diff --git a/serial/essai.sh b/serial/essai.sh
index 6c5d337..4b2d194 100755
--- a/serial/essai.sh
+++ b/serial/essai.sh
@@ -5,7 +5,7 @@ DATAFILE="foo.dat"
 TMPFILE="/tmp/dd2data"
 
 IMAGE="graphe.png"
-NB_READ=25
+NB_READ=9500
 
 ./t -vv -n ${NB_READ} -d ${DEVICE} | tee -a ${DATAFILE}
 
diff --git a/serial/t.c b/serial/t.c
index 69af8a7..4f4b2e3 100644
--- a/serial/t.c
+++ b/serial/t.c
@@ -30,7 +30,8 @@ for (count=0; count<iters; count++) {
 	foo = getline_to(sfd, ligne, 100, 0);
 	//
 	if (verbosity > 1) {
-		fprintf(stderr, "getline #%d -> %d\n", count, foo);
+		fprintf(stderr, "getline #%d on %d -> %d\n",
+					count, iters, foo);
 		fprintf(stderr, "%s\n", ligne);
 		}
 	foo = parse4values(ligne, 'T', datas);