diff --git a/avr/devices/n12/n12_main.asm b/avr/devices/n12/n12_main.asm
index 1ca1e97..4bb6d3d 100644
--- a/avr/devices/n12/n12_main.asm
+++ b/avr/devices/n12/n12_main.asm
@@ -14,7 +14,7 @@
 ; This is for the full system (i.e. not the boot loader).
 ; ***************************************************************************
 
-.equ clock=1000000 ; Define the clock frequency
+.equ clock=8000000 ; Define the clock frequency
 
 
 
@@ -47,11 +47,11 @@
 #define MODULES_TWI_MASTER
 ;#define MODULES_LCD
 ;#define LCD_MINIMAL_FONT
-#define MODULES_SI7021
+;#define MODULES_SI7021
 #define MODULES_STATS
 ;#define MODULES_CNY70
-#define MODULES_REED
-;#define MODULES_OWI_MASTER
+;#define MODULES_REED
+#define MODULES_OWI_MASTER
 ;#define MODULES_DS18B20