git init

.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"
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "idf.pythonInstallPath": "/usr/bin/python"
+}

compile_commands.json

@@ -0,0 +1 @@
+[]

include/README

@@ -0,0 +1,37 @@
+
+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 convention is to give header files names that end with `.h'.
+
+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

@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for 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
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

platformio.ini

@@ -0,0 +1,19 @@
+; 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:esp32dev]
+platform = espressif32
+board = esp32dev
+framework = arduino
+monitor_speed = 115200
+lib_deps =
+    adafruit/Adafruit ST7735 and ST7789 Library @ ^1.7.1
+    adafruit/Adafruit GFX Library @ ^1.10.10
+    bblanchon/ArduinoJson@^7.0.4

src/main.cpp

@@ -0,0 +1,97 @@
+#include <SPI.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_ST7735.h>
+#include <WiFi.h>
+#include <HTTPClient.h>
+#include <Arduino.h>
+#include <ArduinoJson.h>
+
+
+#define TFT_CS   12  // D12, GPIO12
+#define TFT_RST  25  // D25, GPIO25
+#define TFT_DC   2   // D2,  GPIO2
+
+Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_RST);
+
+const char* ssid = "Keenetic-4604";
+const char* password = "23137099";
+
+unsigned long previousMillis = 0;
+const long interval = 500;
+int dotCount = 0;
+
+int cursorY = 10; 
+
+void setup() {
+    Serial.begin(115200);
+    delay(1000);
+
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(ssid, password);
+
+    tft.initR(INITR_BLACKTAB);
+    tft.setRotation(1);
+    tft.fillScreen(ST77XX_BLACK);
+    tft.setTextColor(ST77XX_WHITE);
+    tft.setTextSize(2);
+    tft.setCursor(10, cursorY);
+
+    while(WiFi.status() != WL_CONNECTED){
+        unsigned long currentMillis = millis();
+        
+        if (currentMillis - previousMillis >= interval) {
+            previousMillis = currentMillis;
+
+            tft.fillScreen(ST77XX_BLACK);
+            tft.setCursor(10, 10);
+
+            tft.print("Connecting");
+            for (int i = 0; i < dotCount; i++) {
+                tft.print(".");
+            }
+
+            dotCount++;
+            if (dotCount > 3) {
+                dotCount = 0;
+            }
+        }
+    }
+
+    tft.fillScreen(ST77XX_BLACK);
+    tft.setCursor(10, 10);
+    tft.println("Connected:");
+    tft.println(WiFi.localIP());
+
+    HTTPClient http;
+
+    String serverName = "https://kekkai-api.redume.su/api/getRate/";
+
+    String serverPath = serverName + "?from_currency=USD&conv_currency=RUB&date=2025-05-26";
+
+    http.begin(serverPath.c_str());
+
+    int httpResCode = http.GET();
+
+    if (httpResCode > 0) {
+        tft.fillScreen(ST77XX_BLACK);
+        tft.setCursor(10, 10);
+        tft.setTextSize(1);
+
+        String payload = http.getString();
+
+        StaticJsonDocument<256> doc;
+
+        DeserializationError error = deserializeJson(doc, payload);
+        if (error) {
+            tft.println("JSON error");
+            return;
+        }
+
+        String from = doc["from_currency"].as<const char*>();
+        String to = doc["conv_currency"].as<const char*>();
+        float rate = doc["rate"].as<float>();
+        tft.print("1 " + String(from) + " = " + String(rate) + " " + String(to));
+    }
+}
+
+void loop() {}

test/README

@@ -0,0 +1,11 @@
+
+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