diff --git a/TCLab-sketch/TCLab-sketch.ino b/TCLab-sketch/TCLab-sketch.ino
index e446f97..d8d3448 100644
--- a/TCLab-sketch/TCLab-sketch.ino
+++ b/TCLab-sketch/TCLab-sketch.ino
@@ -96,8 +96,8 @@ const char sp = ' ';           // command separator
 const char nl = '\n';          // command terminator
 
 // pin numbers corresponding to signals on the TC Lab Shield
-const int pinT1   = 0;         // T1
-const int pinT2   = 2;         // T2
+const int pinT1   = 5;         // before 0; T1 in the TCLab 1v1 is modified
+const int pinT2   = 3;         // before 2; T2 in the TCLab 1v1 is modified
 const int pinQ1   = 3;         // Q1
 const int pinQ2   = 5;         // Q2
 const int pinLED1 = 9;         // LED1