initial upload implementation draft

src/espmega_iot_core.cpp

@@ -546,13 +546,21 @@ void ota_begin()
     otaserver.sendHeader("Connection","close");
   },[](){
     HTTPUpload &upload = otaserver.upload();
+    size_t file_size = 0;
     if(upload.status == UPLOAD_FILE_START) {
-      Serial.println(upload.totalSize);
+      for(int i=0;i<otaserver.headers();i++) {
+        if(!otaserver.headerName(i).compareTo("Content-Length")) {
+          Serial.printf("Content-Length: %s\n",otaserver.header(i).c_str());
+          file_size = otaserver.header(i).toInt();
+        }
+      }
+      
+      Serial.println(file_size);
+      lcd_upload_start(file_size);
     } else if (upload.status == UPLOAD_FILE_WRITE) {
-      for(int i = 0; i<upload.currentSize;i++)
-        Serial.print(upload.buf[i],HEX);
+      lcd_upload_write(upload.buf, upload.currentSize);
     } else if (upload.status == UPLOAD_FILE_END) {
-        Serial.println("Upload End");
+      Serial.println("Upload END.");
     }
   });
   otaserver.begin();

src/espmega_iot_lcd.cpp

@@ -1,6 +1,8 @@
 #include <user_code.hpp>
 #include <espmega_iot_lcd.hpp>
 
+int lcd_byte_counter = 0;
+
 /**
  * @brief Sends stop bit to LCD.
  *
@@ -70,9 +72,11 @@ bool lcd_upload_start(size_t size)
     Serial.print("connect");
     lcd_send_stop_bit();
     delay(1000);
-    Serial.print("whmi-wri 1024,115200,res0");
+    Serial.print("whmi-wri ");
+    Serial.print(size);
+    Serial.print(",115200,res0");
     lcd_send_stop_bit();
-    lcd_wait_ack();
+    return lcd_wait_ack();
 }
 
 /**
@@ -87,9 +91,15 @@ bool lcd_upload_write(uint8_t *data, size_t size)
     for (int i = 0; i < size; i++)
     {
         Serial.write(data[i]);
+        lcd_byte_counter++;
+        if (lcd_byte_counter == 4096)
+        {
+            lcd_wait_ack();
+            lcd_byte_counter = 0;
         }
+    }
+    return true;
 }
-
 /**
  * Waits for an acknowledgement signal from the LCD.
  * @return true if acknowledgement signal is received, false otherwise.
@@ -97,13 +107,16 @@ bool lcd_upload_write(uint8_t *data, size_t size)
 bool lcd_wait_ack()
 {
     bool data_ok = false;
-    for (int i; i < 50; i++)
+    for (int i = 0; i < 50; i++)
+    {
+        if (Serial.available())
         {
             if (Serial.read() == 0x05)
             {
                 data_ok = true;
                 break;
             }
+        }
         delay(100);
     }
     return data_ok;

src/ota_html/ota-part3.html

@@ -28,6 +28,9 @@ R"=====(<button type="button" class="conf" onclick="window.location.href='config
       data: data,
       contentType: false,
       processData: false,
+      headers: {
+        "Content-Length": data.length
+      },
       xhr: function () {
         var xhr = new window.XMLHttpRequest();
         xhr.upload.addEventListener(