diff --git a/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/impedance_meter.h b/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/impedance_meter.h
index af52f9fff..c7e024758 100644
--- a/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/impedance_meter.h
+++ b/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/impedance_meter.h
@@ -168,7 +168,8 @@ static void SimpleBLEPeripheral_performPeriodicTask(WorkMode *WorkModeData) {
         GPT.BatteryCheckCounter = GPT.BatteryCheckCounter + GPT.DeltaGptimerCounter;
         if(GPT.BatteryCheckCounter >= 50000){
             GPT.BatteryCheckCounter -= 50000; //To get right time
-            batteryCheck_flag = true;
+//            batteryCheck_flag = true;
+            batteryCheck_flag = false;  // set flag "false" for calibration mode
         }
 
         uint16_t bat = ((uint16_t)(NotifyVoltBat[2]) << 8 & 0xFF00 ) | ((uint16_t)(NotifyVoltBat[3]) & 0x00FF);