引言
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。
操作步骤
- 将该代码复制到Arduino IDE中。
#include <Wire.h> void setup(){ Wire.begin(); Serial.begin(9600); Serial.println(" I2C 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 "); else Serial.println("done "); 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。