diff --git a/CCDebugger.c b/CCDebugger.c
index 6f17a1c..80335f7 100644
--- a/CCDebugger.c
+++ b/CCDebugger.c
@@ -39,9 +39,9 @@
   /**
    * Local properties
    */
-  int       pinRST=24;
-  int       pinDC=28;
-  int       pinDD=29;
+  int       pinRST= PIN_RST;
+  int       pinDC= PIN_DC;
+  int       pinDD= PIN_DD;
   uint8_t      errorFlag=0;
   uint8_t      ddIsOutput=false;
   uint8_t      inDebugMode=false;
@@ -72,16 +72,16 @@
 void cc_delay_calibrate( );
 int cc_init( int pRST, int pDC, int pDD )
 {
+  if(pRST>=0) pinRST=pRST;
+  if(pDC>=0) pinDC=pDC;
+  if(pDD>=0) pinDD=pDD;
+
   if(wiringPiSetup() == -1){
     printf("no wiring pi detected\n");
     return 0;
   }
   cc_delay_calibrate();
 
-  pinRST=pRST;
-  pinDC=pDC;
-  pinDD=pDD;
-
   // Prepare CC Pins
   pinMode(pinDC,        OUTPUT);
   pinMode(pinDD,      OUTPUT);
diff --git a/CCDebugger.h b/CCDebugger.h
index aa0123b..edd6b41 100644
--- a/CCDebugger.h
+++ b/CCDebugger.h
@@ -7,6 +7,18 @@
 #define CC_ERROR_NOT_DEBUGGING  2
 #define CC_ERROR_NOT_WIRED      3
 
+// defaŭltaj valoroj por pingloj
+// por restarigi al pinglo 35, DC al pinglo 36, DD al pinglo 38
+#define PIN_RST 24
+#define PIN_DC  27
+#define PIN_DD 28
+
+// alternativaj valoroj por pingloj
+// por restarigi al pinglo 3, DC al pinglo 11, DD al pinglo 13
+// Utila por pi 1.
+//#define PIN_RST 8
+//#define PIN_DC  0
+//#define PIN_DD 2
 
   int cc_init( int pinRST, int pinDC, int pinDD );
   void cc_delay( unsigned char d );
diff --git a/README.md b/README.md
index 0454cc6..25a80a8 100644
--- a/README.md
+++ b/README.md
@@ -12,9 +12,9 @@ git clone https://github.com/jmichault/flash_cc2531.git
 ```
 Connect the following pins of the debug port to the GPIO port :
 1. pin 1 (GND)	  -->	pin 39 (GND)
-2. pin 7 (reset)	-->	pin 35 (GPIO24, BCM19)
-3. pin 3 (DC)	  -->	pin 36 (GPIO27, BCM16)
-4. pin 4 (DD)	  -->	pin 38 (GPIO28, BCM20)
+2. pin 7 (reset)	-->	pin 35 (wPi 24, BCM19)
+3. pin 3 (DC)	  -->	pin 36 (wPi 27, BCM16)
+4. pin 4 (DD)	  -->	pin 38 (wPi 28, BCM20)
 
 and insert the usb dongle in a port.
 
@@ -51,6 +51,30 @@ To flash file to cc2531 :
 ```
 (takes around 3 minutes).
 
+## Using other pins
+all commands accept following arguments :
+	-c pin : change pin_DC (default 27)
+	-d pin : change pin_DD (default 28)
+	-r pin : change reset pin (default 24)
+
+the pin numbering used is that of wiringPi. Use "gpio readall" to have the layout on your pi (wPi column).
+
+example, if you want to use pins 3, 11 and 13 : 
+Connect the following pins of the debug port to the GPIO port :
+1. pin 1 (GND)	  -->	pin 14 (GND)
+2. pin 7 (reset)	-->	pin 3 (wPi 8, BCM2)
+3. pin 3 (DC)	  -->	pin 11 (wPi 0, BCM17)
+4. pin 4 (DD)	  -->	pin 13 (wPi 2, BCM27)
+
+and now you can read chip id, save flash content, erase flash, and write flash with following commands :
+```bash
+./cc_chipid -r 8 -c 0 -d 2
+./cc_read -r 8 -c 0 -d 2 save.hex
+./cc_erase -r 8 -c 0 -d 2
+./cc_write -r 8 -c 0 -d 2 CC2531ZNP-Pro.hex
+```
+
+You can also change default values in CCDebugger.h and recompile executables with make.
 
 ## License
 
diff --git a/cc_chipid b/cc_chipid
index 3b89c44..3427c93 100755
Binary files a/cc_chipid and b/cc_chipid differ
diff --git a/cc_chipid.c b/cc_chipid.c
index 32fab6a..53d59b0 100644
--- a/cc_chipid.c
+++ b/cc_chipid.c
@@ -20,13 +20,46 @@
 #include <stdbool.h>
 #include <string.h>
 #include <stdint.h>
+#include <unistd.h>
 
 #include "CCDebugger.h"
 
-int main()
+void helpo()
 {
+  fprintf(stderr,"usage : cc_chipid [-d pin_DD] [-c pin_DC] [-r pin_reset]\n"); 
+  fprintf(stderr,"	-c : change pin_DC (default 27)\n");
+  fprintf(stderr,"	-d : change pin_DD (default 28)\n");
+  fprintf(stderr,"	-r : change reset pin (default 24)\n");
+}
+
+int main(int argc,char *argv[])
+{
+  int opt;
+  int rePin=-1;
+  int dcPin=-1;
+  int ddPin=-1;
+  while( (opt=getopt(argc,argv,"d:c:r:h?")) != -1)
+  {
+    switch(opt)
+    {
+     case 'd' : // DD pinglo
+      ddPin=atoi(optarg);
+      break;
+     case 'c' : // DC pinglo
+      dcPin=atoi(optarg);
+      break;
+     case 'r' : // restarigi pinglo
+      rePin=atoi(optarg);
+      break;
+     case 'h' : // helpo
+     case '?' : // helpo
+      helpo();
+      exit(0);
+      break;
+    }
+  }
   // initialize GPIO and debugger
-  cc_init(24,27,28);
+  cc_init(rePin,dcPin,ddPin);
   // enter debug mode
   cc_enter();
   // get ChipID :
diff --git a/cc_erase b/cc_erase
index c106499..c04436a 100755
Binary files a/cc_erase and b/cc_erase differ
diff --git a/cc_erase.c b/cc_erase.c
index 752a962..5e52464 100644
--- a/cc_erase.c
+++ b/cc_erase.c
@@ -20,13 +20,46 @@
 #include <stdbool.h>
 #include <string.h>
 #include <stdint.h>
+#include <unistd.h>
 
 #include "CCDebugger.h"
 
-int main()
+void helpo()
 {
+  fprintf(stderr,"usage : cc_erase [-d pin_DD] [-c pin_DC] [-r pin_reset]\n"); 
+  fprintf(stderr,"	-c : change pin_DC (default 27)\n");
+  fprintf(stderr,"	-d : change pin_DD (default 28)\n");
+  fprintf(stderr,"	-r : change reset pin (default 24)\n");
+}
+
+int main(int argc,char *argv[])
+{
+  int opt;
+  int rePin=-1;
+  int dcPin=-1;
+  int ddPin=-1;
+  while( (opt=getopt(argc,argv,"d:c:r:h?")) != -1)
+  {
+    switch(opt)
+    {
+     case 'd' : // DD pinglo
+      ddPin=atoi(optarg);
+      break;
+     case 'c' : // DC pinglo
+      dcPin=atoi(optarg);
+      break;
+     case 'r' : // restarigi pinglo
+      rePin=atoi(optarg);
+      break;
+     case 'h' : // helpo
+     case '?' : // helpo
+      helpo();
+      exit(0);
+      break;
+    }
+  }
   // initialize GPIO and debugger
-  cc_init(24,27,28);
+  cc_init(rePin,dcPin,ddPin);
   // enter debug mode
   cc_enter();
   // get ChipID :
diff --git a/cc_read b/cc_read
index ca572da..0efd9e3 100755
Binary files a/cc_read and b/cc_read differ
diff --git a/cc_read.c b/cc_read.c
index 7788fe5..b0c1c44 100644
--- a/cc_read.c
+++ b/cc_read.c
@@ -20,6 +20,7 @@
 #include <stdbool.h>
 #include <string.h>
 #include <stdint.h>
+#include <unistd.h>
 
 #include "CCDebugger.h"
 
@@ -59,13 +60,45 @@ void read1k(int bank,uint16_t offset,uint8_t * buf)
     }
 }
 
-int main(int argc,char **argv)
+void helpo()
 {
-  if( argc <2 ) { fprintf(stderr,"usage : %s outfile\n",argv[0]); exit(1); }
-  FILE * ficout = fopen(argv[1],"w");
-  if(!ficout) { fprintf(stderr," Can't open file %s.\n",argv[1]); exit(1); }
+  fprintf(stderr,"usage : cc_read [-d pin_DD] [-c pin_DC] [-r pin_reset] out_file\n"); 
+  fprintf(stderr,"	-c : change pin_DC (default 27)\n");
+  fprintf(stderr,"	-d : change pin_DD (default 28)\n");
+  fprintf(stderr,"	-r : change reset pin (default 24)\n");
+}
+
+int main(int argc,char *argv[])
+{
+  int opt;
+  int rePin=-1;
+  int dcPin=-1;
+  int ddPin=-1;
+  while( (opt=getopt(argc,argv,"d:c:r:h?")) != -1)
+  {
+    switch(opt)
+    {
+     case 'd' : // DD pinglo
+      ddPin=atoi(optarg);
+      break;
+     case 'c' : // DC pinglo
+      dcPin=atoi(optarg);
+      break;
+     case 'r' : // restarigi pinglo
+      rePin=atoi(optarg);
+      break;
+     case 'h' : // helpo
+     case '?' : // helpo
+      helpo();
+      exit(0);
+      break;
+    }
+  }
+  if( optind >= argc ) { helpo(); exit(1); }
+  FILE * ficout = fopen(argv[optind],"w");
+  if(!ficout) { fprintf(stderr," Can't open file %s.\n",argv[optind]); exit(1); }
   //  initialize GPIO ports
-  cc_init(24,27,28);
+  cc_init(rePin,dcPin,ddPin);
   // enter debug mode
   cc_enter();
   // get ChipID :
diff --git a/cc_write b/cc_write
index 48ed5c8..615ed1a 100755
Binary files a/cc_write and b/cc_write differ
diff --git a/cc_write.c b/cc_write.c
index 70ccc6c..2fa6166 100644
--- a/cc_write.c
+++ b/cc_write.c
@@ -217,13 +217,45 @@ int writePage(int page)
   
 }
 
-int main(int argc,char **argv)
+void helpo()
 {
-  if( argc <2 ) { fprintf(stderr,"usage : %s file_to_flash\n",argv[0]); exit(1); }
- FILE * ficin = fopen(argv[1],"r");
-  if(!ficin) { fprintf(stderr," Can't open file %s.\n",argv[1]); exit(1); }
+  fprintf(stderr,"usage : cc_write [-d pin_DD] [-c pin_DC] [-r pin_reset] file_to_flash\n"); 
+  fprintf(stderr,"	-c : change pin_DC (default 27)\n");
+  fprintf(stderr,"	-d : change pin_DD (default 28)\n");
+  fprintf(stderr,"	-r : change reset pin (default 24)\n");
+}
+
+int main(int argc,char *argv[])
+{
+  int opt;
+  int rePin=24;
+  int dcPin=27;
+  int ddPin=28;
+  while( (opt=getopt(argc,argv,"d:c:r:h?")) != -1)
+  {
+    switch(opt)
+    {
+     case 'd' : // DD pinglo
+      ddPin=atoi(optarg);
+      break;
+     case 'c' : // DC pinglo
+      dcPin=atoi(optarg);
+      break;
+     case 'r' : // restarigi pinglo
+      rePin=atoi(optarg);
+      break;
+     case 'h' : // helpo
+     case '?' : // helpo
+      helpo();
+      exit(0);
+      break;
+    }
+  }
+  if( optind >= argc ) { helpo(); exit(1); }
+ FILE * ficin = fopen(argv[optind],"r");
+  if(!ficin) { fprintf(stderr," Can't open file %s.\n",argv[optind]); exit(1); }
   // on initialise les ports GPIO et le debugger
-  cc_init(24,27,28);
+  cc_init(rePin,dcPin,ddPin);
   // entrée en mode debug
   cc_enter();
   // envoi de la commande getChipID :