diff --git a/11_write_factorytest_by_esptool.sh b/11_write_factorytest_by_esptool.sh
index 1e87caf..4156425 100755
--- a/11_write_factorytest_by_esptool.sh
+++ b/11_write_factorytest_by_esptool.sh
@@ -3,15 +3,20 @@
 # This script uploads the factory test firmware to an ESP device using esptool.py.
 
 # Check if esptool.py is installed
-if ! command -v esptool.py &> /dev/null
+if command -v esptool.py &> /dev/null
 then
-    echo "esptool.py could not be found. Please install it first."
-    exit 1
+   BUILD_TOOL="esptool.py"
+else
+   if ! command -v py &> /dev/null
+   then
+     echo "esptool.py nor py could not be found. Please install it first."
+     exit 1
+   fi
+   BUILD_TOOL="py -m esptool"
 fi
 
 # Find port - Cross-platform detection
 PORT=""
-
 # Detect OS and find appropriate port
 OS_TYPE=$(uname -s)
 case "$OS_TYPE" in
@@ -89,10 +94,10 @@
     echo "Partitions file not found at $PARTITIONS_PATH"
     exit 1
 fi
-if [ ! -f "$BOOT_APP0_PATH" ]; then
-    echo "Boot app0 file not found at $BOOT_APP0_PATH"
-    exit 1
-fi
+# if [ ! -f "$BOOT_APP0_PATH" ]; then
+#     echo "Boot app0 file not found at $BOOT_APP0_PATH"
+#     exit 1
+# fi
 if [ ! -f "$FIRMWARE_PATH" ]; then
     echo "Firmware file not found at $FIRMWARE_PATH"
     exit 1
@@ -105,7 +110,7 @@
 echo "Main firmware: $FIRMWARE_PATH"
 
 # Upload the complete firmware using esptool.py
-esptool.py --chip esp32 --port "$PORT" --baud 460800 write_flash -z \
+$BUILD_TOOL --chip esp32 --port "$PORT" --baud 460800 write_flash -z \
     0x1000 "$BOOTLOADER_PATH" \
     0x8000 "$PARTITIONS_PATH" \
     0x10000 "$FIRMWARE_PATH"