basics of factory reset implemented

Arduino/CanGrow/CanGrow.ino

@@ -63,6 +63,9 @@
 
 
 void setup() {
+  // define output for onboard LED/WIPE pin
+  pinMode(PinWIPE, OUTPUT);
+  
   // Start Serial
   Serial.begin(115200);
 
@@ -75,14 +78,37 @@ void setup() {
   Serial.print(CanGrowBuild);
   Serial.println(" starting ::.");
 
+  
+  Serial.print(":: To format LittleFS, pull ");
+  Serial.print(PinWIPE); 
+  Serial.println("(PinWIPE) to LOW - NOW! (2 seconds left) ::");
+  
+  // blink with the onboard LED on D4 (PinWIPE)
+  for(byte i = 0; i <= 6 ; i++) {
+    if(i % 2) {
+      digitalWrite(PinWIPE, LOW);
+    } else {
+      digitalWrite(PinWIPE, HIGH);
+    }
+    delay(333);
+  }
+  // set back to HIGH because thats the default
+  digitalWrite(PinWIPE, HIGH);
+  //delay(2000);
+
+  // read status from PinWIPE to WIPE
+  // when PinWIPE is set to LOW, format LittleFS
+  if(digitalRead(PinWIPE) == LOW) {
+    Serial.println("!! formatting LittleFS !!");
+    LittleFS.format();
+  }
+
+
   Serial.println(":: initialise LittleFS ::");  
   if(LittleFS.begin()) {
-    Serial.println(":: LittleFS successfully initialized ::");
+    Serial.println(":: LittleFS successfully initialised ::");
   } else {
-    Serial.println("!! LittleFS failed initializing !!");
-    delay(10000);
-    LittleFS.format();
-    Serial.println("!! formatting LittleFS !!");
+    Serial.println("!! LittleFS failed initialising !!");
   }
   
   // read the configfile from LittleFS
@@ -93,14 +119,14 @@ void setup() {
     if(lfs_configfile) {
       Serial.println(":: LittleFS: config.json successfully created ::");
       // write into the file
-      lfs_configfile.print("{}");
+      lfs_configfile.print("{test: 2}");
       // 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();
     }

Arduino/CanGrow/include/CanGrow.h

@@ -31,3 +31,11 @@
 
 
 const char* configfile = "config.json";
+
+#ifdef ESP8266
+const uint8_t PinWIPE = D4;
+#endif
+
+#ifdef ESP32
+const uint8_t PinWIPE = 2;
+#endif