diff --git a/main/main.c b/main/main.c
index c703f14..e421049 100644
--- a/main/main.c
+++ b/main/main.c
@@ -8,24 +8,23 @@
 #include "esp_log.h"
 #include "nvs_flash.h"
 #include <esp_http_server.h>
+#include "driver/gpio.h"
 
 #define WIFI_SSID "AndroidAP"
 #define WIFI_PASS "uyts6533"
 
+#define ESP_INTR_FLAG_DEFAULT 0
+
+uint8_t led_state = 0;
 
 // Event group
 static EventGroupHandle_t wifi_event_group;
 const int CONNECTED_BIT = BIT0;
+static xQueueHandle gpio_evt_queue = NULL;
 
 static char* resp_str ="\
 		<input type=\"submit\" name=\"lamp_state\" onclick=\"sendState(this.value)\" value=\"ON\"> \
 		<input type=\"submit\" name=\"lamp_state\" onclick=\"sendState(this.value)\" value=\"OFF\"> \
-		<label class=\"switch\">\
-			<input type=\"checkbox\">\
-			<span class=\"slider\"></span>\
-		</label>\
-		</form> \
-		\
 		<input type=\"range\" min=\"0\" max=\"100\" value=\"0\" oninput=\"sendSlider(this.value)\" class=\"slider\" id=\"myRange\"> \
 		<script> \
 		function sendSlider(data) { \
@@ -53,6 +52,32 @@ static const httpd_uri_t default_uri = {
     .handler   = &default_get_handler
 };
 
+static void IRAM_ATTR gpio_isr_handler(void* arg)
+{
+    uint32_t gpio_num = (uint32_t) arg;
+    xQueueSendFromISR(gpio_evt_queue, &gpio_num, NULL);
+}
+
+static void gpio_task(void* arg)
+{
+    printf("GPIO task started\n");
+    uint32_t io_num;
+    for(;;) {
+        if(xQueueReceive(gpio_evt_queue, &io_num, portMAX_DELAY)) {
+            printf("GPIO[%d] intr, val: %d\n", io_num, gpio_get_level(io_num));
+        }
+    }
+    led_state^=1;
+    if(led_state){
+        ledc_set_duty(ledc_channel.speed_mode, ledc_channel.channel, 1<<11);
+        ledc_update_duty(ledc_channel.speed_mode, ledc_channel.channel);
+    }
+    else{
+        ledc_set_duty(ledc_channel.speed_mode, ledc_channel.channel, 0);
+        ledc_update_duty(ledc_channel.speed_mode, ledc_channel.channel);
+    }
+}
+
 // Wifi event handler
 static esp_err_t event_handler(void *ctx, system_event_t *event)
 {
@@ -81,6 +106,19 @@ static esp_err_t event_handler(void *ctx, system_event_t *event)
 // Main application
 void app_main()
 {
+    gpio_config_t io_conf;
+    io_conf.intr_type = GPIO_PIN_INTR_NEGEDGE;
+    io_conf.pin_bit_mask = (1ULL<<17);
+    io_conf.mode = GPIO_MODE_INPUT;
+    io_conf.pull_down_en = 0;
+    io_conf.pull_up_en = 1;
+    gpio_config(&io_conf);
+
+    gpio_evt_queue = xQueueCreate(10, sizeof(uint32_t));
+    xTaskCreate(&gpio_task, "gpio_task", 2048, NULL, 10, NULL);
+    gpio_install_isr_service(ESP_INTR_FLAG_DEFAULT);
+    gpio_isr_handler_add(17, gpio_isr_handler, (void*) 17);
+
 	// disable the default wifi logging
 	esp_log_level_set("wifi", ESP_LOG_NONE);