From 0d3a077d472886649cf4400ca0507173c140393e Mon Sep 17 00:00:00 2001
From: Jakub Kocka <jakub.kocka@espressif.com>
Date: Wed, 20 Sep 2023 12:57:20 +0200
Subject: [PATCH] fix(loader): Could not open serial port message adjusted

---
 esptool/loader.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/esptool/loader.py b/esptool/loader.py
index 88f1b77d4..3e45bec01 100644
--- a/esptool/loader.py
+++ b/esptool/loader.py
@@ -301,8 +301,11 @@ def __init__(self, port=DEFAULT_PORT, baud=ESP_ROM_BAUD, trace_enabled=False):
         if isinstance(port, str):
             try:
                 self._port = serial.serial_for_url(port)
-            except serial.serialutil.SerialException:
-                raise FatalError(f"Could not open {port}, the port doesn't exist")
+            except serial.serialutil.SerialException as e:
+                raise FatalError(
+                    f"Could not open {port}, the port is busy or doesn't exist."
+                    f"\n({e})\n"
+                )
         else:
             self._port = port
         self._slip_reader = slip_reader(self._port, self.trace)