diff --git a/B15F.elf b/B15F.elf
index 01e941a..ef11c2d 100644
Binary files a/B15F.elf and b/B15F.elf differ
diff --git a/B15F.hex b/B15F.hex
index 8e5321f..a51f56c 100644
--- a/B15F.hex
+++ b/B15F.hex
@@ -8,14 +8,14 @@
 :100070000C9489000C9489000C9489000C948900DC
 :100080000C9489000C9489000C948900F800FB0002
 :10009000FE00EF000101040107010A010D0110013A
-:1000A000F5001301AA05A705A4056105A1059E0594
-:1000B0009B059805950592058F05AD05B0051124A2
+:1000A000F5001301D505D205CF058C05CC05C90592
+:1000B000C605C305C005BD05BA05D805DB05112475
 :1000C0001FBECFEFD0E4DEBFCDBF11E0A0E0B1E0B6
-:1000D000E4ECFBE000E00BBF02C007900D92A232FF
+:1000D000EAE1FCE000E00BBF02C007900D92A23203
 :1000E000B107D9F721E0A2E2B1E001C01D92A4332B
 :1000F000B207E1F710E0CFE5D0E004C02197FE01A0
-:100100000E94D705CE35D107C9F70E944A050C9445
-:10011000E0050C94000083E391E00E94170160E089
+:100100000E940206CE35D107C9F70E9475050C94EE
+:100110000B060C94000083E391E00E94170160E05D
 :1001200080E391E00E945A016FEF80E391E00E942A
 :100130007B0160E08DE291E00E945A016FEF8DE259
 :1001400091E00E947B016FEF8AE291E00E947B01C7
@@ -24,15 +24,15 @@
 :10017000A895809160008861809360001092600073
 :100180000FBE0895CF930FB6F894A89580916000A4
 :10019000886180936000109260000FBE6FEF8DE267
-:1001A00091E00E949C0182E291E00E940E04C82F1F
+:1001A00091E00E949C0182E291E00E94F303C82F3B
 :1001B00060E08DE291E00E949C0199E288E10FB637
 :1001C000F894A895809360000FBE90936000A89566
 :1001D0008C2F90E0FC013197EC30F10510F0CF91BD
-:1001E0000895EA5BFF4F0C94D705CF910C94C60499
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-:100210000C948E04CF910C949704CF910C94A0046D
-:10022000CF910C94B304CF910C94D404089584B16D
+:1001E0000895EA5BFF4F0C940206CF910C94010531
+:1001F000CF910C947A04CF910C948B04CF910C94F2
+:10020000AA04CF910C94B704CF910C94C504CF915C
+:100210000C94D304CF910C94DC04CF910C94E5049E
+:10022000CF910C94F304CF910C940F05089584B1F1
 :10023000806B84B926988AB18C618AB980E58CBDBF
 :1002400081E08DBD8BB1837E8BB95A9A5B9A5C9AA3
 :1002500008958BB1837E8BB98BB160FD10C090E0A7
@@ -104,90 +104,95 @@
 :100670000E940102682F8DE291E00E949C01D9CF77
 :100680000E9472020E949B020E94C4020E94E90220
 :100690000E940E0382E08093C00088E18093C10035
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+:100BC00063E371E080E391E00E94550143E063E359
+:100BD00071E08DE291E00E94550145E063E371E030
+:100BE0008AE291E00E94550140E063E371E087E210
+:100BF00091E00E94240241E063E371E084E291E02D
+:100C00000C942402EE0FFF1F0024001C0BBE079063
+:0A0C1000F691E02D0994F894FFCF4F
+:100C1A00626F617264696E666F2E680031333A33AF
+:100C2A00323A3430004D6172203239203230313953
+:020C3A000000B8
 :00000001FF
diff --git a/global_vars.cpp b/global_vars.cpp
index 9b88db9..35b855c 100644
--- a/global_vars.cpp
+++ b/global_vars.cpp
@@ -9,4 +9,3 @@ TLC5615 dac1(spi, SPIADR::AA1);
 ADU adu;
 USART usart;
 
-bool ACK_MODE = 1;
diff --git a/global_vars.h b/global_vars.h
index d6206c2..c7ecd0c 100644
--- a/global_vars.h
+++ b/global_vars.h
@@ -15,6 +15,4 @@ extern TLC5615 dac1;
 extern ADU adu;
 extern USART usart;
 
-extern bool ACK_MODE;
-
 #endif // GLOBAL_VARS_H
diff --git a/requests.cpp b/requests.cpp
index 3a83465..3ab761b 100644
--- a/requests.cpp
+++ b/requests.cpp
@@ -14,9 +14,7 @@ void rqBoardInfo()
 	usart.writeStr(DATE, sizeof(DATE));
 	usart.writeStr(TIME, sizeof(TIME));
 	usart.writeStr(FSRC, sizeof(FSRC));
-	
-	if(ACK_MODE)
-		usart.writeByte(USART::MSG_OK);
+	usart.writeByte(USART::MSG_OK);
 }
 
 void rqTestIntConv()
@@ -29,8 +27,7 @@ void rqDigitalWrite0()
 	uint8_t port = usart.readByte();
 	beba0.writePortA(port);
 
-	if(ACK_MODE)
-		usart.writeByte(USART::MSG_OK);
+	usart.writeByte(USART::MSG_OK);
 }
 
 void rqDigitalWrite1()
@@ -38,8 +35,7 @@ void rqDigitalWrite1()
 	uint8_t port = usart.readByte();
 	beba1.writePortA(port);
 
-	if(ACK_MODE)
-		usart.writeByte(USART::MSG_OK);
+	usart.writeByte(USART::MSG_OK);
 }
 
 void rqDigitalRead0()
@@ -59,8 +55,7 @@ void rqAnalogWrite0()
 	uint16_t value = usart.readInt();
 	dac0.setValue(value);
 
-	if(ACK_MODE)
-		usart.writeByte(USART::MSG_OK);
+	usart.writeByte(USART::MSG_OK);
 }
 
 void rqAnalogWrite1()
@@ -68,8 +63,7 @@ void rqAnalogWrite1()
 	uint16_t value = usart.readInt();
 	dac1.setValue(value);
 
-	if(ACK_MODE)
-		usart.writeByte(USART::MSG_OK);
+	usart.writeByte(USART::MSG_OK);
 }
 
 void rqAnalogRead()
@@ -97,7 +91,12 @@ void rqAdcDacStroke()
 		dac0.setValue(i);
 		wdt_reset();
 
-		union doubleword
+		uint16_t val_a = adu.getValue(channel_a);
+		uint16_t val_b = adu.getValue(channel_b);
+		usart.writeInt(val_a);
+		usart.writeInt(val_b);
+
+		/*union doubleword
 		{
 			uint16_t word[2];
 			uint8_t  byte[4];
@@ -115,7 +114,7 @@ void rqAdcDacStroke()
 
 			if(ret == 0)
 				return;
-		} while(ret != USART::MSG_OK);
+		} while(ret != USART::MSG_OK);*/
 	}
 	
 	usart.writeByte(USART::MSG_OK);
diff --git a/usart.cpp b/usart.cpp
index 324e080..57d8f15 100644
--- a/usart.cpp
+++ b/usart.cpp
@@ -15,12 +15,22 @@ void USART::init()
 
 }
 
+void USART::flush()
+{
+	uint8_t dummy;
+	while (UCSR0A & (1<<RXC0))
+		dummy = UDR0;
+
+	if(dummy) // taeusche dummy Verwendung vor
+		return;
+}
+
 void USART::writeByte(uint8_t b)
 {
 	while (!(UCSR0A & (1<<UDRE0)));
 	UDR0 = b;
 
-	while(!(UCSR0A & _BV(TXC0)));
+	//while(!(UCSR0A & _BV(TXC0)));
 }
 
 
@@ -35,8 +45,7 @@ void USART::writeInt(uint16_t v)
 	while (!(UCSR0A & (1<<UDRE0)));
 	UDR0 = v & 0xFF;
 
-	while(!(UCSR0A & _BV(TXC0)));
-	_delay_ms(1);
+	//while(!(UCSR0A & _BV(TXC0)));
 }
 
 void USART::writeStr(const char* str, uint8_t len)
@@ -80,3 +89,34 @@ uint16_t USART::readInt()
 	v |= readByte() << 8;
 	return v;
 }
+
+void USART::readBlock(uint8_t* ptr, uint8_t offset)
+{
+	ptr += offset;
+	uint8_t crc = 0;
+
+	uint8_t len = readByte();
+	for(uint8_t k = 0; k <= len; k++) // len + 1 Durchgänge (+ crc)
+	{
+		uint8_t next = readByte();
+
+		crc ^= next;
+		for (uint8_t i = 0; i < 8; i++)
+		{
+			if (crc & 1)
+				crc ^= CRC7_POLY;
+			crc >>= 1;
+		}
+
+		if(k < len)
+			ptr[k] = next;
+	}
+
+	if(crc == 0)
+	{
+		writeByte(MSG_OK);
+		return;
+	}
+	
+	writeByte(MSG_FAIL);
+}
diff --git a/usart.h b/usart.h
index 81a43c1..ade6b77 100644
--- a/usart.h
+++ b/usart.h
@@ -5,13 +5,14 @@
 #include <util/delay.h>
 #include <stdint.h>
 
-constexpr uint32_t BAUDRATE = 38400; // 38400
+constexpr uint32_t BAUDRATE = 115200; // 38400
 constexpr uint8_t  CRC7_POLY = 0x91;
 
 class USART
 {
 public:
 	void init(void);
+	void flush(void);
 
 	void writeByte(uint8_t);
 	void writeInt(uint16_t);
@@ -21,6 +22,7 @@ public:
 	uint8_t readByte(void);
 	uint16_t readInt(void);
 	uint32_t readLong(void);
+	void readBlock(uint8_t*, uint8_t);
 
 	constexpr static uint8_t MSG_OK = 0xFF;
 	constexpr static uint8_t MSG_FAIL = 0xFE;