add serial section's subsections

diff --git a/curriculum/challenge-bot.scm b/curriculum/challenge-bot.scm
index fb4b47bf1fd3c905be2dd76989dde0382eec0197..2e9f0cdef7d809c022ab16e33bc5acc9e9777605 100644 (file)
--- a/curriculum/challenge-bot.scm
+++ b/curriculum/challenge-bot.scm
@@ -46,7 +46,15 @@
  (chapter
   :title [wiring and software]
   (section
-   :title [serial])
+   :title [serial]
+   (subsection
+    :title [arduino software on computer])
+   (subsection
+    :title [attach arduino and computer via cable])
+   (subsection
+    :title [debugging common connection problems])
+   (subsection
+    :title [arduino reset button]))
   (section
    :title [left sonar])
   (section