diff --git a/circuitpython/code/main.py b/circuitpython/code/main.py
index c5803a8..4ef43bc 100644
--- a/circuitpython/code/main.py
+++ b/circuitpython/code/main.py
@@ -30,7 +30,10 @@ Pins used:
  * D13 : onboard LED (as RW/RO indicator)
 
 Back pins diagramm:
-    D05 A2  A3  D09 NC_
+    D05 A2  A3  D09 NC
+    GND GND SCL SDA 3V3
+
+    RW  TX  RX  EN  NC
     GND GND SCL SDA 3V3
 
 Git repository :