diff --git a/doc/erko_howto_tools.txt b/doc/erko_howto_tools.txt
index c4b3b44bde90fa337d979c2b02240a95edd3c2b2..188d3db4b11f7f2a8d4624e045e4a6a3be4976d8 100755
--- a/doc/erko_howto_tools.txt
+++ b/doc/erko_howto_tools.txt
@@ -340,6 +340,19 @@ sdp_firmware.py --host 10.87.0.186 --port 4842 --read --verify --image USER --fi
 sdp_rw.py --host 10.87.0.186 --port 4842 -w boot_image [1]*16
 sdp_rw.py --host 10.87.0.186 --port 4842 -r firmware_version
 
+
+*******************************************************************************
+Reset UNB2b ARTS boards in Lab
+
+    op dop386, start firefox
+    ga naar 10.99.99.99
+    arts / arts
+    ga naar Web HMI / Web HMI
+    Digital Outputs
+    Zet alle knoppen op ON
+    Zet vervolgens all knoppen weer op OFF
+    klaar
+
 *******************************************************************************
 
 4 sept 2023