Add ESP700 command

Send file line by line from SPIFFS: [ESP700]<file name>
for macro purpose

README.md

@@ -102,12 +102,13 @@ Additionally 404.tpl (the page not found) and restart.tpl(restart page when appl
 
 ##Direct commands:    
 ```
-    -restart module from host/printer: [ESP888]RESTART      
+    -Restart module from host/printer: [ESP888]RESTART      
+    -Send file line by line from SPIFFS: [ESP700]<file name>
     -Get IP (only printer see answer): [ESP111]M117     
-    -reset EEPROM and restart: [ESP444]RESET   
-    -reset user password: [ESP555]<admin password>    
-    -display EEPROM content: [ESP444]CONFIG    
-    -go to safe mode without restart: [ESP444]SAFEMODE    
+    -Reset EEPROM and restart: [ESP444]RESET   
+    -Deset user password: [ESP555]<admin password>    
+    -Display EEPROM content: [ESP444]CONFIG    
+    -Go to safe mode without restart: [ESP444]SAFEMODE    
     -SSID: [ESP100]<SSID>    
     -Password: [ESP101]<Password>   
     -Station mode: [ESP103]STA   

esp3d/command.cpp

@@ -22,6 +22,7 @@
 #include "config.h"
 #include "wifi.h"
 #include "webinterface.h"
+#include <FS.h>
 
 String COMMAND::buffer_serial;
 String COMMAND::buffer_tcp;
@@ -119,6 +120,32 @@ void COMMAND::execute_command(int cmd,String cmd_params)
         break;
         }
 #endif
+    case 700: //read local file
+        {//be sure serial is locked
+        if ((web_interface->blockserial)) break;
+        cmd_params.trim() ;
+        if ((cmd_params.length() > 0) && (cmd_params[0] != '/')) cmd_params = "/" + cmd_params;
+        File currentfile = SPIFFS.open(cmd_params, "r");
+        if (currentfile) {//if file open success
+            //flush to be sure send buffer is empty
+            Serial.flush();
+            //read content
+            String currentline = currentfile.readString();
+            //until no line in file
+            while (currentline.length() >0)
+                {   //send line to serial
+                    Serial.println(currentline);
+                    //flush to be sure send buffer is empty
+                    delay(0);
+                    Serial.flush();
+                    currentline="";
+                    //read next line if any
+                    currentline = currentfile.readString();
+                }
+            currentfile.close()
+;            }
+        break;
+        }
     case 888:
         if (cmd_params=="RESTART") {
             Serial.print("\r");

esp3d/config.h

@@ -68,7 +68,7 @@
 #include <Arduino.h>
 #include "wifi.h"
 //version and sources location
-#define FW_VERSION "0.7.71"
+#define FW_VERSION "0.7.72"
 #define REPOSITORY "https://github.com/luc-github/ESP8266"