diff --git a/avr/apps/network/main.asm b/avr/apps/network/main.asm
index e4fc8cc..54a1d1b 100644
--- a/avr/apps/network/main.asm
+++ b/avr/apps/network/main.asm
@@ -221,7 +221,7 @@ appNetworkHandlePingRequest_end:
 appNetworkHandleReeunumRequest:
   push xl
     push xh
-      rcall Utils_ReadUid                     ; r21:r20:r19:r18=uid (r16, X)
+      bigcall Utils_ReadUid                ; r21:r20:r19:r18=uid (r16, X)
     pop xh
   pop xl
   rcall NETMSG_Range_Read                     ; r20=range begin, r21=range end (none)
diff --git a/avr/devices/c01/main/main.asm b/avr/devices/c01/main/main.asm
index 06f527f..f4fa9b6 100644
--- a/avr/devices/c01/main/main.asm
+++ b/avr/devices/c01/main/main.asm
@@ -34,7 +34,8 @@
 ; generic
 
 .equ NET_BUFFERS_NUM              = 8
-.equ NET_BUFFERS_SIZE             = 32
+.equ NET_MSGNUMINBUF_SIZE         =  8 ; max buffer nums in ringbuffer (global incoming)
+.equ NET_IFACE_OUTMSGBUF_SIZE     =  8 ; max buffer nums in ringbuffer (per interface outbound)
 
 
 
@@ -60,9 +61,9 @@
 ;#define MODULES_UART_HW
 #define MODULES_UART_BITBANG
 #define MODULES_SPI_HW
-#define MODULES_ILI9341
+;#define MODULES_ILI9341
 ;#define MODULES_FONT_8X8
-#define MODULES_FONT_6X8
+;#define MODULES_FONT_6X8
 ;#define MODULES_UART_BITBANG
 ;#define MODULES_TWI_MASTER
 ;#define MODULES_LCD
diff --git a/avr/devices/c02/main/main.asm b/avr/devices/c02/main/main.asm
index dd1c8fc..1473cc9 100644
--- a/avr/devices/c02/main/main.asm
+++ b/avr/devices/c02/main/main.asm
@@ -36,7 +36,8 @@
 .equ STACK_SIZE                   = 256
 
 .equ NET_BUFFERS_NUM              = 8
-.equ NET_BUFFERS_SIZE             = 32
+.equ NET_MSGNUMINBUF_SIZE         =  8 ; max buffer nums in ringbuffer (global incoming)
+.equ NET_IFACE_OUTMSGBUF_SIZE     =  8 ; max buffer nums in ringbuffer (per interface outbound)