diff --git a/serial/essai.sh b/serial/essai.sh
index 9d4e8bc..2526c3e 100755
--- a/serial/essai.sh
+++ b/serial/essai.sh
@@ -5,7 +5,7 @@ DATAFILE="foo.dat"
 TMPFILE="/tmp/dd2data"
 
 IMAGE="graphe.png"
-NB_READ=15000
+NB_READ=25000
 
 ./t -v -n ${NB_READ} -d ${DEVICE} | tee -a ${DATAFILE}