From bba998bce09bc5139eb4ca7a05b0279f4083ff88 Mon Sep 17 00:00:00 2001
From: Mikael Falkvidd <github@mjo.se>
Date: Fri, 29 Jan 2021 14:33:48 +0100
Subject: [PATCH] Fix farenheit conversion

When temperature in C was below 0, the conversion to F was wrong due to
treating the C value as unsigned integer instead of signed integer.

See http://bit.ly/3ckRfxp for more information.

Thanks to hoggin for reporting this problem.
---
 libraries/SI7021/SI7021.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/SI7021/SI7021.cpp b/libraries/SI7021/SI7021.cpp
index c51ab6b..4f929d1 100644
--- a/libraries/SI7021/SI7021.cpp
+++ b/libraries/SI7021/SI7021.cpp
@@ -38,7 +38,7 @@ bool SI7021::sensorExists() {
 }
 
 int SI7021::getFahrenheitHundredths() {
-    unsigned int c = getCelsiusHundredths();
+    int c = getCelsiusHundredths();
     return (1.8 * c) + 3200;
 }