diff --git a/rcserial.h b/rcserial.h
index fd9fad3..05209b9 100644
--- a/rcserial.h
+++ b/rcserial.h
@@ -88,6 +88,9 @@ void _rc_serial_add(const char* data, size_t len) {
 }
 
 void _handle_serial_send() {
+    static unsigned long lastRC = 0;
+    if (millis() - lastRC < 20) return;
+    lastRC = millis();
     mutex_enter_blocking(&serial_mut);
     if (rcSerial.command == 0) {
         while (rcSerial.command < 30 && !queue_is_empty(&serial_write_queue)) {