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raymond |
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#include <Arduino.h>
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#include <FS.h>
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#include <LittleFS.h>
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#include <AsyncFsWebServer.h> // https://github.com/cotestatnt/async-esp-fs-webserver/
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#define FILESYSTEM LittleFS
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AsyncFsWebServer server(FILESYSTEM, 80, "myserver");
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#ifndef LED_BUILTIN
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#define LED_BUILTIN 2
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#endif
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// In order to set SSID and password open the /setup webserver page
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// const char* ssid;
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// const char* password;
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const char* hostname = "heap-chart";
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// Timezone definition to get properly time from NTP server
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#define MYTZ "CET-1CEST,M3.5.0,M10.5.0/3"
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struct tm Time;
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//////////////////////////////// WebSocket Handler /////////////////////////////
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void onWsEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len){
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switch (type) {
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case WS_EVT_DISCONNECT:
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Serial.print("WebSocket client disconnected!\n");
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break;
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case WS_EVT_CONNECT: {
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IPAddress ip = client->remoteIP();
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Serial.printf("WebSocket client %d.%d.%d.%d connected.\n", ip[0], ip[1], ip[2], ip[3]);
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client->printf("%s", "{\"Connected\": true}");
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}
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break;
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default:
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break;
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}
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}
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//////////////////////////////// NTP Time /////////////////////////////////////
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void getUpdatedtime(const uint32_t timeout)
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{
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uint32_t start = millis();
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Serial.print("Sync time...");
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while (millis() - start < timeout && Time.tm_year <= (1970 - 1900)) {
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time_t now = time(nullptr);
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Time = *localtime(&now);
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delay(5);
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}
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Serial.println(" done.");
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}
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//////////////////////////////// Filesystem /////////////////////////////////////////
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bool startFilesystem() {
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if (FILESYSTEM.begin()){
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server.printFileList(FILESYSTEM, "/", 2), Serial;
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return true;
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}
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else {
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Serial.println("ERROR on mounting filesystem. It will be reformatted!");
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FILESYSTEM.format();
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ESP.restart();
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}
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return false;
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}
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void setup() {
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pinMode(LED_BUILTIN, OUTPUT);
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Serial.begin(115200);
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// FILESYSTEM INIT
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startFilesystem();
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// Try to connect to WiFi (will start AP if not connected after timeout)
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if (!server.startWiFi(10000)) {
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Serial.println("\nWiFi not connected! Starting AP mode...");
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server.startCaptivePortal("ESP_AP", "123456789", "/setup");
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}
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// Enable ACE FS file web editor and add FS info callback function
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server.enableFsCodeEditor();
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// Start server with custom websocket event handler
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server.init(onWsEvent);
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Serial.print(F("ESP Web Server started on IP Address: "));
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Serial.println(server.getServerIP());
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Serial.println(F(
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"This is \"highcharts.ino\" example.\n"
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"Open /setup page to configure optional parameters.\n"
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"Open /edit page to view, edit or upload example or your custom webserver source files."
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));
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}
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void loop() {
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// Send ESP system time (epoch) and heap stats to WS client
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static uint32_t sendToClientTime;
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if (millis() - sendToClientTime > 1000 ) {
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sendToClientTime = millis();
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digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
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time_t now = time(nullptr);
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using namespace AsyncFSWebServer;
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CJSON::Json doc;
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doc.setBool("addPoint", true);
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doc.setNumber("timestamp", (double)now);
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#ifdef ESP32
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doc.setNumber("totalHeap", (double)heap_caps_get_free_size(0));
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doc.setNumber("maxBlock", (double)heap_caps_get_largest_free_block(0));
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#elif defined(ESP8266)
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uint32_t free;
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uint32_t max;
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ESP.getHeapStats(&free, &max, nullptr);
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doc.setNumber("totalHeap", (double)free);
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doc.setNumber("maxBlock", (double)max);
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#endif
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String msg = doc.serialize();
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server.wsBroadcast(msg.c_str());
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}
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}
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