diff --git a/examples/PrintArdui/PrintArdui.ino b/examples/PrintArdui/PrintArdui.ino
new file mode 100644
index 0000000..76641d8
--- /dev/null
+++ b/examples/PrintArdui/PrintArdui.ino
@@ -0,0 +1,35 @@
+// TestSerial
+void setup() {
+ Serial.begin(9600);
+}
+int16_t v16s; uint16_t v16; uint8_t v8;
+void loop() { 
+  Serial.println("Test TerSer");
+  v8= 19; Serial.println(v8,BIN); 
+  v16= 1000; Serial.println(v16,HEX);
+  v16s= 0; Serial.println(v16s);
+  v16s= 5; Serial.println(v16s);
+  v16s= 23124; Serial.println(v16s);
+  v16s= -200; Serial.println(v16s);
+  v16= 200; Serial.println(v16);
+
+ for(;;);
+}
+
+/*
+PrintArdui vide 1426b  184v  1966b 205v 
+0
+5
+23124
+-200
+200
+
+ */
+
+/*
+ Test Serial.h 1970b 204v   Empty 1426b 184v  +544b +20v
+7F127127
+81129-127
+FF255-1
+
+ */
diff --git a/examples/TerSerMainTest/TerSer.h b/examples/TerSerMainTest/TerSer.h
new file mode 100644
index 0000000..558b76c
--- /dev/null
+++ b/examples/TerSerMainTest/TerSer.h
@@ -0,0 +1,275 @@
+// TerSer.h  4 modes  190323 
+// ~280 lines ~7700 car
+//add to main program  #include "TerSer.h"  SetupTerSer();
+// or  from Arduino lib #include <TerSer.h>  SetupTerSer();
+void SetupTerSer() { 
+  UBRR0= 103;  // 9600
+  UCSR0B=0x18; // -- -- -- rxe txe -- -- --
+  UCSR0C=0x06; // set mode: 8 data bits, no parity, 1 stop bit
+}
+
+uint8_t moz=0;  // Default value
+#define Normal moz=0
+#define Spaces moz=1
+#define Zeros  moz=2
+#define Compact moz=3
+
+uint8_t Get() {  // read blocking
+  while (!(UCSR0A&0x80)); // wait
+  return UDR0; 
+}
+
+void Car( uint8_t dd) {  // write blocking
+  while(!(UCSR0A&0x20));// wait 
+  UDR0=dd;  // OK, send it now!
+}
+
+void CR() {
+  Car(13);Car(10);  // CR LF
+}
+
+void Text(const char str[]) {
+  for (uint8_t i=0; i< strlen(str); i++) { Car(str[i]); }
+}
+
+void Textln(const char str[]) {
+   for (uint8_t i=0; i< strlen(str); i++) { Car(str[i]); }
+   Car(13);Car(10);
+}
+
+void TtBin8 (uint8_t bb) {  // auxiliary function
+  for (uint8_t i=0;i<8;i++) {
+     if (bb&0x80) Car('1');
+     else Car('0');
+     bb <<= 1;
+  }
+}
+void Bin8 (uint8_t bb) {
+  TtBin8 (bb); Car(' ');
+}
+void Bin16 (uint16_t bb) {
+ TtBin8 (bb>>8); Car('.');
+ TtBin8 (bb&0xFF);
+ Car(' ');
+}
+
+char ConvNibble (uint8_t nn) { //  4 bit binary to Ascii
+  uint8_t cc;
+  if (nn<10) {cc = nn + '0';}
+  else {cc = nn-10 + 'A';}
+  return cc;
+}
+
+void Hex8 (uint8_t hh) {
+  uint8_t cc;
+  cc = ConvNibble (hh >> 4);  Car(cc);
+  cc = ConvNibble (hh & 0x0F) ; Car(cc);
+  Car(' '); // space
+}
+void Hex16 (uint16_t hh) {
+  uint8_t cc;
+  cc = ConvNibble (hh >> 12) ;  Car(cc);
+  cc = ConvNibble ((hh >> 8)&0x0F) ; Car(cc);
+  cc=hh&0xFF; Hex8 (cc);
+  Car(' ');
+}
+void Hex32 (uint32_t hh) {
+  uint8_t cc;
+  cc = ConvNibble (hh >> 28) ;  Car(cc);
+  cc = ConvNibble ((hh >> 24)&0x0F) ; Car(cc);
+  cc = ConvNibble ((hh >> 20)&0x0F) ; Car(cc);
+  cc = ConvNibble ((hh >> 16)&0x0F) ; Car(cc);
+  cc=hh&0xFFFF; Hex16 (cc);
+  Car(' ');
+}
+
+// -- new Decimal functions with 4 modes (see above)
+   
+uint8_t uni,diz,cen,mil,dim;
+uint8_t tyn;  // type number
+uint8_t sig;
+ 
+void BinDec8 (uint8_t bb) {
+  uni=0;diz=0;cen=0;
+  tyn=0; if (bb==0) return;
+  uni=bb%10; bb=bb/10; if (bb==0){tyn=1;return;}
+  diz=bb%10; bb=bb/10; if (bb==0){tyn=2;return;}
+  cen=bb; tyn=3;
+}
+ 
+void Af3Dig() {
+ switch (moz) {
+  case 0: // Normal  signe devant le nombre
+  switch (tyn) {
+    case 0:
+     Car(' '); Car(' ');Car(' ');Car('0');  Car(' ');  break;
+    case 1:
+     Car(' ');Car(' '); Car(sig); Car(uni+'0'); Car(' ');  break;
+    case 2:
+     Car(' '); Car(sig); Car(diz+'0'); Car(uni+'0'); Car(' ');   break;
+    case 3:
+     Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+   } // end switch tyn
+   break; // end case moz 0
+    case 1: // Spaces
+    switch (tyn) { 
+     case 0:
+      Car(' '); Car(' ');Car(' ');Car('0');  Car(' '); break;
+     case 1:
+      Car(sig);Car(' '); Car(' '); Car(uni+'0'); Car(' '); break;
+     case 2:
+      Car(sig); Car(' '); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+     case 3:
+      Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    } // end switch tyn
+  break;  // end case moz 1
+    case 2: // Zeros
+    switch (tyn) {
+     case 0:
+      Car(' '); Car('0');Car('0');Car('0'); Car(' '); break;
+     case 1:
+      Car(sig);Car('0'); Car('0'); Car(uni+'0'); Car(' '); break;
+     case 2:
+      Car(sig); Car('0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+     case 3:
+      Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+   } // end switch tyn
+   break; // end case moz 2
+    case 3: // Compact
+    switch (tyn) {
+     case 0:
+      Car('0');  Car(' ');  break;
+     case 1:
+      Car(sig); Car(uni+'0'); Car(' ');  break;
+     case 2:
+      Car(sig); Car(diz+'0'); Car(uni+'0'); Car(' ');   break;
+     case 3:
+      Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    } // end switch tyn
+    break; // endcase moz 3
+ }  // end switch moz
+}
+// this macro generate a warning depending on sign
+#define Dec8(v)                 \
+    do { typeof(v) _v = -1;     \
+      if (_v < 0) { Dec8s(v); } \
+       else { Dec8u(v); }       \
+    } while(0);
+
+void Dec8u (uint8_t hh) {
+   sig=' ';
+   BinDec8 (hh); Af3Dig();
+}
+
+void Dec8s (int8_t hh) {
+  if (hh<0) {  // négatif
+    sig='-'; hh = -hh;
+  } else {
+    sig='+';
+  }
+  BinDec8 (hh); Af3Dig();
+}
+
+//-----------------
+void BinDec16 (uint32_t bb) { 
+  uni=0;diz=0;cen=0;mil=0;dim=0;
+  tyn=0; if (bb==0) return;
+  uni=bb%10; bb=bb/10; if (bb==0){tyn=1;return;}
+  diz=bb%10; bb=bb/10; if (bb==0){tyn=2;return;}
+  cen=bb%10; bb=bb/10; if (bb==0){tyn=3;return;}
+  mil=bb%10; bb=bb/10; if (bb==0){tyn=4;return;}
+  dim=bb; tyn=5;
+}
+
+void Af5Dig() {
+ switch (moz) {
+  case 0: // Normal mode
+  switch (tyn) {
+    case 0:
+     Car(' '); Car(' '); Car(' ');Car(' ');Car(' ');Car('0');  Car(' ');  break;
+    case 1:
+     Car(' '); Car(' '); Car(' ');Car(' ');Car(sig);Car(uni+'0'); Car(' ');  break;
+    case 2:
+     Car(' '); Car(' '); Car(' ');Car(sig);Car(diz+'0');Car(uni+'0'); Car(' ');   break;
+    case 3:
+     Car(' '); Car(' '); Car(sig);Car(cen+'0');Car(diz+'0');Car(uni+'0'); Car(' ');   break;
+    case 4:
+     Car(' '); Car(sig); Car(mil+'0');Car(cen+'0');Car(diz+'0');Car(uni+'0'); Car(' ');   break;    
+    case 5:
+     Car(sig); Car(dim+'0'); Car(mil+'0');Car(cen+'0');Car(diz+'0');Car(uni+'0'); Car(' ');  break;
+  } // end switch tyn
+  break;
+  case 1: // Spaces
+   switch (tyn) { 
+    case 0: 
+     Car(' '); Car(' ');Car(' ');Car(' ');Car(' ');Car('0');  Car(' '); break;
+    case 1:
+     Car(sig);Car(' '); Car(' ');Car(' ');Car(' '); Car(uni+'0'); Car(' '); break;
+    case 2:
+     Car(sig); Car(' '); Car(' ');Car(' ');Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    case 3:
+     Car(sig); Car(' '); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    case 4:
+     Car(sig); Car(' ');Car(mil+'0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    case 5:
+     Car(sig); Car(dim+'0');Car(mil+'0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+   } // end switch tyn
+  break;  // case 1
+    case 2: // Zeros
+    switch (tyn) {
+    case 0:
+     Car(' '); Car('0');Car('0');Car('0');Car('0');Car('0'); Car(' '); break;
+    case 1:
+     Car(sig); Car('0');Car('0');Car('0'); Car('0'); Car(uni+'0'); Car(' '); break;
+    case 2:
+     Car(sig); Car('0');Car('0');Car('0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    case 3:
+     Car(sig); Car('0');Car('0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    case 4:
+     Car(sig); Car('0');Car(mil+'0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    case 5:
+     Car(sig); Car(dim+'0');Car(mil+'0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+   } // end switch tyn
+   break;
+    case 3: // Compact
+     switch (tyn) {
+      case 0:
+       Car('0');  Car(' ');  break;
+      case 1:
+       Car(sig); Car(uni+'0'); Car(' ');  break;
+      case 2:
+       Car(sig); Car(diz+'0'); Car(uni+'0'); Car(' ');   break;
+      case 3:
+       Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+      case 4:
+       Car(sig); Car(mil+'0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+      case 5:
+       Car(sig); Car(dim+'0');Car(mil+'0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;    
+     } // end switch tyn
+     break;
+   }  // end switch moz
+}
+
+// this macro generate a warning depending on sign
+#define Dec16(v)                 \
+    do { typeof(v) _v = -1;      \
+      if (_v < 0) { Dec16s(v); } \
+       else { Dec16u(v); }       \
+    } while(0);
+
+void Dec16u (uint16_t hh) {
+   sig=' ';
+   BinDec16(hh); Af5Dig();
+}
+
+void Dec16s (int16_t hh) {
+  if (hh<0) {  // négatif
+    sig='-'; hh = -hh;
+  } else {
+    sig='+';
+  }
+  BinDec16(hh); Af5Dig();
+}
+// end code
+
+
diff --git a/examples/TerSerMainTest/TestTerSerMain.ino b/examples/TerSerMainTest/TestTerSerMain.ino
new file mode 100644
index 0000000..7a5e6fd
--- /dev/null
+++ b/examples/TerSerMainTest/TestTerSerMain.ino
@@ -0,0 +1,35 @@
+//TestTerSer.ino  Terminal série et aff nombres  
+#include "TerSer.h"   
+
+int16_t v16s; uint16_t v16; uint8_t v8;
+int main() {
+  SetupTerSer();
+ while(1) {  // empty 174 bytes 0var
+  Textln("Test TerSer");
+  v8= 19; Bin8(v8); CR();
+  v16= 1000; Hex16(v16); CR();
+  v16s= 0; Dec16(v16s);CR();
+  v16s= 5; Dec16(v16s);CR();
+  v16s= 23124; Dec16(v16s);CR();
+  v16s= -200; Dec16(v16s);CR();
+  v16= 200; Dec16(v16);CR();
+ 
+for(;;);
+
+ } // end while(1)
+} // end main()
+
+/*
+Size is 960 bites 24 var
+
+Test TerSer
+00010011 
+03E8  
+     0 
+    +5 
++23124 
+  -200 
+   200 
+
+
+ */
diff --git a/examples/TerSerTest/TerSer.h b/examples/TerSerTest/TerSer.h
new file mode 100644
index 0000000..558b76c
--- /dev/null
+++ b/examples/TerSerTest/TerSer.h
@@ -0,0 +1,275 @@
+// TerSer.h  4 modes  190323 
+// ~280 lines ~7700 car
+//add to main program  #include "TerSer.h"  SetupTerSer();
+// or  from Arduino lib #include <TerSer.h>  SetupTerSer();
+void SetupTerSer() { 
+  UBRR0= 103;  // 9600
+  UCSR0B=0x18; // -- -- -- rxe txe -- -- --
+  UCSR0C=0x06; // set mode: 8 data bits, no parity, 1 stop bit
+}
+
+uint8_t moz=0;  // Default value
+#define Normal moz=0
+#define Spaces moz=1
+#define Zeros  moz=2
+#define Compact moz=3
+
+uint8_t Get() {  // read blocking
+  while (!(UCSR0A&0x80)); // wait
+  return UDR0; 
+}
+
+void Car( uint8_t dd) {  // write blocking
+  while(!(UCSR0A&0x20));// wait 
+  UDR0=dd;  // OK, send it now!
+}
+
+void CR() {
+  Car(13);Car(10);  // CR LF
+}
+
+void Text(const char str[]) {
+  for (uint8_t i=0; i< strlen(str); i++) { Car(str[i]); }
+}
+
+void Textln(const char str[]) {
+   for (uint8_t i=0; i< strlen(str); i++) { Car(str[i]); }
+   Car(13);Car(10);
+}
+
+void TtBin8 (uint8_t bb) {  // auxiliary function
+  for (uint8_t i=0;i<8;i++) {
+     if (bb&0x80) Car('1');
+     else Car('0');
+     bb <<= 1;
+  }
+}
+void Bin8 (uint8_t bb) {
+  TtBin8 (bb); Car(' ');
+}
+void Bin16 (uint16_t bb) {
+ TtBin8 (bb>>8); Car('.');
+ TtBin8 (bb&0xFF);
+ Car(' ');
+}
+
+char ConvNibble (uint8_t nn) { //  4 bit binary to Ascii
+  uint8_t cc;
+  if (nn<10) {cc = nn + '0';}
+  else {cc = nn-10 + 'A';}
+  return cc;
+}
+
+void Hex8 (uint8_t hh) {
+  uint8_t cc;
+  cc = ConvNibble (hh >> 4);  Car(cc);
+  cc = ConvNibble (hh & 0x0F) ; Car(cc);
+  Car(' '); // space
+}
+void Hex16 (uint16_t hh) {
+  uint8_t cc;
+  cc = ConvNibble (hh >> 12) ;  Car(cc);
+  cc = ConvNibble ((hh >> 8)&0x0F) ; Car(cc);
+  cc=hh&0xFF; Hex8 (cc);
+  Car(' ');
+}
+void Hex32 (uint32_t hh) {
+  uint8_t cc;
+  cc = ConvNibble (hh >> 28) ;  Car(cc);
+  cc = ConvNibble ((hh >> 24)&0x0F) ; Car(cc);
+  cc = ConvNibble ((hh >> 20)&0x0F) ; Car(cc);
+  cc = ConvNibble ((hh >> 16)&0x0F) ; Car(cc);
+  cc=hh&0xFFFF; Hex16 (cc);
+  Car(' ');
+}
+
+// -- new Decimal functions with 4 modes (see above)
+   
+uint8_t uni,diz,cen,mil,dim;
+uint8_t tyn;  // type number
+uint8_t sig;
+ 
+void BinDec8 (uint8_t bb) {
+  uni=0;diz=0;cen=0;
+  tyn=0; if (bb==0) return;
+  uni=bb%10; bb=bb/10; if (bb==0){tyn=1;return;}
+  diz=bb%10; bb=bb/10; if (bb==0){tyn=2;return;}
+  cen=bb; tyn=3;
+}
+ 
+void Af3Dig() {
+ switch (moz) {
+  case 0: // Normal  signe devant le nombre
+  switch (tyn) {
+    case 0:
+     Car(' '); Car(' ');Car(' ');Car('0');  Car(' ');  break;
+    case 1:
+     Car(' ');Car(' '); Car(sig); Car(uni+'0'); Car(' ');  break;
+    case 2:
+     Car(' '); Car(sig); Car(diz+'0'); Car(uni+'0'); Car(' ');   break;
+    case 3:
+     Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+   } // end switch tyn
+   break; // end case moz 0
+    case 1: // Spaces
+    switch (tyn) { 
+     case 0:
+      Car(' '); Car(' ');Car(' ');Car('0');  Car(' '); break;
+     case 1:
+      Car(sig);Car(' '); Car(' '); Car(uni+'0'); Car(' '); break;
+     case 2:
+      Car(sig); Car(' '); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+     case 3:
+      Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    } // end switch tyn
+  break;  // end case moz 1
+    case 2: // Zeros
+    switch (tyn) {
+     case 0:
+      Car(' '); Car('0');Car('0');Car('0'); Car(' '); break;
+     case 1:
+      Car(sig);Car('0'); Car('0'); Car(uni+'0'); Car(' '); break;
+     case 2:
+      Car(sig); Car('0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+     case 3:
+      Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+   } // end switch tyn
+   break; // end case moz 2
+    case 3: // Compact
+    switch (tyn) {
+     case 0:
+      Car('0');  Car(' ');  break;
+     case 1:
+      Car(sig); Car(uni+'0'); Car(' ');  break;
+     case 2:
+      Car(sig); Car(diz+'0'); Car(uni+'0'); Car(' ');   break;
+     case 3:
+      Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    } // end switch tyn
+    break; // endcase moz 3
+ }  // end switch moz
+}
+// this macro generate a warning depending on sign
+#define Dec8(v)                 \
+    do { typeof(v) _v = -1;     \
+      if (_v < 0) { Dec8s(v); } \
+       else { Dec8u(v); }       \
+    } while(0);
+
+void Dec8u (uint8_t hh) {
+   sig=' ';
+   BinDec8 (hh); Af3Dig();
+}
+
+void Dec8s (int8_t hh) {
+  if (hh<0) {  // négatif
+    sig='-'; hh = -hh;
+  } else {
+    sig='+';
+  }
+  BinDec8 (hh); Af3Dig();
+}
+
+//-----------------
+void BinDec16 (uint32_t bb) { 
+  uni=0;diz=0;cen=0;mil=0;dim=0;
+  tyn=0; if (bb==0) return;
+  uni=bb%10; bb=bb/10; if (bb==0){tyn=1;return;}
+  diz=bb%10; bb=bb/10; if (bb==0){tyn=2;return;}
+  cen=bb%10; bb=bb/10; if (bb==0){tyn=3;return;}
+  mil=bb%10; bb=bb/10; if (bb==0){tyn=4;return;}
+  dim=bb; tyn=5;
+}
+
+void Af5Dig() {
+ switch (moz) {
+  case 0: // Normal mode
+  switch (tyn) {
+    case 0:
+     Car(' '); Car(' '); Car(' ');Car(' ');Car(' ');Car('0');  Car(' ');  break;
+    case 1:
+     Car(' '); Car(' '); Car(' ');Car(' ');Car(sig);Car(uni+'0'); Car(' ');  break;
+    case 2:
+     Car(' '); Car(' '); Car(' ');Car(sig);Car(diz+'0');Car(uni+'0'); Car(' ');   break;
+    case 3:
+     Car(' '); Car(' '); Car(sig);Car(cen+'0');Car(diz+'0');Car(uni+'0'); Car(' ');   break;
+    case 4:
+     Car(' '); Car(sig); Car(mil+'0');Car(cen+'0');Car(diz+'0');Car(uni+'0'); Car(' ');   break;    
+    case 5:
+     Car(sig); Car(dim+'0'); Car(mil+'0');Car(cen+'0');Car(diz+'0');Car(uni+'0'); Car(' ');  break;
+  } // end switch tyn
+  break;
+  case 1: // Spaces
+   switch (tyn) { 
+    case 0: 
+     Car(' '); Car(' ');Car(' ');Car(' ');Car(' ');Car('0');  Car(' '); break;
+    case 1:
+     Car(sig);Car(' '); Car(' ');Car(' ');Car(' '); Car(uni+'0'); Car(' '); break;
+    case 2:
+     Car(sig); Car(' '); Car(' ');Car(' ');Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    case 3:
+     Car(sig); Car(' '); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    case 4:
+     Car(sig); Car(' ');Car(mil+'0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    case 5:
+     Car(sig); Car(dim+'0');Car(mil+'0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+   } // end switch tyn
+  break;  // case 1
+    case 2: // Zeros
+    switch (tyn) {
+    case 0:
+     Car(' '); Car('0');Car('0');Car('0');Car('0');Car('0'); Car(' '); break;
+    case 1:
+     Car(sig); Car('0');Car('0');Car('0'); Car('0'); Car(uni+'0'); Car(' '); break;
+    case 2:
+     Car(sig); Car('0');Car('0');Car('0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    case 3:
+     Car(sig); Car('0');Car('0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    case 4:
+     Car(sig); Car('0');Car(mil+'0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+    case 5:
+     Car(sig); Car(dim+'0');Car(mil+'0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+   } // end switch tyn
+   break;
+    case 3: // Compact
+     switch (tyn) {
+      case 0:
+       Car('0');  Car(' ');  break;
+      case 1:
+       Car(sig); Car(uni+'0'); Car(' ');  break;
+      case 2:
+       Car(sig); Car(diz+'0'); Car(uni+'0'); Car(' ');   break;
+      case 3:
+       Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+      case 4:
+       Car(sig); Car(mil+'0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
+      case 5:
+       Car(sig); Car(dim+'0');Car(mil+'0');Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;    
+     } // end switch tyn
+     break;
+   }  // end switch moz
+}
+
+// this macro generate a warning depending on sign
+#define Dec16(v)                 \
+    do { typeof(v) _v = -1;      \
+      if (_v < 0) { Dec16s(v); } \
+       else { Dec16u(v); }       \
+    } while(0);
+
+void Dec16u (uint16_t hh) {
+   sig=' ';
+   BinDec16(hh); Af5Dig();
+}
+
+void Dec16s (int16_t hh) {
+  if (hh<0) {  // négatif
+    sig='-'; hh = -hh;
+  } else {
+    sig='+';
+  }
+  BinDec16(hh); Af5Dig();
+}
+// end code
+
+
diff --git a/examples/TerSerTest/TerSerTest.ino b/examples/TerSerTest/TestTerSer.ino
similarity index 82%
rename from examples/TerSerTest/TerSerTest.ino
rename to examples/TerSerTest/TestTerSer.ino
index 3dd8fab..5fe3026 100644
--- a/examples/TerSerTest/TerSerTest.ino
+++ b/examples/TerSerTest/TestTerSer.ino
@@ -18,8 +18,7 @@ void loop(){  // empty 456 bytes 16 var
 for(;;);
 } 
 /*
-Size is 1014 bytes on my PC -0s  Compare witz TestSerial
-What you should see, size is 1032 bites on my PC -0s
+Size is 1242 bytes on my PC -0s  
 Test TerSer
 00010011 
 03E8  
diff --git a/src/TerSer.h b/src/TerSer.h
index f33ea4a..558b76c 100644
--- a/src/TerSer.h
+++ b/src/TerSer.h
@@ -1,50 +1,50 @@
-// TerSer.h  4 modes  190318 
-// 280 lines 7775 car
-//add in main program  #include "TerSer.h"  SetupTerSer();
-
+// TerSer.h  4 modes  190323 
+// ~280 lines ~7700 car
+//add to main program  #include "TerSer.h"  SetupTerSer();
+// or  from Arduino lib #include <TerSer.h>  SetupTerSer();
 void SetupTerSer() { 
   UBRR0= 103;  // 9600
   UCSR0B=0x18; // -- -- -- rxe txe -- -- --
   UCSR0C=0x06; // set mode: 8 data bits, no parity, 1 stop bit
 }
 
-byte moz=0;  // Default value
+uint8_t moz=0;  // Default value
 #define Normal moz=0
 #define Spaces moz=1
 #define Zeros  moz=2
 #define Compact moz=3
 
-byte Get() {  // read bloquant
+uint8_t Get() {  // read blocking
   while (!(UCSR0A&0x80)); // wait
   return UDR0; 
 }
 
-void Car( byte dd) {  // write bloquant 
+void Car( uint8_t dd) {  // write blocking
   while(!(UCSR0A&0x20));// wait 
   UDR0=dd;  // OK, send it now!
 }
 
 void CR() {
-  Car(13);Car(10);
+  Car(13);Car(10);  // CR LF
 }
 
 void Text(const char str[]) {
-  for (byte i=0; i< strlen(str); i++) { Car(str[i]); }
+  for (uint8_t i=0; i< strlen(str); i++) { Car(str[i]); }
 }
 
 void Textln(const char str[]) {
-   for (byte i=0; i< strlen(str); i++) { Car(str[i]); }
+   for (uint8_t i=0; i< strlen(str); i++) { Car(str[i]); }
    Car(13);Car(10);
 }
 
-void TtBin8 (byte bb) {  // auxiliary function
-  for (byte i=0;i<8;i++) {
+void TtBin8 (uint8_t bb) {  // auxiliary function
+  for (uint8_t i=0;i<8;i++) {
      if (bb&0x80) Car('1');
      else Car('0');
      bb <<= 1;
   }
 }
-void Bin8 (byte bb) {
+void Bin8 (uint8_t bb) {
   TtBin8 (bb); Car(' ');
 }
 void Bin16 (uint16_t bb) {
@@ -52,28 +52,29 @@ void Bin16 (uint16_t bb) {
  TtBin8 (bb&0xFF);
  Car(' ');
 }
-char ConvNibble (byte nn) { // converti 4 bit hexa en Ascii
-  byte cc;
+
+char ConvNibble (uint8_t nn) { //  4 bit binary to Ascii
+  uint8_t cc;
   if (nn<10) {cc = nn + '0';}
   else {cc = nn-10 + 'A';}
   return cc;
 }
 
-void Hex8 (byte hh) {
-  byte cc;
+void Hex8 (uint8_t hh) {
+  uint8_t cc;
   cc = ConvNibble (hh >> 4);  Car(cc);
   cc = ConvNibble (hh & 0x0F) ; Car(cc);
   Car(' '); // space
 }
 void Hex16 (uint16_t hh) {
-  volatile uint8_t cc;
+  uint8_t cc;
   cc = ConvNibble (hh >> 12) ;  Car(cc);
   cc = ConvNibble ((hh >> 8)&0x0F) ; Car(cc);
   cc=hh&0xFF; Hex8 (cc);
   Car(' ');
 }
 void Hex32 (uint32_t hh) {
-  volatile uint8_t cc;
+  uint8_t cc;
   cc = ConvNibble (hh >> 28) ;  Car(cc);
   cc = ConvNibble ((hh >> 24)&0x0F) ; Car(cc);
   cc = ConvNibble ((hh >> 20)&0x0F) ; Car(cc);
@@ -81,14 +82,13 @@ void Hex32 (uint32_t hh) {
   cc=hh&0xFFFF; Hex16 (cc);
   Car(' ');
 }
-// -- new functions with 4 modes
-   
-volatile uint8_t uni,diz,cen,mil,dim;
-volatile uint8_t tyn;  // type number
-volatile uint8_t sig;
-   
-   void Af5() {Car(dim+'0'); Car(mil+'0'); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');}
 
+// -- new Decimal functions with 4 modes (see above)
+   
+uint8_t uni,diz,cen,mil,dim;
+uint8_t tyn;  // type number
+uint8_t sig;
+ 
 void BinDec8 (uint8_t bb) {
   uni=0;diz=0;cen=0;
   tyn=0; if (bb==0) return;
@@ -110,7 +110,7 @@ void Af3Dig() {
     case 3:
      Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
    } // end switch tyn
-   break; // case moz 0
+   break; // end case moz 0
     case 1: // Spaces
     switch (tyn) { 
      case 0:
@@ -122,7 +122,7 @@ void Af3Dig() {
      case 3:
       Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
     } // end switch tyn
-  break;  // case moz 1
+  break;  // end case moz 1
     case 2: // Zeros
     switch (tyn) {
      case 0:
@@ -134,7 +134,7 @@ void Af3Dig() {
      case 3:
       Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
    } // end switch tyn
-   break; // case moz 2
+   break; // end case moz 2
     case 3: // Compact
     switch (tyn) {
      case 0:
@@ -146,10 +146,10 @@ void Af3Dig() {
      case 3:
       Car(sig); Car(cen+'0'); Car(diz+'0'); Car(uni+'0'); Car(' ');  break;
     } // end switch tyn
-    break; // case moz 3
+    break; // endcase moz 3
  }  // end switch moz
 }
-
+// this macro generate a warning depending on sign
 #define Dec8(v)                 \
     do { typeof(v) _v = -1;     \
       if (_v < 0) { Dec8s(v); } \
@@ -183,7 +183,7 @@ void BinDec16 (uint32_t bb) {
 
 void Af5Dig() {
  switch (moz) {
-  case 0: // Normal  signe devant le nombre
+  case 0: // Normal mode
   switch (tyn) {
     case 0:
      Car(' '); Car(' '); Car(' ');Car(' ');Car(' ');Car('0');  Car(' ');  break;
@@ -250,7 +250,7 @@ void Af5Dig() {
    }  // end switch moz
 }
 
-
+// this macro generate a warning depending on sign
 #define Dec16(v)                 \
     do { typeof(v) _v = -1;      \
       if (_v < 0) { Dec16s(v); } \