62 lines
1.2 KiB
Arduino
62 lines
1.2 KiB
Arduino
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/* I2C SCANNER
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http://playground.arduino.cc/Main/I2cScanner
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This sketch tests the standard 7-bit addresses
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Devices with higher bit address might not be seen properly.
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*/
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#include <Wire.h>
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void setup()
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{
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Wire.begin();
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Serial.begin(9600);
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Serial.println("\nI2C Scanner");
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}
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void loop()
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{
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byte error, address;
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int nDevices;
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Serial.println("Scanning...");
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nDevices = 0;
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for(address = 1; address < 127; address++ )
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{
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// The i2c_scanner uses the return value of
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// the Write.endTransmisstion to see if
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// a device did acknowledge to the address.
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Wire.beginTransmission(address);
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error = Wire.endTransmission();
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if (error == 0)
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{
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Serial.print("I2C device found at address 0x");
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if (address<16)
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Serial.print("0");
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Serial.print(address,HEX);
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Serial.println(" !");
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nDevices++;
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}
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else if (error==4)
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{
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Serial.print("Unknow error at address 0x");
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if (address<16)
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Serial.print("0");
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Serial.println(address,HEX);
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}
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}
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if (nDevices == 0)
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Serial.println("No I2C devices found\n");
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else
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Serial.println("done\n");
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delay(5000); // wait 5 seconds for next scan
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}
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