ESP8266:Stream

划句顾

代码如下：

/**
 * author :LaoGu
 * time   :2021/9/8
 * purpose: 通过File文件演示Stream操作
***/
#include<FS.h>

String file_name = "/LaoGu/notes.txt"; //被读取的文件位置和名称

void setup() {
  Serial.begin(9600);
  Serial.println(""); 
  
  //启动SPIFFS
  if(SPIFFS.begin()){
    Serial.println("SPIFFS started!");
    }else{
      Serial.println("SPIFFS failed to start!");
      }
   
   File dataFile = SPIFFS.open(file_name,"w");
   dataFile.println("Hello IOT World.");
   dataFile.close();
   Serial.println("Finished Writing data to SPIFFS"); 

   Serial.print("Try to find IOT in ");
   Serial.println(file_name);

   dataFile = SPIFFS.open(file_name,"r");
   if(dataFile.find("IOT")){
    Serial.print("Found IOT in file: ");
    Serial.println(file_name);
    }

    Serial.println("User readString to get contents of dataFile after find");
    Serial.println(dataFile.readString());

      dataFile.close();
}
void loop() {}

                               
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