I2C scanner是一种用于查找I2C设备地址的Arduino程序。这个程序会扫描所有可能的I2C地址,并在Serial Monitor中打印出找到的设备的地址。
#include <Wire.h>
void setup(){
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 < 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("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");
delay(5000); // wait 5 seconds for next scan
}
连接Arduino板到你的电脑。
选择正确的板和端口,然后上传程序。
打开Serial Monitor(在工具菜单下或按快捷键Ctrl+Shift+M)。
在Serial Monitor中,你应该可以看到程序打印出的消息,包括找到的I2C设备的地址。