@@ -69,6 +69,22 @@ def send_keys(self, down_keys, timeout_ms=100):
 return True
 return False
 
+def release_all(self):
+for i in range(_KEY_REPORT_LEN):
+self._key_reports[0][i] = 0
+if self.send_report(self._key_reports[0], 200):
+return True
+return False
+
+"""Example usage
+
+k = KeyboardInterface()
+usb.device.get().init(k, builtin_driver=True)
+key = [4] #It clicks letter A (refer KeyCode class)
+k.send_keys(key)
+k.release_all()
+"""
+
 
 # HID keyboard report descriptor
 #