diff --git a/.hgignore b/.hgignore
new file mode 100644
--- /dev/null
+++ b/.hgignore
@@ -0,0 +1,5 @@
+# use glob syntax.
+syntax: glob
+
+*.o
+build/*
diff --git a/config.h b/config.h
--- a/config.h
+++ b/config.h
@@ -2,8 +2,8 @@
 #define CONFIG_H
 
 // Temperature sensor type
-#define MAX31855_TC_SENSOR
-//#define MAX31865_RTD_SENSOR
+//#define MAX31855_TC_SENSOR
+#define MAX31865_RTD_SENSOR
 
 
 // Virtual serial port transmit rate