From f81b8a0745b62c6694825309035ef8179a380566 Mon Sep 17 00:00:00 2001
From: trivialkettle <126059809+trivialkettle@users.noreply.github.com>
Date: Tue, 15 Oct 2024 16:39:09 +0200
Subject: [PATCH] Remove busy loop from rx_thread

The rx_thread executed a busy loop and loaded a single core to 100%. This change reduces the load significantly.
---
 pyusbtin/usbtin.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pyusbtin/usbtin.py b/pyusbtin/usbtin.py
index 679353b..6aa5e0e 100644
--- a/pyusbtin/usbtin.py
+++ b/pyusbtin/usbtin.py
@@ -274,7 +274,11 @@ def rx_thread(self):
         while self.rx_thread_state == USBtin.RX_THREAD_RUNNING:
             # fetch bytes if available
             rxcount = self.serial_port.inWaiting()
-            if rxcount > 0:
+            if rxcount == 0:
+                # if no data is available, sleep for 10ms to avoid busy looping
+                sleep(0.01)
+                continue
+            else:
                 # fetch all data from serial buffer
                 buf = self.serial_port.read(rxcount)
                 if PY_VERSION == 2: