add new

.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

include/README

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+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

lib/README

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+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

platformio.ini

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+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:nodemcu-32s]
+platform = espressif32
+board = nodemcu-32s
+board_build.mcu = esp32
+framework = arduino
+monitor_speed = 115200

src/main.cpp

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+#include <HardwareSerial.h>
+
+const int bufferSize = 1024; // Kích thước bộ đệm tùy chỉnh
+uint8_t buffer[bufferSize];
+int bufferIndex = 0;
+int numRows = 0;
+int numCols = 0;
+const int floatSize = sizeof(float);
+void setup() {
+  Serial.begin(115200);  // Đảm bảo baud rate khớp với baud rate của Python
+}
+
+void loop() {
+  while (Serial.available() > 0) {
+    uint8_t byteReceived = Serial.read();
+    
+    if (bufferIndex < bufferSize) {
+      buffer[bufferIndex++] = byteReceived;
+    } else {
+      // Xử lý tình huống quá tải
+      Serial.println("Buffer overflow");
+      bufferIndex = 0; // Reset buffer index in case of overflow
+    }
+  }
+
+  // if (bufferIndex > 0) {
+  //   // Đã nhận dữ liệu
+  //   Serial.println("Data received:");
+  //   for (int i = 0; i < bufferIndex; ++i) {
+  //     Serial.print(buffer[i]);
+  //     Serial.print(" ");
+  //   }
+  //   Serial.println();
+    
+  //   // Reset chỉ số chỉ mục sau khi xử lý
+  //   bufferIndex = 0;
+  // }
+  //  if (bufferIndex > 0) {
+  //   Đã nhận dữ liệu
+  //   Serial.println("Data received:");
+  //   int numFloats = bufferIndex / sizeof(float);
+  //   for (int i = 0; i < numFloats; ++i) {
+  //     float value;
+  //     memcpy(&value, &buffer[i * sizeof(float)], sizeof(float));
+  //     Serial.print(value, 4);  // In với 4 chữ số thập phân
+  //     Serial.print(" ");
+  //   }
+  //   Serial.println();
+    
+  //   Reset chỉ số chỉ mục sau khi xử lý
+  //   bufferIndex = 0;
+  // }
+  if (bufferIndex >= 2 * sizeof(int)) {
+    // Đã nhận đủ kích thước dữ liệu
+    memcpy(&numRows, buffer, sizeof(int));
+    memcpy(&numCols, buffer + sizeof(int), sizeof(int));
+
+    int expectedSize = numRows * numCols * floatSize;
+
+    if (bufferIndex >= (2 * sizeof(int) + expectedSize)) {
+      Serial.println("Data received:");
+      float data[numRows][numCols];
+      for (int row = 0; row < numRows; ++row) {
+        for (int col = 0; col < numCols; ++col) {
+          int index = (2 * sizeof(int)) + (row * numCols + col) * floatSize;
+          float value;
+          memcpy(&value, &buffer[index], floatSize);
+          data[row][col] = value;
+          Serial.print(value, 4);  // In với 4 chữ số thập phân
+          Serial.print(" ");
+        }
+        Serial.println();
+      }
+      
+      // Reset chỉ số chỉ mục sau khi xử lý
+      bufferIndex = 0;
+    }
+  }
+}

test/README

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+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html