Cours:I2cscanner : Différence entre versions
(Page créée avec « https://playground.arduino.cc/Main/I2cScanner/ <source lang=cpp> #include <Wire.h> void setup() { Wire.begin(); Serial.begin(9600); while (!Serial); /... ») |
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https://playground.arduino.cc/Main/I2cScanner/ | https://playground.arduino.cc/Main/I2cScanner/ | ||
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+ | [[Fichier:I2CScanner.zip]] | ||
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<source lang=cpp> | <source lang=cpp> |
Version actuelle datée du 4 mai 2022 à 14:13
https://playground.arduino.cc/Main/I2cScanner/
#include <Wire.h>
void setup()
{
Wire.begin();
Serial.begin(9600);
while (!Serial); // Leonardo: wait for serial monitor
Serial.println("\nI2C Scanner");
}
void loop()
{
byte error, address;
int nDevices;
Serial.println("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("I2C device found at address 0x");
if (address<16)
Serial.print("0");
Serial.print(address,HEX);
Serial.println(" !");
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");
delay(5000); // wait 5 seconds for next scan
}