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用Arduino做温湿度显示器是代码出现问题

[mw_shl_code=xml,true]// 128x64 I2C OLED
#include "DHT.h"
// DHT22数字传感器库
#include "U8glib.h"
// OLED库

U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE); // I2C

#define DHTPIN 2
#define DHTTYPE DHT22 // DHT 22  (AM2302)
DHT dht(DHTPIN, DHTTYPE);

void draw(void) {

  u8g.setFont(u8g_font_8x13); //使用8x13大小的字符
  u8g.setPrintPos(0, 20); // 对应 x，y 轴值
  u8g.print("HUMI(%) :");
  u8g.setPrintPos(73, 20);
  u8g.print((float)DHT22.humidity);
  u8g.setPrintPos(0, 40);
  u8g.print("TEMP(oC):");
  u8g.setPrintPos(73, 40);
  u8g.print((float)DHT22.temperature);
}

void setup()
{
  Serial.begin(9600);//串口波特率
  Serial.println("DHT22 TEST PROGRAM ");
  Serial.print("LIBRARY VERSION: ");
  Serial.println(DHT22LIB_VERSION);
  Serial.println();
}

void loop()
{
  Serial.println("\n");

  int chk = DHT22.read(DHT22PIN);

  Serial.print("Read sensor: ");
  switch (chk)
  {
case DHTLIB_OK:
            Serial.println("OK");
            break;
case DHTLIB_ERROR_CHECKSUM:
            Serial.println("Checksum error");
            break;
case DHTLIB_ERROR_TIMEOUT:
            Serial.println("Time out error");
            break;
default:
            Serial.println("Unknown error");
            break;
  }

  Serial.print("Humidity (%): ");
  Serial.println((float)DHT22.humidity,2);

  Serial.print("Temperature (oC): ");
  Serial.println((float)DHT22.temperature,2);

  u8g.firstPage();
  do {
draw();
  } while( u8g.nextPage() );

  delay(10000);
}[/mw_shl_code]

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FishGan 高级技师

发表于 2018-10-4 13:59:32

本帖最后由 FishGan 于 2018-10-4 14:00 编辑

把59行的代码[mw_shl_code=cpp,true]Serial.println((float)DHT22.humidity,2);[/mw_shl_code]改成
[mw_shl_code=cpp,true]Serial.println((float)dht.humidity,2);[/mw_shl_code]
就行了。62行也对应改一下

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