diff --git a/src/Thermal_Printer.cpp b/src/Thermal_Printer.cpp
index 72c7de0..4390ea7 100644
--- a/src/Thermal_Printer.cpp
+++ b/src/Thermal_Printer.cpp
@@ -5,18 +5,18 @@
 // Written by Larry Bank (bitbank@pobox.com)
 // Project started 1/6/2020
 //
-// Copyright 2020 BitBank Software, Inc. All Rights Reserved.
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//    http://www.apache.org/licenses/LICENSE-2.0
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//===========================================================================
-
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //
 #include <Arduino.h>
 // uncomment this line to see debug info on the serial monitor
@@ -27,7 +27,7 @@
 #include <BLEDevice.h>
 #endif
 
-#if defined(ARDUINO_SAMD_MKRWIFI1010) || defined(ARDUINO_SAMD_NANO_33_IOT) || defined(ARDUINO_ARDUINO_NANO33BLE)
+#ifdef ARDUINO_ARDUINO_NANO33BLE
 #include <ArduinoBLE.h>
 #endif
 
@@ -42,6 +42,7 @@ static int bb_width, bb_height; // back buffer width and height in pixels
 static int tp_wrap, bb_pitch;
 static int iCursorX = 0;
 static int iCursorY = 0;
+static uint8_t bWithResponse = 1; // default to wait for response
 static uint8_t *pBackBuffer = NULL;
 static uint8_t bConnected = 0;
 static void tpWriteData(uint8_t *pData, int iLen);
@@ -152,12 +153,17 @@ static BLEClient* pClient;
 static char Scanned_BLE_Name[32];
 #endif
 
-#if defined(ARDUINO_SAMD_MKRWIFI1010) || defined(ARDUINO_SAMD_NANO_33_IOT) || defined(ARDUINO_ARDUINO_NANO33BLE)
+#ifdef ARDUINO_ARDUINO_NANO33BLE
 static BLEDevice peripheral;
 static BLEService prtService;
 static BLECharacteristic pRemoteCharacteristicData;
 #endif
 
+void tpSetWriteMode(uint8_t bWriteMode)
+{
+   bWithResponse = bWriteMode;
+} /* tpSetWriteMode() */
+
 #ifdef HAL_ESP32_HAL_H_
 // Called for each device found during a BLE scan by the client
 class tpAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks
@@ -389,7 +395,22 @@ uint8_t bFlipped = false;
   } // for y
   return 0;
 } /* tpLoadBMP() */
-
+//
+// Connection status
+// true = connected, false = disconnected
+//
+int tpIsConnected(void)
+{
+  if (bConnected == 1) {
+     // we are/were connected, check...
+#ifdef HAL_ESP32_HAL_H_
+     if (pClient && pClient->isConnected())
+        return 1;
+     bConnected = 0; // change status to disconnected
+#endif // ESP32
+  }
+  return 0; // not connected
+} /* tpIsConnected() */
 //
 // After a successful scan, connect to the printer
 // returns 1 if successful, 0 for failure
@@ -433,7 +454,7 @@ int tpConnect(void)
     }
   return 0;
 #endif
-#if defined(ARDUINO_SAMD_MKRWIFI1010) || defined(ARDUINO_SAMD_NANO_33_IOT) || defined(ARDUINO_ARDUINO_NANO33BLE) // Arduino BLE
+#ifdef ARDUINO_ARDUINO_NANO33BLE // Arduino BLE
     if (!peripheral)
     {
 #ifdef DEBUG_OUTPUT
@@ -515,7 +536,7 @@ void tpDisconnect(void)
       bConnected = 0;
    }
 #endif
-#if defined(ARDUINO_SAMD_MKRWIFI1010) || defined(ARDUINO_SAMD_NANO_33_IOT) || defined(ARDUINO_ARDUINO_NANO33BLE)
+#ifdef ARDUINO_ARDUINO_NANO33BLE
     if (peripheral && bConnected)
     {
         if (peripheral.connected())
@@ -576,7 +597,7 @@ int iLen = strlen(szName);
        }
     }
 #endif
-#if defined(ARDUINO_SAMD_MKRWIFI1010) || defined(ARDUINO_SAMD_NANO_33_IOT) || defined(ARDUINO_ARDUINO_NANO33BLE) // Arduino API
+#ifdef ARDUINO_ARDUNIO_NANO33BLE // Arduino API
     // initialize the BLE hardware
     BLE.begin();
     // start scanning for the printer service UUID
@@ -668,10 +689,10 @@ static void tpWriteData(uint8_t *pData, int iLen)
     // Write BLE data without response, otherwise the printer
     // stutters and takes much longer to print
 #ifdef HAL_ESP32_HAL_H_
-    pRemoteCharacteristicData->writeValue(pData, iLen, false);
+    pRemoteCharacteristicData->writeValue(pData, iLen, bWithResponse);
 #endif
-#if defined(ARDUINO_SAMD_MKRWIFI1010) || defined(ARDUINO_SAMD_NANO_33_IOT) || defined(ARDUINO_ARDUINO_NANO33BLE)
-    pRemoteCharacteristicData.writeValue(pData, iLen);
+#ifdef ARDUINO_ARDUINO_NANO33BLE
+    pRemoteCharacteristicData.writeValue(pData, iLen, bWithResponse);
 #endif
 #ifdef ARDUINO_NRF52_ADAFRUIT
     myDataChar.write((const void *)pData, (uint16_t)iLen);
diff --git a/src/Thermal_Printer.h b/src/Thermal_Printer.h
index 5278ab0..9804b3b 100644
--- a/src/Thermal_Printer.h
+++ b/src/Thermal_Printer.h
@@ -3,17 +3,18 @@
 // written by Larry Bank
 // Copyright (c) 2020 BitBank Software, Inc.
 //
-// Copyright 2020 BitBank Software, Inc. All Rights Reserved.
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//    http://www.apache.org/licenses/LICENSE-2.0
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//===========================================================================
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //
 
 #ifndef __THERMAL_PRINTER_H__
@@ -57,6 +58,16 @@ int tpPrint(char *pString);
 // the paper one line
 //
 int tpPrintLine(char *pString);
+
+#define MODE_WITH_RESPONSE 1
+#define MODE_WITHOUT_RESPONSE 0
+//
+// Set the BLE write mode
+// MODE_WITH_RESPONSE asks the receiver to ack each packet
+// it will be slower, but might be necessary to successfully transmit
+// every packet. The default is to wait for a response for each write
+//
+void tpSetWriteMode(uint8_t bWriteMode);
 //
 // Draw text into the graphics buffer
 //
@@ -100,4 +111,5 @@ int tpScan(const char *szName, int iSeconds);
 //
 int tpConnect(void);
 void tpDisconnect(void);
+int tpIsConnected(void);
 #endif // __THERMAL_PRINTER_H__