diff --git a/firmware/command_ctrl.ino b/firmware/command_ctrl.ino
index 8720b29..a031293 100644
--- a/firmware/command_ctrl.ino
+++ b/firmware/command_ctrl.ino
@@ -220,7 +220,7 @@ void cc_startMeasurement()
     }
 
     uint32_t freq = 0;
-    for (freq = start_freq; freq < end_freq; freq += step_freq)
+    for (freq = start_freq; freq <= end_freq; freq += step_freq)
     {
       uint32_t a0_sum  = 0;
       uint32_t a1_sum  = 0;
@@ -510,4 +510,4 @@ void cc_clearReadDataBuffer()
 }
 
 /*****************************************************************************/
-
+