帮我用arduino写一段esp32的查找IIC总线上面设备并打印出地址的程序
时间: 2023-11-21 17:04:43 浏览: 74
好的,以下是一个简单的ESP32查找IIC总线上设备地址并打印出来的示例代码:
```
#include <Wire.h>
void setup() {
Serial.begin(9600);
Wire.begin();
}
void loop() {
byte error, address;
int nDevices;
Serial.println("Scanning...");
nDevices = 0;
for(address = 1; address < 127; 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
}
```
这个程序会扫描从1到127地址的设备,并打印出在这个地址上找到的设备的地址。如果没有找到设备,程序会打印出"No I2C devices found"。注意,你需要将ESP32连接到IIC总线上才能运行此程序。
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