HomeTempMonitor/WebServer.cpp at main · PaekHyun/HomeTempMonitor · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
/*
 * WebServer.cpp - WiFi 웹서버 구현 (LittleFS 기반)
 */
#include "WebServer.h"
#include <time.h>

DataWebServer::DataWebServer(DataLogger &logger)
  : _logger(logger), _server(80), _running(false), _timeSyncCallback(nullptr) {
}

void DataWebServer::start(const char *ssid, const char *password) {
  Serial.printf("[WebServer] Connecting to WiFi: %s", ssid);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  int attempts = 0;
  while (WiFi.status() != WL_CONNECTED && attempts < 40) {
    delay(500);
    Serial.print(".");
    attempts++;
  }
  Serial.println();

  if (WiFi.status() != WL_CONNECTED) {
    Serial.println("[WebServer] WiFi connection FAILED!");
    _running = false;
    return;
  }

  Serial.println("[WebServer] WiFi connected! IP: " + WiFi.localIP().toString());

  // NTP 동기화
  configTime(9 * 3600, 0, "pool.ntp.org", "time.nist.gov");

  struct tm timeinfo;
  int ntp_tries = 0;
  while (!getLocalTime(&timeinfo) && ntp_tries < 15) {
    delay(500);
    ntp_tries++;
  }
  if (getLocalTime(&timeinfo)) {
    Serial.printf("[WebServer] NTP synced: %s", asctime(&timeinfo));
    if (_timeSyncCallback) _timeSyncCallback();
  }

  _server.begin();
  _running = true;
}

void DataWebServer::stop() {
  _server.stop();
  WiFi.disconnect(true);
  WiFi.mode(WIFI_OFF);
  _running = false;
  Serial.println("[WebServer] Stopped.");
}

bool DataWebServer::isRunning() {
  return _running;
}

void DataWebServer::handleClient() {
  if (!_running) return;

  WiFiClient client = _server.available();
  if (!client) return;

  String request = "";
  unsigned long timeout = millis() + 3000;
  while (client.connected() && millis() < timeout) {
    if (client.available()) {
      char c = client.read();
      request += c;
      if (request.endsWith("\r\n\r\n")) break;
    }
  }

  if (request.length() > 0) {
    handleRequest(client, request);
  }

  delay(10);
  client.stop();
}

void DataWebServer::handleRequest(WiFiClient &client, const String &request) {
  Serial.println("[WebServer] Request: " + request.substring(0, request.indexOf('\r')));

  if (request.indexOf("GET / ") >= 0 || request.indexOf("GET /index.html") >= 0) {
    sendHTML(client);
  }
  else if (request.indexOf("GET /data.csv") >= 0) {
    sendCSV(client);
  }
  else if (request.indexOf("GET /data.json") >= 0) {
    sendJSON(client);
  }
  else if (request.indexOf("GET /format") >= 0) {
    _logger.format();
    sendHTML(client);
  }
  else {
    send404(client);
  }
}

void DataWebServer::sendHTML(WiFiClient &client) {
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/html; charset=utf-8");
  client.println("Connection: close");
  client.println();

  client.println("<!DOCTYPE html><html><head>");
  client.println("<meta charset='utf-8'>");
  client.println("<meta name='viewport' content='width=device-width,initial-scale=1'>");
  client.println("<title>Home Temp Monitor</title>");
  client.println("<style>");
  client.println("body{font-family:system-ui,sans-serif;max-width:600px;margin:40px auto;padding:0 20px;background:#f5f5f5}");
  client.println("h1{color:#333;border-bottom:2px solid #4CAF50;padding-bottom:10px}");
  client.println(".card{background:#fff;border-radius:8px;padding:20px;margin:15px 0;box-shadow:0 2px 4px rgba(0,0,0,0.1)}");
  client.println(".btn{display:inline-block;padding:12px 24px;margin:5px;border-radius:6px;text-decoration:none;color:#fff;font-weight:bold}");
  client.println(".btn-green{background:#4CAF50}.btn-red{background:#f44336}.btn-blue{background:#2196F3}");
  client.println(".info{color:#666;font-size:14px}");
  client.println(".warn{color:#f44336;font-weight:bold}");
  client.println("</style></head><body>");
  client.println("<h1>🏠 Home Temp Monitor</h1>");

  client.println("<div class='card'>");
  client.printf("<h2>📊 Data Records: %lu</h2>", _logger.getRecordCount());
  client.printf("<p class='info'>File size: %u bytes</p>", _logger.getFileSize());
  client.printf("<p class='info'>Flash: %u / %u bytes used</p>",
    _logger.getUsedSpace(), _logger.getTotalSpace());
  client.println("<br>");
  client.println("<a href='/data.csv' class='btn btn-green'>📥 Download CSV</a>");
  client.println("<a href='/data.json' class='btn btn-blue'>📋 View JSON</a>");
  client.println("</div>");

  client.println("<div class='card'>");
  client.println("<h2>⚙️ Settings</h2>");
  client.println("<a href='/format' class='btn btn-red' onclick=\"return confirm('Erase ALL data?')\">🗑️ Format Storage</a>");
  client.println("<p class='warn'>⚠️ Format erases all stored data permanently!</p>");
  client.println("</div>");

  client.println("<div class='card'>");
  client.println("<h2>ℹ️ Info</h2>");
  client.println("<p class='info'>• Sensor: SHT40 (I2C)</p>");
  client.println("<p class='info'>• Display: 2.9\" E-Paper BWR (SPI)</p>");
  client.println("<p class='info'>• Storage: Internal Flash (LittleFS)</p>");
  client.println("<p class='info'>• RTC: DS3231 (I2C)</p>");
  client.println("<p class='info'>• Interval: 5 minutes</p>");
  client.println("<p class='info'>• Battery: 10000mAh Li-Po</p>");
  client.println("</div>");

  client.println("</body></html>");
}

void DataWebServer::sendCSV(WiFiClient &client) {
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/csv; charset=utf-8");
  client.println("Content-Disposition: attachment; filename=\"temp_data.csv\"");
  client.println("Connection: close");
  client.println();

  _logger.readAllCSV(client);
}

void DataWebServer::sendJSON(WiFiClient &client) {
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: application/json; charset=utf-8");
  client.println("Connection: close");
  client.println();

  _logger.readAllJSON(client);
}

void DataWebServer::send404(WiFiClient &client) {
  client.println("HTTP/1.1 404 Not Found");
  client.println("Content-Type: text/plain");
  client.println("Connection: close");
  client.println();
  client.println("404 - Not Found");
}