first steps with LittleFS

Arduino/CanGrow/CanGrow.ino

@@ -58,7 +58,7 @@
 #include <ArduinoJson.h>
 // https://github.com/PaulStoffregen/Time
 #include <TimeLib.h>
-
+// arduino-core for esp8266 and esp32
 #include "LittleFS.h"
 
 
@@ -75,6 +75,40 @@ void setup() {
   Serial.print(CanGrowBuild);
   Serial.println(" starting ::.");
 
+  Serial.println(":: initialise LittleFS ::");  
+  if(LittleFS.begin()) {
+    Serial.println(":: LittleFS successfully initialized ::");
+  } else {
+    Serial.println("!! LittleFS failed initializing !!");
+    delay(10000);
+    LittleFS.format();
+    Serial.println("!! formatting LittleFS !!");
+  }
+  
+  // read the configfile from LittleFS
+  File lfs_configfile = LittleFS.open(configfile, "r");
+  if(!lfs_configfile) {
+    Serial.println("!! LittleFS: config.json not found, creating it !!");
+    lfs_configfile = LittleFS.open(configfile, "w");
+    if(lfs_configfile) {
+      Serial.println(":: LittleFS: config.json successfully created ::");
+      // write into the file
+      lfs_configfile.print("{}");
+      // close the file
+      lfs_configfile.close();
+    }
+  } else {
+    Serial.println(":: LittleFS: config.json successfully opened ::");
+    String configfile_content = "";
+    Serial.println(lfs_configfile.available());
+    while (lfs_configfile.available()) {
+      configfile_content += (char)lfs_configfile.read();
+    }
+    
+    Serial.println("-- LittleFS: config.json content --");
+    Serial.println(configfile_content);
+    Serial.println("-- LittleFS: config.json end --");
+  }
   
 }
 

Arduino/CanGrow/include/CanGrow.h

@@ -28,3 +28,6 @@
  */
 
 #include "CanGrow_Version.h"
+
+
+const char* configfile = "config.json";