diff --git a/include/interfaces.h b/include/interfaces.h
index 88f3eee..d9f31b6 100755
--- a/include/interfaces.h
+++ b/include/interfaces.h
@@ -128,13 +128,11 @@ struct T_vaultRecord
         uint32_t AbsReserve;
         uint32_t AbsNrOfCuts;
 
-//16
         char label3buffer[4];	// mw >
 
         // Verkauf, Tuer zu:
         uint32_t VKcoinsInserted[16];		// nur fuer Wechsler, soviel wurde eingeworfen
         uint32_t VKcoinsReturned[6];		// nur fuer Wechsler, Anzahl Muenzen pro Typ, soviel wurde zurueckgegeben
-//88
 
         // Service, Tuer offen:
         uint16_t ServCoinsInserted[16];		// nur fuer Wechsler, soviel wurde eingeworfen
@@ -144,12 +142,10 @@ struct T_vaultRecord
         uint16_t currentTubeContent[6];		//  nur fuer Wechsler, aktueller Fuellstand
         uint16_t resint5;
         uint16_t resint6;
-// 56
 
         char label4buffer[4];	// box>
         uint16_t coinsInVault[16];
         uint16_t billsInStacker[8];
-// 48
 
         char label5buffer[4];	// val>
         // actually constant unless exchange rate is changed
@@ -159,11 +155,17 @@ struct T_vaultRecord
         uint16_t exchangeRate;
         uint16_t resint9;
 
-// 64
+        // new from 1.8.23
+        uint32_t cutsSinceCBchange;
+        uint32_t CBcontent_cent;
+        uint32_t CBnrofCoins;
 
-        char endofblock[4];	// end>
+        char endofblock[4];	// end
+// 332 bytes
 
-// 316 byte Block im Speicher
+        uint16_t CRC16;     // Xmodem16 from startbuffer[0] to endofblock[3]
+        uint16_t resint11;
+        char  endofRecord[4];	// ----
 
 };
 
@@ -317,7 +319,8 @@ struct T_devices
     UCHAR   kindOfPrinter;			// 0:off   1:Gebe
     UCHAR	kindOfCoinChecker;		// 0: without  1=EMP820   2=EMP900    3=currenza Csquare  (MW)
     UCHAR	kindOfMifareReader;		// by now only stronglink SL025 =1
-    UCHAR   suppressSleepMode;		// 0:sleep allowed   1: no sleep
+    UCHAR   solarPower;             // 1:sleep allowed   0: no sleep
+    //UCHAR   suppressSleepMode;	// 0:sleep allowed   1: no sleep
 
     UCHAR	kindOfModem;			// 0:off    1:Sunlink
     UCHAR	kindOfCreditcard;		// 0:off    1:Feig NFC
@@ -336,6 +339,8 @@ struct T_devices
 
     UINT	VaultFullWarnLevel;
     UINT	VaultFullErrorLevel;
+    UINT    BattEmptyWarnLevel;
+    UINT    BattEmptyErrorLevel;
 
 };
 
@@ -1151,14 +1156,13 @@ public:
         // to be forwarded to Ismas
 
     virtual bool prn_printAccountReceipt(void) const =0;
+        // print all 8 backuped accounting receipts
         // return true if sending to DC OK, false if cmd-stack is full
 
     virtual bool prn_printTestTicket(void) const =0;
         // return true if sending to DC OK, false if cmd-stack is full
 
 
-
-
     virtual bool cash_startPayment(uint32_t amount) const =0;
         // 17.4.23TS: extended to 32bit
 
@@ -1273,7 +1277,7 @@ public:
 
     virtual uint16_t log_getLatestAccountNumber(void) const=0;
     // new function 27.6.2023
-    // latest = highest
+    // latest = highest of the backup's
 
     virtual uint8_t log_getAvailableVaultBlocks(void) const=0;
         // return 0x0011 1111 if all 6 blocks are loaded (one bit per block)
@@ -1297,7 +1301,45 @@ public:
         // 2: done and error
 
     virtual bool log_getVaultData(uint8_t *data) const =0;
-        // get vault record in linear 8bit buffer with 320 byte
+        // get vault record in linear 8bit buffer with 384 byte
+
+
+
+    // new from 1.8.23
+    virtual bool prn_printOneAccountReceipt(uint16_t accountNr) const =0;
+        // print one out of eight stored last accounting receipts
+        // function log_getHoldAccountNumbers() gives a list of acc-Nr. of the stored receipts
+
+    virtual bool prn_printAllAvailAccountReceipts(void) const =0;
+        // same as: prn_printAccountReceipt() from line 1153
+        // return true if sending to DC OK, false if cmd-stack is full
+
+    virtual bool log_verifyVaultRecordByCrc(void) const =0;
+        // return true if CRC16 is correct, data are 100% OK. Security level 1:65536
+        // verification is strongly recommended before further processing
+        // in case of "false"-result please reload from DC
+
+
+    virtual uint16_t log_DC_getNextAccountNumber(void) const=0;
+        // the current cash box content will be backuped with this number on next cashbox-change
+
+    virtual void log_DC_setNextAccountNumber(uint16_t newAccountingNumber) const=0;
+        // the current cash box content will be backuped with this number on next cashbox-change
+        // use only in case of hardware replacements or errors which derailed the number
+
+    virtual void log_DC_deleteAllVaultrecordsInDc(void) const=0;
+        // use only in case of hardware replacements or errors which derailed the number
+
+    virtual void log_DC_deleteAllTotalCounters(void) const=0;
+        // use only in case of hardware replacements or errors which derailed the number
+
+    virtual void dc_setNewCustomerNumber(uint16_t newCustNr) const =0;
+
+    virtual void dc_setNewMachineNumber(uint16_t newMachNr) const =0;
+
+    virtual void dc_setNewBorough(uint16_t newBorough) const =0;
+
+    virtual void dc_setNewZone(uint16_t newZone) const =0;
 
 
 
@@ -1356,6 +1398,10 @@ signals:
 // 15.06.2023 V4.2  bring into same order as hwapi in order to set the THIS_IS_CA_MASTER correct
 // 19.06.2023 V4.3  added some qCriticals to see emits
 
+// 01.08.2023 V4.4  some new values at the end of struct T_vaultRecord
+//                  two more values in struct T_devices
+//                  7 new functions at the end of the file
+
 
 //#define HWINF_iid "Atb.Psa2020.software.HWapi/3.1"
 //#define HWINF_iid "Atb.Psa1256ptu5.software.HWapi/3.1"
@@ -1366,7 +1412,8 @@ signals:
 //#define HWINF_iid "Atb.Psa1256ptu5.software.HWapi/4.0"
 //#define HWINF_iid "Atb.Psa1256ptu5.software.HWapi/4.1"
 //#define HWINF_iid "Atb.Psa1256ptu5.software.HWapi/4.2"
-#define HWINF_iid "Atb.Psa1256ptu5.software.HWapi/4.3"
+//#define HWINF_iid "Atb.Psa1256ptu5.software.HWapi/4.3"
+#define HWINF_iid "Atb.Psa1256ptu5.software.HWapi/4.4"