/* Example based on the LittleFS_Timestamp.ino example available at github  * MODIFIED TO USE MANUAL TIMESTAMP WITH setTimeCallback(myTimeCb)  * This sketch basically creates, appends and deletes a file named zhello.txt  * It shows that file creation date is correct but lastwrite and fileTime are not  * when using setTimeCallback().  * Key changes in the original sketch are marked around ************* comment lines  *   * Note: I tested this on a working project with LittleFS working.   * If you want to first format, uncomment the LittleFS.format(); line  */ /* ORIGINAL SKETCH LittleFS_Timestamp.ino /* Example showing timestamp support in LittleFS */ /* Released into the public domain. */ /* Earle F. Philhower, III <earlephilhower@yahoo.com> */ #include <FS.h> #include <LittleFS.h> // #include <time.h> #include <ESP8266WiFi.h> #ifndef STASSID #define STASSID "..." #define STAPSK "..." #endif const char *ssid = STASSID; const char *pass = STAPSK; // ************************** time_t myTimeCb() { Serial.println("--- myTimeCb was called"); return 1608231600; // 17 dec 2020 @ 19:00:00 GMT } // *************************** void listDir(const char * dirname) { Serial.printf("Listing directory: %s\n", dirname); Dir root = LittleFS.openDir(dirname); while (root.next()) { File file = root.openFile("r"); Serial.print("FILE: "); Serial.print(root.fileName()); Serial.print(" SIZE: "); Serial.println(file.size()); time_t cr = file.getCreationTime(); time_t lw = file.getLastWrite(); file.close(); time_t ft = root.fileTime(); struct tm * tmstruct = localtime(&cr); Serial.printf(" CREATION : %d-%02d-%02d %02d:%02d:%02d\n", (tmstruct->tm_year) + 1900, (tmstruct->tm_mon) + 1, tmstruct->tm_mday, tmstruct->tm_hour, tmstruct->tm_min, tmstruct->tm_sec); tmstruct = localtime(&lw); Serial.printf(" LAST WRITE: %d-%02d-%02d %02d:%02d:%02d\n", (tmstruct->tm_year) + 1900, (tmstruct->tm_mon) + 1, tmstruct->tm_mday, tmstruct->tm_hour, tmstruct->tm_min, tmstruct->tm_sec); tmstruct = localtime(&ft); Serial.printf(" fileTime : %d-%02d-%02d %02d:%02d:%02d\n", (tmstruct->tm_year) + 1900, (tmstruct->tm_mon) + 1, tmstruct->tm_mday, tmstruct->tm_hour, tmstruct->tm_min, tmstruct->tm_sec); } } void writeFile(const char * path, const char * message) { Serial.printf("Writing file: %s\n", path); File file = LittleFS.open(path, "w"); if (!file) { Serial.println("Failed to open file for writing"); return; } if (file.print(message)) { Serial.println("File written"); } else { Serial.println("Write failed"); } delay(2000); // Make sure the CREATE and LASTWRITE times are different file.close(); } void appendFile(const char * path, const char * message) { Serial.printf("Appending to file: %s\n", path); File file = LittleFS.open(path, "a"); if (!file) { Serial.println("Failed to open file for appending"); return; } if (file.print(message)) { Serial.println("Message appended"); } else { Serial.println("Append failed"); } file.close(); } void deleteFile(const char * path) { Serial.printf("Deleting file: %s\n", path); if (LittleFS.remove(path)) { Serial.println("File deleted"); } else { Serial.println("Delete failed"); } } void setup() { Serial.begin(115200); // We start by connecting to a WiFi network Serial.println(); Serial.println(); Serial.print("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, pass); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println("WiFi connected"); Serial.println("IP address: "); Serial.println(WiFi.localIP()); /**************************  /* no LittleFS formating for me ! */ /*  Serial.println("Formatting LittleFS filesystem");  LittleFS.format();  */ Serial.println("Mount LittleFS"); if (!LittleFS.begin()) { Serial.println("LittleFS mount failed"); return; } // *********************************** LittleFS.setTimeCallback(myTimeCb); // *********************************** listDir("/"); deleteFile("/zhello.txt"); writeFile("/zhello.txt", "Hello "); // to differentiate creation and lastwrite timestamps Serial.println("\n...Waiting 2 secs...\n"); delay(2000); appendFile("/zhello.txt", "World!\n"); Serial.println(""); listDir("/"); Serial.println("\nThe timestamp above show "); Serial.println("zhello.txt creation date is as provided by myTimeCb" ); Serial.println("but lastWrite and fileTime are 01.01.1970. Probably using time(nullptr)." ); } void loop() { }