diff --git a/system/clearpilot/dev/on_start.sh b/system/clearpilot/dev/on_start.sh
index 0c581c4..2528767 100644
--- a/system/clearpilot/dev/on_start.sh
+++ b/system/clearpilot/dev/on_start.sh
@@ -1,5 +1,11 @@
 #!/bin/bash
 
+# tmp for debugging
+date >> /tmp/dongles
+echo check dongle >> /tmp/dongles
+cat /data/params/d/DongleId >> /tmp/dongles
+echo done >> /tmp/dongles
+
 dongle_id=$(cat /data/params/d/DongleId)
 if [[ ! $dongle_id == 90bb71* ]]; then
     exit 1