33")); break; case 0x76: Serial.print(F("MS5607,MS5611,MS5637,BMP280")); break; case 0x77: Serial.print(F("BMP085,BMA180,BMP280,MS5611")); break; case 0x7C: Serial.print(F("FRAM_ID")); break; default: Serial.print(F("unknown chip")); } }