127 lines
2.8 KiB
Arduino
127 lines
2.8 KiB
Arduino
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/**
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*
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* Connect to AP and run in bash:
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*
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* > while true; do echo "PING"; sleep 0.1; done | websocat ws://192.168.4.1/ws
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*
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*/
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#include <Arduino.h>
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#ifdef ESP8266
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#include <ESP8266WiFi.h>
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#endif
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#ifdef ESP32
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#include <WiFi.h>
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#endif
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#include <ESPAsyncWebServer.h>
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#include <list>
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size_t msgCount = 0;
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size_t window = 100;
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std::list<uint32_t> times;
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void connect_wifi() {
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WiFi.mode(WIFI_AP);
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WiFi.softAP("esp-captive");
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// Serial.print("Connecting");
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// while (WiFi.status() != WL_CONNECTED) {
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// delay(500);
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// Serial.print(".");
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// }
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// Serial.println();
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// Serial.print("Connected, IP address: ");
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// Serial.println(WiFi.localIP());
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}
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void notFound(AsyncWebServerRequest* request) {
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request->send(404, "text/plain", "Not found");
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}
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AsyncWebServer server(80);
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AsyncWebSocket ws("/ws");
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// initial stack
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char* stack_start;
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void printStackSize() {
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char stack;
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Serial.print(F("stack size "));
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Serial.print(stack_start - &stack);
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Serial.print(F(" | Heap free:"));
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Serial.print(ESP.getFreeHeap());
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#ifdef ESP8266
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Serial.print(F(" frag:"));
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Serial.print(ESP.getHeapFragmentation());
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Serial.print(F(" maxFreeBlock:"));
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Serial.print(ESP.getMaxFreeBlockSize());
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#endif
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Serial.println();
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}
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void onWsEventEmpty(AsyncWebSocket* server, AsyncWebSocketClient* client, AwsEventType type, void* arg, uint8_t* data, size_t len) {
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msgCount++;
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Serial.printf("count: %d\n", msgCount);
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times.push_back(millis());
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while (times.size() > window)
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times.pop_front();
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if (times.size() == window)
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Serial.printf("%f req/s\n", 1000.0 * window / (times.back() - times.front()));
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printStackSize();
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client->text("PONG");
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}
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void serve_upload(AsyncWebServerRequest* request, const String& filename, size_t index, uint8_t* data, size_t len, bool final) {
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Serial.print("> onUpload ");
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Serial.print("index: ");
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Serial.print(index);
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Serial.print(" len:");
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Serial.print(len);
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Serial.print(" final:");
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Serial.print(final);
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Serial.println();
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}
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void setup() {
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char stack;
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stack_start = &stack;
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Serial.begin(115200);
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Serial.println("\n\n\nStart");
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Serial.printf("stack_start: %p\n", stack_start);
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connect_wifi();
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server.onNotFound(notFound);
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ws.onEvent(onWsEventEmpty);
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server.addHandler(&ws);
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server.on("/upload", HTTP_POST, [](AsyncWebServerRequest* request) { request->send(200); }, serve_upload);
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server.begin();
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Serial.println("Server started");
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}
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String msg = "";
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uint32_t count = 0;
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void loop() {
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// ws.cleanupClients();
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// count += 1;
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// // Concatenate some string, and clear it after some time
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// static unsigned long millis_string = millis();
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// if (millis() - millis_string > 1) {
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// millis_string += 100;
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// if (count % 100 == 0) {
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// // printStackSize();
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// // Serial.print(msg);
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// msg = String();
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// } else {
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// msg += 'T';
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// }
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// }
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}
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