diff --git a/.gitignore b/.gitignore
index c41f84f..41bac6b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@ fake-values
 essai
 serial/t
 core/t
+core/*.a
 
 doc/*.toc
 doc/*.log
diff --git a/BUILD.txt b/BUILD.txt
index fb24a49..cb4ef81 100644
--- a/BUILD.txt
+++ b/BUILD.txt
@@ -11,6 +11,7 @@ First step, build some parts of the core library :
 
 Then you must have datas for working on. One source of datas
 is the four values who came from the Arduino over serial line.
+At this time, you must look at the configuration file.
 
 	$ cd serial
 	$ make t
diff --git a/core/config.h b/core/config.h
index 4c3b105..1e3d063 100644
--- a/core/config.h
+++ b/core/config.h
@@ -8,7 +8,7 @@ typedef struct {
 
 	int	valid;
 	
-
+	char	*input_device;
 
 
 	} Configuration;
diff --git a/core/dd2-monitor.conf b/core/dd2-monitor.conf
index 2b79cff..8020bcb 100644
--- a/core/dd2-monitor.conf
+++ b/core/dd2-monitor.conf
@@ -1,10 +1,9 @@
-
+#
 # experimental config file
+#
 
-
-input_device	s	/def/ttyACM0
-
-
+input_device	s	/dev/ttyACM0
+input_speed	s	9600
 
 
 
diff --git a/core/parseconf.c b/core/parseconf.c
index 56af341..1bf1b99 100644
--- a/core/parseconf.c
+++ b/core/parseconf.c
@@ -10,13 +10,14 @@
 extern int 			verbosity;
 extern Configuration		config;
 
-#define  CMP(a)   (!strcmp(cptr, a))
+#define  CMP(a)   (!strcmp(keyptr, a))
 
 /* ---------------------------------------------------------------- */
 int parse_config(char *fname, int flags)
 {
 FILE		*fp;
-char		line[SZ_STRINGS+1], *cptr;
+char		line[SZ_STRINGS+1],
+		*keyptr, *typeptr, *cptr;
 int		numligne;
 
 #if DEBUG_LEVEL
@@ -49,23 +50,35 @@ while (fgets(line, SZ_STRINGS, fp))
 		}
 
 	/* seek for the first token in this line */
-	if (NULL==(cptr = strtok(line, " \t"))) {
+	if (NULL==(keyptr = strtok(line, " \t"))) {
 		/* Got an empty line */
 		continue;
 		}
-
 	/* skip comments */
-	if ('#'==*cptr)		continue;
-
-	if(verbosity)	fprintf(stderr, "[%s]\n", cptr);
+	if ('#'==*keyptr)		continue;
+	/* seek for the type field */
+	if (NULL==(typeptr = strtok(NULL, " \t"))) {
+		/* we can(t get a type flag ? wtf ? */
+		fprintf(stderr, "ERROR line %d : no type\n", numligne); 
+		continue;
+		}
 
+	if(verbosity)
+		fprintf(stderr, "[%s] type %s\n", keyptr, typeptr);
 
+	if CMP("abort") { 
+		fprintf(stderr, "abort in config file\n");
+		}
 
+	if (CMP("input_device")) {
+		config.input_device = strdup(strtok(NULL, " \t"));
+		continue;
+		}
 	}
 
 fclose(fp);
 
-return -1;
+return 0;
 }
 /* ---------------------------------------------------------------- */
 int show_config(char *title)
@@ -75,7 +88,8 @@ if (verbosity) {
 	printf("********** %s **********\n", title);
 	}
 
-printf("valid         %d\n", config.valid);
+printf("valid           :  %d\n", config.valid);
+printf("input device    :  %s\n", config.input_device);
 
 puts("");
 return 0;
diff --git a/core/t.c b/core/t.c
index 835fa58..059efa1 100644
--- a/core/t.c
+++ b/core/t.c
@@ -42,7 +42,7 @@ while ((opt = getopt(argc, argv, "v")) != -1) {
 	}
 
 
-foo = parse_config(conffile, 1);
+foo = parse_config(conffile, 0);
 fprintf(stderr, "parse_config(%s) -> %d\n\n", conffile, foo);
 show_config("foo");