diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/comm/DanaRS_Packet.java b/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/comm/DanaRS_Packet.java
index dbc5c017f9..eb9a91698a 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/comm/DanaRS_Packet.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/comm/DanaRS_Packet.java
@@ -137,18 +137,6 @@ public class DanaRS_Packet {
 		return sb.toString();
 	}
 
-	final private static char[] hexArray = "0123456789ABCDEF".toCharArray();
-
-	public static String bytesToHex(byte[] bytes) {
-		char[] hexChars = new char[bytes.length * 2];
-		for (int j = 0; j < bytes.length; j++) {
-			int v = bytes[j] & 0xFF;
-			hexChars[j * 2] = hexArray[v >>> 4];
-			hexChars[j * 2 + 1] = hexArray[v & 0x0F];
-		}
-		return new String(hexChars);
-	}
-
 	public static byte[] hexToBytes(String s) {
 		int len = s.length();
 		byte[] data = new byte[len / 2];
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/services/DanaRSService.java b/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/services/DanaRSService.java
index 4a7cffc3d7..65f4326e20 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/services/DanaRSService.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/PumpDanaRS/services/DanaRSService.java
@@ -782,8 +782,8 @@ public class DanaRSService extends Service {
                                     SendTimeInfo();
                                     byte[] pairingKey = {inputBuffer[2], inputBuffer[3]};
                                     // store pairing key to preferences
-                                    SP.putString(R.string.key_danars_pairingkey, DanaRS_Packet.bytesToHex(pairingKey));
-                                    log.debug("Got pairing key: " + DanaRS_Packet.bytesToHex(pairingKey));
+                                    SP.putString(R.string.key_danars_pairingkey, DanaRS_Packet.toHexString(pairingKey));
+                                    log.debug("Got pairing key: " + DanaRS_Packet.toHexString(pairingKey));
                                     break;
                                 // time and user password information. last packet in handshake
                                 case (byte) BleCommandUtil.DANAR_PACKET__OPCODE_ENCRYPTION__TIME_INFORMATION: