diff --git a/avr/devices/t03/main.asm b/avr/devices/t03/main.asm
index 46a3853..a7088a4 100644
--- a/avr/devices/t03/main.asm
+++ b/avr/devices/t03/main.asm
@@ -25,7 +25,7 @@
 .equ clock=8000000 ; Define the clock frequency
 
 ;.equ SEND_DEVICE_EVERY = 3000
-.equ SEND_DEVICE_EVERY = 350    ; every 30s
+.equ SEND_DEVICE_EVERY = 100    ; every 10s
 .equ SEND_STATS_EVERY  = 600    ; every minute
 
 .nolist
@@ -206,6 +206,7 @@ onSystemTimerTick:
   rcall maybeSendDeviceMsg
   rcall maybeSendTStatsMsg
   rcall maybeSendRStatsMsg
+  rcall maybeSendMStatsMsg
   rcall TtyOnUart1_Periodically
   ret
 
@@ -250,11 +251,16 @@ initModules:
   ldi r16, HIGH(SEND_STATS_EVERY)
   sts sendTStatsCounter+1, r16
 
-  ldi r16, LOW(SEND_STATS_EVERY)
+  ldi r16, LOW(SEND_STATS_EVERY+10)
   sts sendRStatsCounter, r16
-  ldi r16, HIGH(SEND_STATS_EVERY)
+  ldi r16, HIGH(SEND_STATS_EVERY+10)
   sts sendRStatsCounter+1, r16
 
+  ldi r16, LOW(SEND_STATS_EVERY+20)
+  sts sendMStatsCounter, r16
+  ldi r16, HIGH(SEND_STATS_EVERY+20)
+  sts sendMStatsCounter+1, r16
+
   ret
 ; @end
 
@@ -285,6 +291,7 @@ initModules:
 .include "modules/network/msg/device-w.asm"
 .include "modules/network/msg/sendstats-w.asm"
 .include "modules/network/msg/recvstats-w.asm"
+.include "modules/network/msg/memstats-w.asm"
 
 .include "modules/uart_hw/defs.asm"
 .include "modules/uart_hw/lowlevel.asm"
@@ -348,12 +355,8 @@ maybeSendTStatsMsg:
     rcall NETMSG_SendStats_Write             ; (R16, R17, R18, R19, R20, R21, Z)
     sbiw xh:xl, 1
   pop r16
-  push r16
-    rcall NET_Interface_AddOutgoingMsgNum   ; (R17, R18, X)
-  pop r16
-  brcs maybeSendTStatsMsg_resetCounter
-  rcall NET_Buffer_ReleaseByNum             ; (R16, X)
-  rjmp maybeSendTStatsMsg_end
+  rcall NET_Interface_AddOrReleaseOutMsg     ; (R16, R17, R18, X)
+  brcc maybeSendTStatsMsg_end
   ; reset counter
 maybeSendTStatsMsg_resetCounter:
   ldi r24, LOW(SEND_STATS_EVERY)
@@ -383,12 +386,8 @@ maybeSendRStatsMsg:
     rcall NETMSG_RecvStats_Write             ; (R16, R17, R18, R19, R20, R21, Z)
     sbiw xh:xl, 1
   pop r16
-  push r16
-    rcall NET_Interface_AddOutgoingMsgNum   ; (R17, R18, X)
-  pop r16
-  brcs maybeSendRStatsMsg_resetCounter
-  rcall NET_Buffer_ReleaseByNum             ; (R16, X)
-  rjmp maybeSendRStatsMsg_end
+  rcall NET_Interface_AddOrReleaseOutMsg     ; (R16, R17, R18, X)
+  brcc maybeSendRStatsMsg_end
   ; reset counter
 maybeSendRStatsMsg_resetCounter:
   ldi r24, LOW(SEND_STATS_EVERY)
@@ -401,6 +400,37 @@ maybeSendRStatsMsg_end:
 
 
 
+maybeSendMStatsMsg:
+  ldi yl, LOW(ttyOnUart1_iface)
+  ldi yh, HIGH(ttyOnUart1_iface)
+  
+  lds r24, sendMStatsCounter
+  lds r25, sendMStatsCounter+1
+  sbiw r25:r24, 1
+  brne maybeSendMStatsMsg_storeCounter
+  ; send device msg
+  rcall NET_Buffer_Alloc                    ; (R16, R17, X)
+;  brcc maybeSendTStatsMsg_resetCounter
+  brcc maybeSendMStatsMsg_end
+  push r16
+    adiw xh:xl, 1
+    rcall NETMSG_MemStats_Write             ; (R16, R17, R18, R19, R20, R21)
+    sbiw xh:xl, 1
+  pop r16
+  rcall NET_Interface_AddOrReleaseOutMsg    ; (R16, R17, R18, X)
+  brcc maybeSendMStatsMsg_end
+  ; reset counter
+maybeSendMStatsMsg_resetCounter:
+  ldi r24, LOW(SEND_STATS_EVERY)
+  ldi r25, HIGH(SEND_STATS_EVERY)
+maybeSendMStatsMsg_storeCounter:
+  sts sendMStatsCounter, r24
+  sts sendMStatsCounter+1, r25
+maybeSendMStatsMsg_end:
+  ret
+
+
+
 checkRecvdMsg:
   ldi yl, LOW(ttyOnUart1_iface)
   ldi yh, HIGH(ttyOnUart1_iface)
@@ -503,6 +533,7 @@ programRamBegin:
   deviceCounter:     .byte 2
   sendTStatsCounter: .byte 2
   sendRStatsCounter: .byte 2
+  sendMStatsCounter: .byte 2
 programRamEnd:
 
 
diff --git a/avr/modules/network/msg/memstats-w.asm b/avr/modules/network/msg/memstats-w.asm
new file mode 100644
index 0000000..00ac3a0
--- /dev/null
+++ b/avr/modules/network/msg/memstats-w.asm
@@ -0,0 +1,69 @@
+; ***************************************************************************
+; copyright   : (C) 2025 by Martin Preuss
+; email       : martin@libchipcard.de
+;
+; ***************************************************************************
+; * This file is part of the project "AqHome".                              *
+; * Please see toplevel file COPYING of that project for license details.   *
+; ***************************************************************************
+
+
+
+; ---------------------------------------------------------------------------
+; @routine NETMSG_MemStats_Write @global
+;
+; @param Y pointer to device to write msg for
+; @param X pointer to buffer to write to
+; @clobbers R16, R17, R18, R19, R20, R21
+
+NETMSG_MemStats_Write:
+  ldi r16, 0xff
+  st X+, r16                          ; dest address
+  ldi r16, 16                         ; msg code+src address+14 payload bytes
+  st X+, r16                          ; msg len
+  ldi r16, NETMSG_CMD_MEMSTATS
+  st X+, r16                          ; msg code
+  ldd r16, Y+NET_IFACE_OFFS_ADDRESS
+  st X+, r16                          ; src address
+
+  ; uid
+  rcall NETMSG_Common_AddUidToBuffer  ; (R16, R18, R19, R20, R21)
+  ; timestamp (0 for now)
+  clr r16
+  st X+, r16
+  st X+, r16
+  st X+, r16
+  st X+, r16
+  ; stack used
+  ldi r20, LOW(RAMEND)
+  ldi r21, HIGH(RAMEND)
+  in r17, SPL
+  sub r20, r17
+  st X+, r20
+  in r17, SPH
+  sbc r21, r17
+  st X+, r21
+  ; current buffers used
+  push xl
+    push xh
+      rcall NET_Buffer_CountUsed          ; (r16, r17, r18, X)
+    pop xh
+  pop xl
+  st X+, r16
+  ; max buffers used
+  clr r16
+  st X+, r16
+  ; no buffer errors
+  ldd r16, Y+NET_IFACE_OFFS_ERR_NOBUF_LOW
+  st X+, r16
+  ldd r16, Y+NET_IFACE_OFFS_ERR_NOBUF_HIGH
+  st X+, r16
+
+  sbiw xh:xl, 18 ; go back to beginning of message (1 byte dst addr, 1 byte length, 16 bytes payload)
+  rcall NETMSG_CalcAndAddChecksumByte ; (R16, R17, R18, R19, R20, X)
+  sbiw xh:xl, 19 ; go back to beginning of message (1 byte dst addr, 1 byte length, 16 bytes payload, 1 byte crc)
+  ret
+; @end
+
+
+