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  1. #include <Wire.h>
  2.  
  3. void setup()
  4. {
  5.   Wire.begin();
  6.   Serial.begin(115200);
  7.   Serial.println("\nI2C Scanner");
  8. }
  9.  
  10.  
  11. void loop()
  12. {
  13.   i2c_check();
  14.   delay(2500);
  15. }
  16.  
  17. void i2c_check()
  18. {
  19.   byte error, address;
  20.   int nDevices;
  21.  
  22.   Serial.println("Scanning...");
  23.  
  24.   nDevices = 0;
  25.   for(address = 1; address < 127; address++ ) 
  26.   {
  27.     Wire.beginTransmission(address);
  28.     error = Wire.endTransmission();
  29.  
  30.     if (error == 0)
  31.     {
  32.       Serial.print("I2C device found at address 0x");
  33.       if (address<16) Serial.print("0");
  34.       Serial.print(address,HEX);
  35.       Serial.println("  !");
  36.  
  37.       nDevices++;
  38.     }
  39.     else if (error==4) 
  40.     {
  41.       Serial.print("Unknow error at address 0x");
  42.       if (address<16) Serial.print("0");
  43.       Serial.println(address,HEX);
  44.     }    
  45.   }
  46.   if (nDevices == 0) Serial.println("No I2C devices found\n");
  47.   else Serial.println("done\n");
  48. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp:1:18: fatal error: Wire.h: No such file or directory
 #include <Wire.h>
                  ^
compilation terminated.
stdout
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Standard output is empty
https://ideone.com/7Nbmho
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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