From 10828bc6b825f87cbfec2bcf40a122eccfda3612 Mon Sep 17 00:00:00 2001
From: Asbelos <asbelos@btinternet.com>
Date: Fri, 17 Dec 2021 21:19:55 +0000
Subject: [PATCH] catch bad params in F

---
 DCCEXParser.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/DCCEXParser.cpp b/DCCEXParser.cpp
index 4ed07af..d35db0b 100644
--- a/DCCEXParser.cpp
+++ b/DCCEXParser.cpp
@@ -485,6 +485,7 @@ void DCCEXParser::parse(Print *stream, byte *com, RingStream * ringStream)
         return;
 
     case 'F': // New command to call the new Loco Function API <F cab func 1|0>
+        if(params!=3) break; 
         if (Diag::CMD)
             DIAG(F("Setting loco %d F%d %S"), p[0], p[1], p[2] ? F("ON") : F("OFF"));
         DCC::setFn(p[0], p[1], p[2] == 1);