Mark is asking for VIN number field fix #3967

firmware/CHANGELOG.md

@@ -32,8 +32,9 @@ Release template (copy/paste this for new release):
  - VVT minimum RPM setting #4545
  - Flexible ignition adder/trim tables #4586
  - Enforce board configuration overrides more strictly #4614
- - Startup Frame should scan for available hardware #4633
+ - rusEFI console Startup Frame should scan for available hardware #4633
  - Don't fire the engine without the ignition on (avoids USB keeping engine alive after ignition off) #4474
+ - Lua: function to access VIN setting #3967
 
 ### Fixed
  - Fuel Priming reset fix #4627

firmware/controllers/lua/lua_hooks.cpp

@@ -28,8 +28,12 @@ using namespace luaaa;
 
 static int lua_vin(lua_State* l) {
 	auto zeroBasedCharIndex = luaL_checkinteger(l, 1);
-	char value = engineConfiguration->vinNumber[zeroBasedCharIndex];
-	lua_pushnumber(l, value);
+	if (zeroBasedCharIndex < 0 || zeroBasedCharIndex > VIN_NUMBER_SIZE) {
+		lua_pushnil(l);
+	} else {
+		char value = engineConfiguration->vinNumber[zeroBasedCharIndex];
+		lua_pushnumber(l, value);
+	}
 	return 1;
 }