DHTll Read Datalstemperature.chumidity) :
时间: 2024-03-30 21:36:50 浏览: 13
这是一个函数调用,它的作用是从 DHT11 温湿度传感器中读取数据,并将温度和湿度值保存到指定的变量中。具体来说,它会调用 DHT11 库中的 ReadData 函数,并将温度和湿度值的变量作为参数传入,即 temperature 和 humidity。该函数的返回值可能是一个状态码,用于指示函数执行的成功或失败情况。
相关问题
A USER CODE BEGIN 2printf("Get time fail,status is d\r\n",status):while(DHTll Init()) printf("DHTll Checked failed!!! r nr) :HAL Delay(500): printf("DHTll Checked Sucess!!!\r\n") ; /A USER CODE END 2 */ /x Infinite loop */YA USER CODE BEGIN WHILE */ while (1) status=HAL RTC GetTime (chrtc, sTime,RTC FORMAT BIN):if(status != HAL OK)( printf("get time fail,status is ed\r n",status): status=HAL RTC GetDate(chrtc, sDate,RTC FORMAT BIN):if(status ! HAL OK) (printf("get date fail,status is ed\r n",status): orintf"sd-d-td d rin dsdid-dr n",2000-Dare ear anae Month,sare are nare eekay,slime Moursstime Minutes.mime secondDHTll Read Datalstemperature.chumidity) : printf(uDHTll Temperature =d,d degree r n",temperature>>8,temperaturesOxff):printf("DHTll Humidity = d,%ds% r n"humidity>>8,humidity&Oxff);
I'm sorry, but I'm having trouble understanding your question. The code you provided appears to be incomplete and contains syntax errors. Can you please provide more context or clarify your question?
private void parse(String s) { try { JSONObject data=new JSONObject(s); String reason=data.optString("reason"); JSONArray results=data.optJSONArray("results"); JSONObject resultbean =results.getJSONObject(0); String city=resultbean.optString("city"); JSONObject ctime=results.getJSONObject(1); String ctrue=ctime.optString("temperature"); String chumidity=ctime.optString("humidity"); String cinfo=ctime.optString("info"); String cwid=ctime.optString("wid"); String cdirect=ctime.optString("direct"); String cpower=ctime.optString("power"); String caqi=ctime.optString("aqi"); tv.setText(reason+"\n"+city+"\n"+caqi+"\n"); } catch (JSONException e) { e.printStackTrace(); } }
从您提供的代码来看,代码的JSON解析部分似乎没有问题。但是,我注意到您使用了optString()方法来获取JSON对象的属性值,而不是getString()方法。这两种方法的区别在于,如果JSON对象中不存在该属性,getString()方法会抛出JSONException异常,而optString()方法会返回一个空字符串。因此,如果JSON对象中不存在该属性,使用optString()方法可能会导致空指针异常。
建议您将代码中的optString()方法改为getString()方法,以确保正确处理JSON对象中的属性。例如,您可以将以下代码:
```
String city=resultbean.optString("city");
```
改为:
```
String city=resultbean.getString("city");
```
同样,您也可以将其他使用optString()方法获取属性值的代码改为getString()方法来避免空指针异常。
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