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badvision/webserver.ino

Created October 16, 2018 15:55
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  1. badvision created this gist Oct 16, 2018.
    140 changes: 140 additions & 0 deletions webserver.ino
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,140 @@
    #include <string>
    #include <WiFi.h>
    #include <WiFiClient.h>
    #include <WebServer.h>
    #include <ESPmDNS.h>
    #include "SSD1306.h"

    #define SDA 4
    #define SCL 15
    #define RST 16 //RST must be set by software

    #define DISPLAY_HEIGHT 64
    #define DISPLAY_WIDTH 128

    const char *ssid = "YOUR-SSID-HERE";
    const char *password = "YOUR-PASSWORD-HERE";

    WebServer server(80);

    SSD1306 display(0x3c, SDA, SCL, RST);

    const int led = 2; // LED will blink when there is activity

    void handleRoot() {
    digitalWrite(led, 1);
    char temp[500];
    int sec = millis() / 1000;
    int min = sec / 60;
    int hr = min / 60;
    snprintf(temp, 500, "<html><head><title>ESP32</title><style>\
    body {background-color:#cccccc; font-family:Arial,Helvetica,Sans-Serif; Color:#000088;}\
    div {display:inline-block; width:71px;}\
    </style></head><body>\
    <p>Uptime: %02d:%02d:%02d</p>\
    <script>\
    for(var i=0;i<40;i++){document.write('<div>Pin '+i+'<input type=\"checkbox\" onclick=\"setPin('+i+',this);\"></div>');}\
    function setPin(n,v){var req=new XMLHttpRequest(),u='/pin?num='+n+'&val='+(v.checked?1:0);req.open('GET',u);req.send();}\
    </script>\
    </body>\
    </html>",
    hr, min % 60, sec % 60);
    server.send(200, "text/html", temp);
    digitalWrite(led, 0);
    }

    void setPin() {
    char temp[41];
    int pinNum = server.arg("num").toInt();
    int newState = server.arg("val").toInt();
    snprintf(temp, 41, "<html><body>Pin %02d state: %1d</body></html>", pinNum, newState);
    server.send(200, "text/html", temp);
    digitalWrite(led, 0);
    pinMode(pinNum, OUTPUT);
    digitalWrite(pinNum, newState);
    }

    void handleNotFound() {
    digitalWrite(led, 1);
    String message = "File Not Found\n\n";
    message += "URI: ";
    message += server.uri();
    message += "\nMethod: ";
    message += (server.method() == HTTP_GET) ? "GET" : "POST";
    message += "\nArguments: ";
    message += server.args();
    message += "\n";

    for (uint8_t i = 0; i < server.args(); i++) {
    message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
    }

    server.send(404, "text/plain", message);
    digitalWrite(led, 0);
    }

    void initScreen() {
    display.init();
    display.flipScreenVertically();
    display.setContrast(255);
    display.setLogBuffer(5, 30);
    }

    void setup(void) {
    initScreen();
    pinMode(led, OUTPUT);
    digitalWrite(led, 0);

    Serial.begin(115200);
    WiFi.mode(WIFI_STA);
    WiFi.begin(ssid, password);
    Serial.println("");
    display.clear();
    // Print to the screen
    display.print("Trying: ");
    display.println(ssid);
    display.drawLogBuffer(0, 0);
    // Display it on the screen
    display.display();
    delay(500);

    // Wait for connection
    while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    }

    display.clear();
    // Print to the screen
    display.println("----------");
    display.print("Connected to ");
    display.println(ssid);
    display.print("IP: ");
    display.println(WiFi.localIP());

    Serial.println("");
    Serial.print("Connected to ");
    Serial.println(ssid);
    Serial.print("IP address: ");
    Serial.println(WiFi.localIP());

    if (MDNS.begin("esp32")) {
    Serial.println("MDNS responder started");
    display.println("MDNS responder started");
    }

    server.on("/", handleRoot);
    server.on("/pin", setPin);
    server.onNotFound(handleNotFound);
    server.begin();
    Serial.println("HTTP server started");
    display.println("HTTP server started");
    // Draw it to the internal screen buffer
    display.drawLogBuffer(0, 0);
    // Display it on the screen
    display.display();
    }

    void loop(void) {
    server.handleClient();
    }