Update firmware/generator.py

Co-authored-by: Giuseppe Lumia <[email protected]>

Author: Paolo Calao

firmware/generator.py

@@ -41,7 +41,9 @@ def sha2(file_path):
         return hashlib.sha256(f.read()).hexdigest()
 
 # Runs arduino-cli
-def arduino_cli(cli_path, args=[]):
+def arduino_cli(cli_path, args=None):
+    if args is None:
+        args=[]
     res = subprocess.run([cli_path, *args], capture_output=True, text=True, check=True)
     return res.stdout, res.stderr