diff --git a/pypcc/testing/lmp_id.py b/pypcc/testing/lmp_id.py
index b346a51e8b36b9b999f973d561de54de280a6b75..220599e93bcb5211b17d2539cb5c23378e2f3e1e 100644
--- a/pypcc/testing/lmp_id.py
+++ b/pypcc/testing/lmp_id.py
@@ -1,4 +1,12 @@
 import RPi.GPIO as GPIO
+#LMP LMP APSCT  CM  rpi
+#DIP CON BCK_ID PIN GPIO
+#UNB D8   0     27  20
+# 1  E8   1     25  21
+# 2  E7   2     31  12
+# 3  F7   3     29  16
+# 4  D10  4     39   8
+# 5  E10  5     37   7
 
 def get_LMP_ID():
 #    pins=[21,20,16,12,7,8]