From d9cf69ba0cb9d02814cb52306d4317dc2f706b3d Mon Sep 17 00:00:00 2001
From: elral <3263285+elral@users.noreply.github.com>
Date: Thu, 21 Oct 2021 10:11:21 +0200
Subject: [PATCH] avoid compilation error for STM32

---
 utility/HeaterSim.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utility/HeaterSim.cpp b/utility/HeaterSim.cpp
index 8c546c4..305ba68 100644
--- a/utility/HeaterSim.cpp
+++ b/utility/HeaterSim.cpp
@@ -70,7 +70,7 @@ void HeaterSim::CalcTemperature()
 {
 	float rate                  = LN2/_halfTimeCooling;	 
 	unsigned long currentTime   = millis();
-	if (currentTime >= _lastTime) _deltams = max(currentTime - _lastTime,1);
+	if (currentTime >= _lastTime) _deltams = max(currentTime - _lastTime,1UL);
 	_deltaTime                  = _deltams/ 1000.0f;
 	float deltaTemp             = _boilerTemp - _ambientTemp;
 	float deltaTempAfterCooling = deltaTemp*exp(-rate*_deltaTime);