diff --git a/avr/devices/all/includes.asm b/avr/devices/all/includes.asm
index d603918..3dc46d6 100644
--- a/avr/devices/all/includes.asm
+++ b/avr/devices/all/includes.asm
@@ -144,6 +144,9 @@
 
 #ifdef MODULES_CCS811
   .include "modules/ccs811/main.asm"
+  #ifdef MODULES_NETWORK
+    .include "modules/ccs811/send.asm"
+  #endif
 #endif
 
 #ifdef MODULES_TCRT1000
diff --git a/avr/devices/all/main.asm b/avr/devices/all/main.asm
index 6faf1a1..73c98fb 100644
--- a/avr/devices/all/main.asm
+++ b/avr/devices/all/main.asm
@@ -154,6 +154,10 @@ sysOnEveryMinute:
   bigcall AppStats_OnEveryMinute
 #endif
 
+#ifdef MODULES_CCS811
+  bigcall CCS811_OnEveryMinute
+#endif
+
   bigjmp onEveryMinute
 ; @end
 
diff --git a/avr/modules/ccs811/main.asm b/avr/modules/ccs811/main.asm
index afe5870..d2357d6 100644
--- a/avr/modules/ccs811/main.asm
+++ b/avr/modules/ccs811/main.asm
@@ -16,6 +16,8 @@
 .equ CCS811_FLAGS_RESETTED       = 0x40
 .equ CCS811_FLAGS_VALIDDATA      = 0x20
 
+.equ CCS811_VALUE_TVOC           = 0x01
+.equ CCS811_VALUE_CO2            = 0x02
 
 .equ CCS811_WAITMS_AFTER_RESET   = 50
 .equ CCS811_WAITMS_AFTER_START   = 50
@@ -38,7 +40,6 @@
 .equ CCS811_MEASUREMODE = (0<<CCS811_MEASUREMODE_DM2_BIT) | (1<<CCS811_MEASUREMODE_DM1_BIT) | (1<<CCS811_MEASUREMODE_DM0_BIT)
 ;.equ CCS811_MEASUREMODE = (0<<CCS811_MEASUREMODE_DM2_BIT) | (1<<CCS811_MEASUREMODE_DM1_BIT) | (0<<CCS811_MEASUREMODE_DM0_BIT)
 
-.equ CCS811_INTERVAL             = 60
 
 
 ; ***************************************************************************
@@ -48,7 +49,6 @@
 
 ccs811DataBegin:
   ccs811Flags:            .byte 1
-  ccs811Timer:            .byte 1
   ccs811ResponseData:     .byte 5
 ccs811DataEnd:
 
@@ -80,9 +80,6 @@ CCS811_Init:
   ldi r17, (ccs811DataEnd-ccs811DataBegin)
   rcall Utils_FillSram
 
-  ldi r16, CCS811_INTERVAL
-  sts ccs811Timer, r16
-  
   ; check for fw mode, valid app
   rcall ccs811ReadStatus
   brcc CCS811_Init_error
@@ -160,66 +157,28 @@ CCS811_Fini:
 ; - CFLAG: set if okay, clear on error
 ; USED:
 
-CCS811_OnTimer:
+CCS811_OnEveryMinute:
   in r15, SREG
   push r15
     cli
-
     lds r16, ccs811Flags
     andi r16, CCS811_FLAGS_ACTIVATED
     breq CCS811_OnTimer_ret
 
-    lds r16, ccs811Timer
-    dec r16
-    cpi r16, 2
-    breq CCS811_OnTimer_measure
-    cpi r16, 1
-    breq CCS811_OnTimer_sendCO2
-    tst r16
-    breq CCS811_OnTimer_sendTVOC
-    sts ccs811Timer, r16
-    rjmp CCS811_OnTimer_ret
-CCS811_OnTimer_measure:
     lds r16, ccs811Flags
     andi r16, ~CCS811_FLAGS_VALIDDATA
     sts ccs811Flags, r16
     rcall ccs811ReadMeasurement
-;    brcc CCS811_OnTimer_ret
-    brcc CCS811_OnTimer_storetimerret
-;    rcall ccs811SendDebug                 ; debug
+    brcc CCS811_OnTimer_ret
     lds r16, ccs811ResponseData+4
     andi r16, (1<<CCS811_STATUS_DATAREADY_BIT)
-;    breq CCS811_OnTimer_ret
-    breq CCS811_OnTimer_storetimerret      ; jmp if data not ready
+    breq CCS811_OnTimer_ret      ; jmp if data not ready
     lds r16, ccs811Flags
     ori r16, CCS811_FLAGS_VALIDDATA
     sts ccs811Flags, r16
-    rjmp CCS811_OnTimer_storetimerret
-CCS811_OnTimer_sendCO2:
-    lds r16, ccs811Flags
-    andi r16, CCS811_FLAGS_VALIDDATA
-;    breq CCS811_OnTimer_ret
-    breq CCS811_OnTimer_storetimerret
-    rcall ccs811SendCo2
-    rjmp CCS811_OnTimer_storetimerret
-CCS811_OnTimer_sendTVOC:
-    lds r16, ccs811Flags
-    andi r16, CCS811_FLAGS_VALIDDATA
-;    breq CCS811_OnTimer_ret
-    breq CCS811_OnTimer_storetimerret
-    rcall ccs811SendTvoc
-;    rjmp CCS811_OnTimer_storetimerret
-CCS811_OnTimer_storetimerret:
-    lds r16, ccs811Timer
-    dec r16
-    brne CCS811_OnTimer_storetimer
-    ldi r16, CCS811_INTERVAL
-CCS811_OnTimer_storetimer:
-    sts ccs811Timer, r16
 CCS811_OnTimer_ret:
   pop r15
   out SREG, r15
-  clc
   ret
 
 
@@ -405,54 +364,43 @@ ccs811ReadData_error:
 ; @end
 
 
-ccs811SendDebug:
-  ldi r16, 0xff                    ; destination address
-  ldi r17, VALUE_ID_DEBUG          ; value id
-  ldi r22, 0
-  lds r18, ccs811ResponseData      ; value
-  lds r19, ccs811ResponseData+1
-  lds r20, ccs811ResponseData+2
-  lds r21, ccs811ResponseData+3
-  ldi xl, LOW(com2SendBuffer)
-  ldi xh, HIGH(com2SendBuffer)
-  rcall CPRO_WriteReportValue
-  rjmp COM2_SendPacket
 
+; ---------------------------------------------------------------------------
+; @routine CCS811_GetValue @global
+;
+; @param   R16     value to get (CCS811_VALUE_TVOC, CCS811_VALUE_CO2)
+; @return  CFLAG   set if value available, cleared otherwise
+; @return  R19:R18 value
+; @return  R21:R20 denom (e.g. 100, meaning value must be divided by 100)
+; @clobbers 
 
-
-ccs811SendCo2:
-  ldi r17, VALUE_ID_CO2              ; value id
-  ldi r22, AQHOME_VALUETYPE_CO2
-  lds r18, ccs811ResponseData+1      ; value
-  lds r19, ccs811ResponseData
-  rjmp ccs811SendAny
-
-
-
-ccs811SendTvoc:
-  ldi r17, VALUE_ID_TVOC             ; value id
-  ldi r22, AQHOME_VALUETYPE_TVOC
-  lds r18, ccs811ResponseData+3      ; value
-  lds r19, ccs811ResponseData+2
-  rjmp ccs811SendAny
-
-
-
-ccs811SendAny:
-  mov r16, r18                       ; check for FF FF
-  and r16, r19
-  inc r16
-  brne ccs811SendAny_send            ; send only if data is not FFFF
+CCS811_GetValue:
+  lds r17, ccs811Flags
+  andi r17, CCS811_FLAGS_VALIDDATA
+  breq CCS811_GetValue_noData
+  cpi r16, CCS811_VALUE_TVOC
+  breq CCS811_GetValue_retTvoc
+  cpi r16, CCS811_VALUE_CO2
+  breq CCS811_GetValue_retCo2
+CCS811_GetValue_noData:
   clc
   ret
-ccs811SendAny_send:
-  ldi r16, 0xff                      ; destination address
+CCS811_GetValue_retTvoc:
+  lds r18, ccs811ResponseData+3      ; value
+  lds r19, ccs811ResponseData+2
   ldi r20, 1
   clr r21
-  ldi xl, LOW(com2SendBuffer)
-  ldi xh, HIGH(com2SendBuffer)
-  rcall CPRO_WriteReportValue
-  rjmp COM2_SendPacket
+  rjmp CCS811_GetValue_secRet
+CCS811_GetValue_retCo2:
+  lds r18, ccs811ResponseData+1      ; value
+  lds r19, ccs811ResponseData
+  ldi r20, 1
+  clr r21
+CCS811_GetValue_secRet:
+  sec
+  ret
+; @end
+
 
 
 
diff --git a/avr/modules/ccs811/send.asm b/avr/modules/ccs811/send.asm
new file mode 100644
index 0000000..b231bdc
--- /dev/null
+++ b/avr/modules/ccs811/send.asm
@@ -0,0 +1,44 @@
+; ***************************************************************************
+; 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.   *
+; ***************************************************************************
+
+
+.cseg
+
+
+; ---------------------------------------------------------------------------
+; @routine CCS811_SendTVOC
+
+CCS811_SendTVOC:
+  ldi r16, CCS811_VALUE_TVOC
+  rcall CCS811_GetValue
+  brcc CCS811_SendTVOC_end
+  ldi r17, VALUE_ID_TVOC   ; VALUE ID
+  ldi r22, AQHOME_VALUETYPE_TVOC ; VALUE TYPE
+  rcall Main_SendValueReport
+CCS811_SendTVOC_end:
+  ret
+; @end
+
+
+
+; ---------------------------------------------------------------------------
+; @routine CCS811_SendCO2
+
+CCS811_SendCO2:
+  ldi r16, CCS811_VALUE_CO2
+  rcall CCS811_GetValue
+  brcc CCS811_SendCO2_end
+  ldi r17, VALUE_ID_CO2          ; VALUE ID
+  ldi r22, AQHOME_VALUETYPE_CO2  ; VALUE TYPE
+  rcall Main_SendValueReport
+CCS811_SendCO2_end:
+  ret
+; @end
+
+