I am powering esp32 extranally because the usb is not enble to provide enough power for wifi application.after When I upload the code and open serial monitor in keeps repeating "connecting..." Again and again.and does not connect and show ip I Haven't hooked up pwm.
#include <WiFi.h>
#include <AsyncTCP.h>
#include <ESPAsyncWebSrv.h>
const char* ssid = "esp32";
const char* password = "Yassword";
const int led_pin = 14;
String slider_value = "0";
const int frequency = 5000;
const int led_channel = 0;
const int resolution = 8;
const char* input_parameter = "value";
AsyncWebServer server(80);
const char index_html[] PROGMEM = R"rawliteral(
<!DOCTYPE HTML><html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>ESP32 Brightness Control Web Server</title>
<style>
html {font-family: Times New Roman; display: inline-block; text-align: center;}
h2 {font-size: 2.3rem;}
p {font-size: 1.9rem;}
body {max-width: 400px; margin:0px auto; padding-bottom: 25px;}
.slider { -webkit-appearance: none; margin: 14px; width: 360px; height: 25px; background: #38c0ff ;
outline: none; -webkit-transition: .2s; transition: opacity .2s;}
.slider::-webkit-slider-thumb {-webkit-appearance: none; appearance: none; width: 35px; height: 35px; background:#01070a; cursor: pointer;}
.slider::-moz-range-thumb { width: 35px; height: 35px; background: #01070a; cursor: pointer; }
</style>
</head>
<body>
<h2>ESP32 Brightness Control Web Server</h2>
<p><span id="textslider_value">%SLIDERVALUE%</span></p>
<p><input type="range" onchange="updateSliderPWM(this)" id="pwmSlider" min="0" max="255" value="%SLIDERVALUE%" step="1" class="slider"></p>
<script>
function updateSliderPWM(element) {
var slider_value = document.getElementById("pwmSlider").value;
document.getElementById("textslider_value").innerHTML = slider_value;
console.log(slider_value);
var xhr = new XMLHttpRequest();
xhr.open("GET", "/slider?value="+slider_value, true);
xhr.send();
}
</script>
</body>
</html>
)rawliteral";
String processor(const String& var){
if (var == "SLIDERVALUE"){
return slider_value;
}
return String();
}
void setup(){
Serial.begin(115200);
ledcSetup(led_channel, frequency, resolution);
ledcAttachPin(led_pin, led_channel);
ledcWrite(led_channel, slider_value.toInt());
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting...");
}
Serial.println(WiFi.localIP());
server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
request->send_P(200, "text/html",index_html, processor);
});
server.on("/slider", HTTP_GET, [] (AsyncWebServerRequest *request) {
String message;
if (request->hasParam(input_parameter)) {
message = request->getParam(input_parameter)->value();
slider_value = message;
ledcWrite(led_channel, slider_value.toInt());
}
else {
message = "No message sent";
}
Serial.println(message);
request->send(200, "text/plain", "OK");
});
server.begin();
}
void loop() {
}