Initial commit

.gitignore

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+.pio

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="PlatformIOSettings">
+    <option name="linkedExternalProjectsSettings">
+      <PlatformioProjectSettings>
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+          </set>
+        </option>
+      </PlatformioProjectSettings>
+    </option>
+  </component>
+  <component name="PlatformIOWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
+</project>

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:airm2m_core_esp32c3]
+platform = espressif32
+board = airm2m_core_esp32c3
+framework = arduino
+lib_deps =
+# RECOMMENDED
+# Accept new functionality in a backwards compatible manner and patches
+    siara-cc/Sqlite3Esp32 @ ^2.4
+
+# Accept only backwards compatible bug fixes
+# (any version with the same major and minor versions, and an equal or greater patch version)
+    siara-cc/Sqlite3Esp32 @ ~2.4
+
+# The exact version
+    siara-cc/Sqlite3Esp32 @ 2.4

src/main.cpp

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+/*
+    This example opens Sqlite3 databases from SD Card and
+    retrieves data from them.
+    Before running please copy following files to SD Card:
+    examples/sqlite3_sdmmc/data/mdr512.db
+    examples/sqlite3_sdmmc/data/census2000names.db
+    Connections:
+     * SD Card | ESP32
+     *  DAT2       -
+     *  DAT3       SS (D5)
+     *  CMD        MOSI (D23)
+     *  VSS        GND
+     *  VDD        3.3V
+     *  CLK        SCK (D18)
+     *  DAT0       MISO (D19)
+     *  DAT1       -
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <sqlite3.h>
+#include <SPI.h>
+#include <FS.h>
+#include "SD.h"
+//配置数据结构
+String keySize="";
+const int siteSize = 5;
+String site[siteSize];
+struct key {
+    String user;
+    String password;
+};
+
+const char* data = "Callback function called";
+static int callback(void *data, int argc, char **argv, char **azColName){
+    int i;
+    Serial.printf("%s: ", (const char*)data);
+    for (i = 0; i<argc; i++){
+        // 初始化一个空的字符串
+        String outputString = "";
+
+// 使用sprintf将输出格式化
+        char buffer[50];
+        sprintf(buffer, "%s = %s\n", azColName[i], argv[i] ? argv[i] : "NULL");
+
+// 将格式化后的字符串连接到outputString
+        outputString += buffer;
+
+// 现在outputString包含了格式化后的字符串
+        Serial.println(outputString);
+    }
+    Serial.printf("\n");
+    return 0;
+}
+
+int openDb(const char *filename, sqlite3 **db) {
+    int rc = sqlite3_open(filename, db);
+    if (rc) {
+        Serial.printf("Can't open database: %s\n", sqlite3_errmsg(*db));
+        return rc;
+    } else {
+        Serial.printf("Opened database successfully\n");
+    }
+    return rc;
+}
+
+char *zErrMsg = 0;
+int db_exec(sqlite3 *db, const char *sql) {
+    Serial.println(sql);
+    long start = micros();
+    int rc = sqlite3_exec(db, sql, callback, (void*)data, &zErrMsg);
+    if (rc != SQLITE_OK) {
+        Serial.printf("SQL error: %s\n", zErrMsg);
+        sqlite3_free(zErrMsg);
+    } else {
+        Serial.printf("Operation done successfully\n");
+    }
+    Serial.print(F("Time taken:"));
+    Serial.println(micros()-start);
+    return rc;
+}
+
+void setup() {
+    Serial.begin(115200);
+    sqlite3 *db1;
+
+    char *zErrMsg = 0;
+    int rc;
+
+    SPI.begin();
+    SD.begin();
+
+    sqlite3_initialize();
+
+    // Open database 1
+    if (openDb("/sd/key.db", &db1))
+        return;
+
+
+    rc = db_exec(db1, "SELECT * FROM site");
+    if (rc != SQLITE_OK) {
+        sqlite3_close(db1);
+
+        return;
+    }
+
+    rc = db_exec(db1, "SELECT * FROM key;");
+    if (rc != SQLITE_OK) {
+        sqlite3_close(db1);
+
+        return;
+    }
+
+
+    sqlite3_close(db1);
+
+
+}
+
+void loop() {
+}

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