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Adding I2C Scanner for faster config
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// -------------------------------------- | ||
// i2c_scanner | ||
// | ||
// 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 | ||
// https://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. | ||
// | ||
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#include <Wire.h> | ||
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void setup() | ||
{ | ||
Wire.begin(); | ||
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Serial.begin(9600); | ||
while (!Serial); // Leonardo: wait for serial monitor | ||
Serial.println("\nI2C Scanner"); | ||
} | ||
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void loop() | ||
{ | ||
byte error, address; | ||
int nDevices; | ||
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Serial.println("Scanning..."); | ||
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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(); | ||
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if (error == 0) | ||
{ | ||
Serial.print("I2C device found at address 0x"); | ||
if (address<16) | ||
Serial.print("0"); | ||
Serial.print(address,HEX); | ||
Serial.println(" !"); | ||
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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\n"); | ||
else | ||
Serial.println("done\n"); | ||
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delay(5000); // wait 5 seconds for next scan | ||
} |