diff --git a/avr/apps/stats/main.asm b/avr/apps/stats/main.asm
index e3cb904..f0b0a76 100644
--- a/avr/apps/stats/main.asm
+++ b/avr/apps/stats/main.asm
@@ -53,6 +53,15 @@ AppStats_Fini:
 ;
 
 AppStats_OnEveryMinute:
+  push r15
+    in r15, SREG
+    cli
+    rcall AppStats_OnEveryMinute_noIrq
+    out SREG, r15
+  pop r15
+  ret
+
+AppStats_OnEveryMinute_noIrq:
   ldi yl, LOW(netInterfaceData)
   ldi yh, HIGH(netInterfaceData)
   rcall AppNetwork_SendRxdStats     ; debug
diff --git a/avr/devices/n20/main.asm b/avr/devices/n20/main.asm
index 8efd2b8..5dc6bce 100644
--- a/avr/devices/n20/main.asm
+++ b/avr/devices/n20/main.asm
@@ -44,7 +44,7 @@
 ; ---------------------------------------------------------------------------
 ; generic
 
-.equ NET_BUFFERS_NUM            = 6
+.equ NET_BUFFERS_NUM            = 4
 .equ NET_BUFFERS_SIZE           = 32
 
 
@@ -57,21 +57,21 @@
 #define MODULES_LED_SIMPLE
 #define MODULES_NETWORK
 #define MODULES_UART_BITBANG
-#define MODULES_TWI_MASTER
+;#define MODULES_TWI_MASTER
 ;#define MODULES_LCD
 ;#define LCD_MINIMAL_FONT
-#define MODULES_SI7021
+;#define MODULES_SI7021
 ;#define MODULES_STATS
 ;#define MODULES_OWI_MASTER
 ;#define MODULES_DS18B20
-#define MODULES_MOTION
+;#define MODULES_MOTION
 ;#define MODULES_TCRT1000
 ;#define MODULES_CCS811
 
 #define APPS_NETWORK
-#define APPS_MOTION
+;#define APPS_MOTION
 ;#define APPS_DOOR
-#define APPS_REPORTSENSORS
+;#define APPS_REPORTSENSORS
 #define APPS_STATS
 
 
diff --git a/avr/modules/uart_bitbang2/iface.asm b/avr/modules/uart_bitbang2/iface.asm
index b814def..5bfcbde 100644
--- a/avr/modules/uart_bitbang2/iface.asm
+++ b/avr/modules/uart_bitbang2/iface.asm
@@ -25,8 +25,7 @@
 
 .dseg
 
-uart_bitbang_iface: .byte NET_IFACE_SIZE
-
+uart_bitbang_iface:     .byte NET_IFACE_SIZE
 
 
 
@@ -198,7 +197,7 @@ uartBitbang_receiveNextPkg_end:
 
 uartBitbang_receiveAndCheckPkg:
   ldd r16, Y+NET_IFACE_OFFS_ADDRESS
-  ldi r17, (NET_BUFFERS_SIZE-2)
+  ldi r17, (NET_BUFFERS_SIZE-4)
   push xl
     push xh
       rcall uartBitbang_ReceivePacketIntoBuffer ; (r16, r17, r18, r19, r20, r21, r22, X)