diff --git a/fw_build.sh b/fw_build.sh
index cd2d895..a83f9fb 100644
--- a/fw_build.sh
+++ b/fw_build.sh
@@ -88,6 +88,17 @@
 #
 # 9. Install the ESP32 core:
 #    ./arduino-cli core install esp32:esp32
+#
+# 10. for updating the ESP32 core and libraries:
+#    ./arduino-cli core list
+#    ./arduino-cli core update-index
+#    ./arduino-cli core upgrade
+#    ./arduino-cli core list
+#    ./arduino-cli lib list
+#    ./arduino-cli lib update-index
+#    ./arduino-cli lib upgrade
+#    ./arduino-cli lib list
+#
 
 # ---------------------------------------------
 set -e
@@ -102,6 +113,20 @@ if [ ! -f arduino-cli ]; then
    exit 1
 fi
 
+echo "----------------------------------------------"
+echo "Check updated libraries"
+./arduino-cli lib list
+./arduino-cli lib update-index
+./arduino-cli lib upgrade
+./arduino-cli lib list
+
+echo "----------------------------------------------"
+echo "Check updated cores"
+./arduino-cli core list
+./arduino-cli core update-index
+./arduino-cli core upgrade
+./arduino-cli core list
+
 mkdir -p ../build/output
 build_start=`date`