diff --git a/button.c b/button.c
new file mode 100644
index 0000000..8a7df7e
--- /dev/null
+++ b/button.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2017-2024 Oleg Borodin <onborodin@gmail.com>
+ */
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <avr/io.h>
+
+#include <button.h>
+#include <tool.h>
+
+typedef struct {
+    bool was_pressed;
+    bool strokes_ended;
+    uint16_t time_counter;
+    uint16_t released_time;
+    uint16_t push_counter;
+} button_t;
+
+button_t button;
+
+void button_init(void) {
+    /* D3 PD3: Set key input */
+    REG_SETDOWN_BIT(DDRD, PD3);
+    REG_SETUP_BIT(PORTD, PD3);
+}
+
+bool button_is_pressed(void) {
+    if (REG_BIT_VALUE(PIND, PD3)) {
+        return true;
+    }
+    return false;
+}
+
+uint8_t button_get(void) {
+    if (button.strokes_ended) {
+        uint8_t counter = button.push_counter;
+        button.was_pressed = false;
+        button.time_counter = 0;
+        button.push_counter = 0;
+        button.strokes_ended = false;
+        return counter;
+    }
+    return 0;
+}
+
+void button_reset(void) {
+    button.was_pressed = false;
+    button.time_counter = 0;
+    button.push_counter = 0;
+    button.strokes_ended = false;
+}
+
+#define BUTTON_TIME_PRESSED    100
+#define BUTTON_TIME_RELEASED   100
+#define BUTTON_RELEASED_TIME  1500
+
+void button_handle(void) {
+    if (!button.strokes_ended) {
+        if (!button.was_pressed) {
+            if (button_is_pressed()) {
+                button.time_counter++;
+                button.released_time++;
+            }
+            if (button.time_counter > BUTTON_TIME_PRESSED) {
+                button.time_counter = 0;
+                button.was_pressed = true;
+            }
+        } else {
+            if (!button_is_pressed()) {
+                button.time_counter++;
+            }
+            if (button.time_counter > BUTTON_TIME_RELEASED) {
+                button.time_counter = 0;
+                button.was_pressed = false;
+                button.push_counter++;
+                button.released_time = 0;
+            }
+        }
+        if (button.push_counter > 0) {
+            button.released_time++;
+            if (button.released_time > BUTTON_RELEASED_TIME) {
+                button.strokes_ended = true;
+            }
+        } else {
+            button.released_time = 0;
+        }
+    }
+}
diff --git a/button.h b/button.h
new file mode 100644
index 0000000..f3d2404
--- /dev/null
+++ b/button.h
@@ -0,0 +1,14 @@
+/*
+ * Copyright 2017-2024 Oleg Borodin <onborodin@gmail.com>
+ */
+
+#ifndef BUTTON_H_QWERTY
+#define BUTTON_H_QWERTY
+
+void button_init(void);
+void button_reset(void);
+bool button_is_pressed(void);
+void button_handle(void);
+uint8_t button_get(void);
+
+#endif