diff --git a/app/src/main/java/info/nightscout/android/medtronic/MedtronicCnlReader.java b/app/src/main/java/info/nightscout/android/medtronic/MedtronicCnlReader.java
index 22c888d1dbabeb951d17cbf78871f31606466f02..8dde933c07b0fb57bf6ff50367fd91e94e103644 100644
--- a/app/src/main/java/info/nightscout/android/medtronic/MedtronicCnlReader.java
+++ b/app/src/main/java/info/nightscout/android/medtronic/MedtronicCnlReader.java
@@ -9,7 +9,6 @@ import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Date;
-import java.util.Locale;
 import java.util.concurrent.TimeoutException;
 
 import info.nightscout.android.USB.UsbHidDriver;
@@ -51,7 +50,7 @@ public class MedtronicCnlReader {
     private MedtronicCnlSession mPumpSession = new MedtronicCnlSession();
     private String mStickSerial = null;
 
-    private static final int TIMEOUT_MS = 0; //500  note: using a read "pause" has no effect on outcome and likely redundant due to clearMessage intercepting unread messages
+    private static final int SLEEP_MS = 500;
 
     public MedtronicCnlReader(UsbHidDriver device) {
         mDevice = device;
@@ -80,9 +79,9 @@ public class MedtronicCnlReader {
             doRetry = false;
             try {
                 new ContourNextLinkCommandMessage(ContourNextLinkCommandMessage.ASCII.NAK)
-                        .send(mDevice, TIMEOUT_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.EOT);
+                        .send(mDevice, SLEEP_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.EOT);
                 new ContourNextLinkCommandMessage(ContourNextLinkCommandMessage.ASCII.ENQ)
-                        .send(mDevice, TIMEOUT_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
+                        .send(mDevice, SLEEP_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
             } catch (UnexpectedMessageException e2) {
                 try {
                     new ContourNextLinkCommandMessage(ContourNextLinkCommandMessage.ASCII.EOT).send(mDevice);
@@ -97,11 +96,11 @@ public class MedtronicCnlReader {
     public void enterPassthroughMode() throws IOException, TimeoutException, UnexpectedMessageException, ChecksumException, EncryptionException {
         Log.d(TAG, "Begin enterPasshtroughMode");
         new ContourNextLinkCommandMessage("W|")
-                .send(mDevice, TIMEOUT_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
+                .send(mDevice, SLEEP_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
         new ContourNextLinkCommandMessage("Q|")
-                .send(mDevice, TIMEOUT_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
+                .send(mDevice, SLEEP_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
         new ContourNextLinkCommandMessage("1|")
-                .send(mDevice, TIMEOUT_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
+                .send(mDevice, SLEEP_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
         Log.d(TAG, "Finished enterPasshtroughMode");
     }
 
@@ -226,18 +225,18 @@ public class MedtronicCnlReader {
     public void endPassthroughMode() throws IOException, TimeoutException, UnexpectedMessageException, ChecksumException, EncryptionException {
         Log.d(TAG, "Begin endPassthroughMode");
         new ContourNextLinkCommandMessage("W|")
-                .send(mDevice, TIMEOUT_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
+                .send(mDevice, SLEEP_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
         new ContourNextLinkCommandMessage("Q|")
-                .send(mDevice, TIMEOUT_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
+                .send(mDevice, SLEEP_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
         new ContourNextLinkCommandMessage("0|")
-                .send(mDevice, TIMEOUT_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
+                .send(mDevice, SLEEP_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ACK);
         Log.d(TAG, "Finished endPassthroughMode");
     }
 
     public void endControlMode() throws IOException, TimeoutException, UnexpectedMessageException, ChecksumException, EncryptionException {
         Log.d(TAG, "Begin endControlMode");
         new ContourNextLinkCommandMessage(ContourNextLinkCommandMessage.ASCII.EOT)
-                .send(mDevice, TIMEOUT_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ENQ);
+                .send(mDevice, SLEEP_MS).checkControlMessage(ContourNextLinkCommandMessage.ASCII.ENQ);
         Log.d(TAG, "Finished endControlMode");
     }
 }