划句顾 发表于 2021-9-8 21:28:25

ESP8266:Stream

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() {}

static/image/hrline/5.gif

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