nanopc t4上读取温湿度传感器数据代码(qt)
时间: 2023-12-11 15:05:39 浏览: 32
以下是使用Qt编写的读取DHT11温湿度传感器数据的示例代码:
```cpp
#include <wiringPi.h>
#include <QDebug>
#define DHT_PIN 7
int main(int argc, char *argv[])
{
if (wiringPiSetup() == -1) {
qDebug() << "wiringPi setup failed!";
return 1;
}
int data[5] = { 0, 0, 0, 0, 0 };
int j = 0;
pinMode(DHT_PIN, OUTPUT);
digitalWrite(DHT_PIN, LOW);
delay(18);
digitalWrite(DHT_PIN, HIGH);
delayMicroseconds(30);
pinMode(DHT_PIN, INPUT);
for (int i = 0; i < 85; i++) {
int bit = digitalRead(DHT_PIN);
if (bit == 1) {
int idx = j / 8;
data[idx] <<= 1;
data[idx] |= 1;
} else if (bit == 0) {
int idx = j / 8;
data[idx] <<= 1;
}
j++;
}
if (j >= 40 && data[4] == ((data[0] + data[1] + data[2] + data[3]) & 0xFF)) {
float temperature = (float)data[2];
float humidity = (float)data[0];
qDebug() << "Temperature: " << temperature << "C";
qDebug() << "Humidity: " << humidity << "%";
} else {
qDebug() << "Failed to get reading from DHT11.";
}
return 0;
}
```
该代码使用wiringPi库来控制GPIO引脚,并通过DHT11的数据传输规则读取温湿度数据。请注意,该代码只适用于DHT11传感器,如果您使用的是其他型号的传感器,则需要相应地修改代码。