From 85ea4e995a75abe061f6fc375ea0481084dddd43 Mon Sep 17 00:00:00 2001 From: schererleander Date: Tue, 20 Jan 2026 08:34:54 +0100 Subject: initial commit --- .../serversentevents/main/main.cpp | 95 ++++++++++++++++++++++ 1 file changed, 95 insertions(+) create mode 100644 libraries/ESP_Async_WebServer/idf_component_examples/serversentevents/main/main.cpp (limited to 'libraries/ESP_Async_WebServer/idf_component_examples/serversentevents/main/main.cpp') diff --git a/libraries/ESP_Async_WebServer/idf_component_examples/serversentevents/main/main.cpp b/libraries/ESP_Async_WebServer/idf_component_examples/serversentevents/main/main.cpp new file mode 100644 index 0000000..59a1f59 --- /dev/null +++ b/libraries/ESP_Async_WebServer/idf_component_examples/serversentevents/main/main.cpp @@ -0,0 +1,95 @@ +// SPDX-License-Identifier: LGPL-3.0-or-later +// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov + +// +// SSE example +// + +#include +#include +#include + +#include + +static const char *htmlContent PROGMEM = R"( + + + + Server-Sent Events + + + +

Open your browser console!

+ + +)"; + +static const size_t htmlContentLength = strlen_P(htmlContent); + +static AsyncWebServer server(80); +static AsyncEventSource events("/events"); + +void setup() { + Serial.begin(115200); + +#ifndef CONFIG_IDF_TARGET_ESP32H2 + WiFi.mode(WIFI_AP); + WiFi.softAP("esp-captive"); +#endif + + // curl -v http://192.168.4.1/ + server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) { + // need to cast to uint8_t* + // if you do not, the const char* will be copied in a temporary String buffer + request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength); + }); + + events.onConnect([](AsyncEventSourceClient *client) { + Serial.printf("SSE Client connected! ID: %" PRIu32 "\n", client->lastId()); + client->send("hello!", NULL, millis(), 1000); + }); + + events.onDisconnect([](AsyncEventSourceClient *client) { + Serial.printf("SSE Client disconnected! ID: %" PRIu32 "\n", client->lastId()); + }); + + server.addHandler(&events); + + server.begin(); +} + +static uint32_t lastSSE = 0; +static uint32_t deltaSSE = 3000; + +static uint32_t lastHeap = 0; + +void loop() { + uint32_t now = millis(); + if (now - lastSSE >= deltaSSE) { + events.send(String("ping-") + now, "heartbeat", now); + lastSSE = millis(); + } + + if (now - lastHeap >= 2000) { + Serial.printf("Free heap: %" PRIu32 "\n", ESP.getFreeHeap()); + lastHeap = now; + } +} -- cgit v1.3.1