From 460ebc115df567940751e13c6c5aa7831afa6abb Mon Sep 17 00:00:00 2001
From: Roland Dobai <roland@espressif.com>
Date: Sun, 20 Nov 2022 17:31:21 +0100
Subject: [PATCH] Tools: Use bitstring package compatible with supported Python
 versions

Bitstring>=4 supports Python 3.7+ only. See:
https://github.com/scott-griffiths/bitstring/releases/tag/bitstring-4.0.1
---
 requirements.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/requirements.txt b/requirements.txt
index 69c78180fc..6896abf147 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,8 @@ python-socketio<5
 
 # esptool requirements (see components/esptool_py/esptool/setup.py)
 reedsolo>=1.5.3,<=1.5.4
-bitstring>=3.1.6
+# bitstring 4 dropped support for Python 3.6 and older
+bitstring>=3.1.6,<4
 ecdsa>=0.16.0
 
 # windows-curses are required in Windows command line but cannot be installed in MSYS2. A requirement like