Merci pour ces informations.
Bonjour
A toutes fins utiles, si vous avez un doute sur l'adresse du composant, vous pouvez utiliser un "sniffer" qui joint successivement plusieurs adresses et renvoie celle(s) qui répond(ent).
Un exemple :
#include <Wire.h>
void setup()
{
delay(5000);
Wire.begin();
Serial.begin(9600);
Serial.println("\nI2C Scanner");
}
void loop()
{
byte error, address;
int nDevices;
Serial.println("Scanning...");
nDevices = 0;
for(address = 1; address < 254; address++ ){
Serial.print("Scaning address 0x");
Serial.print("0");
Serial.println(address,HEX);
// 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("Unknow 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");
Serial.println("--------------------------");
delay(10000); // wait 5 seconds for next scan
}