2018-06-27 09:01:06 +02:00
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/*
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Copyright (c) 2015, Majenko Technologies
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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* * Neither the name of Majenko Technologies nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <WiFi.h>
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#include <WiFiClient.h>
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#include <WebServer.h>
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#include <ESPmDNS.h>
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const char *ssid = "YourSSIDHere";
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const char *password = "YourPSKHere";
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WebServer server(80);
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const int led = 13;
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void handleRoot() {
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digitalWrite(led, 1);
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char temp[400];
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int sec = millis() / 1000;
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int min = sec / 60;
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int hr = min / 60;
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snprintf(temp, 400,
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"<html>\
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<head>\
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<meta http-equiv='refresh' content='5'/>\
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<title>ESP32 Demo</title>\
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<style>\
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body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }\
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</style>\
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</head>\
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<body>\
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<h1>Hello from ESP32!</h1>\
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<p>Uptime: %02d:%02d:%02d</p>\
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<img src=\"/test.svg\" />\
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</body>\
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</html>",
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hr, min % 60, sec % 60
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);
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server.send(200, "text/html", temp);
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digitalWrite(led, 0);
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}
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void handleNotFound() {
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digitalWrite(led, 1);
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String message = "File Not Found\n\n";
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message += "URI: ";
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message += server.uri();
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message += "\nMethod: ";
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message += (server.method() == HTTP_GET) ? "GET" : "POST";
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message += "\nArguments: ";
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message += server.args();
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message += "\n";
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for (uint8_t i = 0; i < server.args(); i++) {
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message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
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}
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server.send(404, "text/plain", message);
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digitalWrite(led, 0);
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}
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void setup(void) {
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pinMode(led, OUTPUT);
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digitalWrite(led, 0);
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Serial.begin(115200);
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WiFi.mode(WIFI_STA);
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WiFi.begin(ssid, password);
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Serial.println("");
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// Wait for connection
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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 to ");
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Serial.println(ssid);
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Serial.print("IP address: ");
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Serial.println(WiFi.localIP());
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if (MDNS.begin("esp32")) {
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Serial.println("MDNS responder started");
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}
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server.on("/", handleRoot);
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server.on("/test.svg", drawGraph);
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server.on("/inline", []() {
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server.send(200, "text/plain", "this works as well");
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});
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server.onNotFound(handleNotFound);
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server.begin();
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Serial.println("HTTP server started");
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}
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void loop(void) {
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server.handleClient();
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2021-03-05 13:40:52 +02:00
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delay(2);//allow the cpu to switch to other tasks
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2018-06-27 09:01:06 +02:00
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}
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void drawGraph() {
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String out = "";
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char temp[100];
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out += "<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" width=\"400\" height=\"150\">\n";
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out += "<rect width=\"400\" height=\"150\" fill=\"rgb(250, 230, 210)\" stroke-width=\"1\" stroke=\"rgb(0, 0, 0)\" />\n";
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out += "<g stroke=\"black\">\n";
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int y = rand() % 130;
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for (int x = 10; x < 390; x += 10) {
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int y2 = rand() % 130;
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sprintf(temp, "<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" stroke-width=\"1\" />\n", x, 140 - y, x + 10, 140 - y2);
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out += temp;
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y = y2;
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}
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out += "</g>\n</svg>\n";
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server.send(200, "image/svg+xml", out);
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}
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