ESP8266 Community Forum

- Fri Feb 26, 2016 10:25 am #41946 I'm using SPIFFS to create 3 files for reading and writing data.

/data/config.json
/logs/errors.json
/logs/actions.json

Code: Select all#include <ArduinoJson.h>
#include "FS.h"

#define CONFIG_FILE       "/data/config.json"
#define ERROR_LOG_FILE       "/logs/errors.json"
#define ACTION_LOG_FILE      "/logs/actions.json"

bool loadConfig(const char* filename) {
     File file = SPIFFS.open(filename, "r");
     if (!file) {
       Serial.println("Failed to open config file");
       return false;
     }

     size_t size = file.size();
     if (size > 1024) {
       Serial.println("Config file size is too large");
       return false;
     }
     else if (size == 0)   {
      Serial.println("File is empty");
      return false;
     }
     std::unique_ptr<char[]> buf(new char[size]);
     file.readBytes(buf.get(), size);

     StaticJsonBuffer<200> jsonBuffer;
     JsonObject& json = jsonBuffer.parseObject(buf.get());

     if (!json.success()) {
       Serial.println("Failed to parse config file");
       return false;
     }

     const char* url = json["url"];
     const char* Token = json["Token"];

     Serial.print("Loaded url: ");
     Serial.println(url);
     Serial.print("Loaded Token: ");
     Serial.println(Token);

     file.close();
}

void setup() {
  Serial.begin(115200);
  Serial.println("");
  delay(1000);
  Serial.println("Mounting FS...");

  if (!SPIFFS.begin()) {
    Serial.println("Failed to mount file system");
    return;
  }

   StaticJsonBuffer<200> jsonBuffer;
   JsonObject& json = jsonBuffer.createObject();

   Dir dir = SPIFFS.openDir("/");
   while (dir.next()) {
      Serial.print(dir.fileName());
      File f = dir.openFile("r");
      Serial.println(f.size());
   }

   if (SPIFFS.exists(CONFIG_FILE)) {

      Serial.print(CONFIG_FILE); Serial.println(" exists!");
      if (!loadConfig(CONFIG_FILE))   {
         File configFile = SPIFFS.open(CONFIG_FILE, "w");
         json["url"] = "api.something.awesome";
         json["Token"] = "bd1ba53b5915krpnd14fd992b1d7349f49d8e5";
         json.printTo(configFile);

         configFile.close();
      }
   }
   else   {
      Serial.print("Creating "); Serial.println(CONFIG_FILE);
      File configFile = SPIFFS.open(CONFIG_FILE, "w");
      json["url"] = "api.something.awesome";
      json["Token"] = "bd1ba53b5915krpnd14fd992b1d7349f49d8e5";
      json.printTo(configFile);

      configFile.close();
   }

   if (SPIFFS.exists(ACTION_LOG_FILE)) {

      Serial.print(ACTION_LOG_FILE); Serial.println(" exists!");
      if (!loadConfig(ACTION_LOG_FILE))   {
         File actionFile = SPIFFS.open(ACTION_LOG_FILE, "w");
         json["url"] = "api.something.awesome";
         json["Token"] = "action";
         json.printTo(actionFile);

         actionFile.close();
      }
   }
   else   {
      Serial.print("Creating "); Serial.println(ACTION_LOG_FILE);
      File actionFile = SPIFFS.open(ACTION_LOG_FILE, "w");
      actionFile.close();
   }

   if (SPIFFS.exists(ERROR_LOG_FILE)) {

      Serial.print(ERROR_LOG_FILE); Serial.println(" exists!");
      if (!loadConfig(ERROR_LOG_FILE))   {
         File errorFile = SPIFFS.open(ERROR_LOG_FILE, "w");
         json["url"] = "api.something.awesome";
         json["Token"] = "error";
         json.printTo(errorFile);

         errorFile.close();
      }
   }
   else   {
      Serial.print("Creating "); Serial.println(ERROR_LOG_FILE);
      File errorFile = SPIFFS.open(ERROR_LOG_FILE, "w");
      errorFile.close();
   }
}

void loop() {

   Dir dir = SPIFFS.openDir("/");
   while (dir.next()) {
       Serial.print(dir.fileName());
       File f = dir.openFile("r");
       Serial.println(f.size());
   }
   delay(1500);
   Serial.println();

}


On the first run, everything seems to be peachy:

Code: Select allMounting FS...
Creating /data/config.json
Creating /logs/actions.json
Creating /logs/errors.json
/data/config.json80
/logs/actions.json0
/logs/errors.json0

/data/config.json80
/logs/actions.json0
/logs/errors.json0

/data/config.json80
/logs/actions.json0
/logs/errors.json0


On the second run (after all the files are created), it finds all the files, finds that the action and error files are empty attempts to write to them but it's just renaming them to config.json instead. Now I have 3 config.json files.

Code: Select allMounting FS...
/data/config.json80
/logs/actions.json0
/logs/errors.json0
/data/config.json exists!
Loaded url: api.something.awesome
Loaded Token: bd1ba53b5915krpnd14fd992b1d7349f49d8e5
/logs/actions.json exists!
File is empty
/logs/errors.json exists!
File is empty
/data/config.json80
/data/config.json48
/data/config.json47

/data/config.json80
/data/config.json48
/data/config.json47

/data/config.json80
/data/config.json48
/data/config.json47


What am I missing? Why is it allowing me to have 3 identical file names?