diff --git a/libraries/MCP23017_RT/CHANGELOG.md b/libraries/MCP23017_RT/CHANGELOG.md
index 50fcd8c7..17ff5e14 100644
--- a/libraries/MCP23017_RT/CHANGELOG.md
+++ b/libraries/MCP23017_RT/CHANGELOG.md
@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 
+## [0.6.0] 2023-12-24
+- Fix #26, support for Arduino ESP32 S3 - breaking change
+- update readme.md
+- update examples.
+
+----
+
 ## [0.5.0] 2023-12-10
 - refactor API, begin()
 - add **uimt8_t getADdress()**
diff --git a/libraries/MCP23017_RT/MCP23017.cpp b/libraries/MCP23017_RT/MCP23017.cpp
index f3c0434e..68ad72c3 100644
--- a/libraries/MCP23017_RT/MCP23017.cpp
+++ b/libraries/MCP23017_RT/MCP23017.cpp
@@ -1,7 +1,7 @@
 //
 //    FILE: MCP23017.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.5.0
+// VERSION: 0.6.0
 // PURPOSE: Arduino library for I2C MCP23017 16 channel port expander
 //    DATE: 2019-10-12
 //     URL: https://github.com/RobTillaart/MCP23017_RT
@@ -80,7 +80,7 @@ uint8_t MCP23017::getAddress()
 //  single pin interface
 //  pin  = 0..15
 //  mode = INPUT, OUTPUT, INPUT_PULLUP (= same as INPUT)
-bool MCP23017::pinMode(uint8_t pin, uint8_t mode)
+bool MCP23017::pinMode1(uint8_t pin, uint8_t mode)
 {
   if (pin > 15)
   {
@@ -126,7 +126,7 @@ bool MCP23017::pinMode(uint8_t pin, uint8_t mode)
 
 //  pin   = 0..15
 //  value = LOW, HIGH
-bool MCP23017::digitalWrite(uint8_t pin, uint8_t value)
+bool MCP23017::write1(uint8_t pin, uint8_t value)
 {
   if (pin > 15)
   {
@@ -168,7 +168,7 @@ bool MCP23017::digitalWrite(uint8_t pin, uint8_t value)
 }
 
 
-uint8_t MCP23017::digitalRead(uint8_t pin)
+uint8_t MCP23017::read1(uint8_t pin)
 {
   if (pin > 15)
   {
diff --git a/libraries/MCP23017_RT/MCP23017.h b/libraries/MCP23017_RT/MCP23017.h
index f992665f..8f04e22c 100644
--- a/libraries/MCP23017_RT/MCP23017.h
+++ b/libraries/MCP23017_RT/MCP23017.h
@@ -2,7 +2,7 @@
 //
 //    FILE: MCP23017.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.5.0
+// VERSION: 0.6.0
 // PURPOSE: Arduino library for I2C MCP23017 16 channel port expander
 //    DATE: 2019-10-12
 //     URL: https://github.com/RobTillaart/MCP23017_RT
@@ -14,7 +14,7 @@
 #include "Wire.h"
 
 
-#define MCP23017_LIB_VERSION              (F("0.5.0"))
+#define MCP23017_LIB_VERSION              (F("0.6.0"))
 
 #define MCP23017_OK                       0x00
 #define MCP23017_PIN_ERROR                0x81
@@ -38,9 +38,9 @@ public:
 
   //       single pin interface
   //       mode = INPUT, OUTPUT or INPUT_PULLUP (==INPUT)
-  bool     pinMode(uint8_t pin, uint8_t mode);
-  bool     digitalWrite(uint8_t pin, uint8_t value);
-  uint8_t  digitalRead(uint8_t pin);
+  bool     pinMode1(uint8_t pin, uint8_t mode);
+  bool     write1(uint8_t pin, uint8_t value);
+  uint8_t  read1(uint8_t pin);
 
   bool     setPolarity(uint8_t pin, bool reversed);
   bool     getPolarity(uint8_t pin, bool &reversed);
diff --git a/libraries/MCP23017_RT/README.md b/libraries/MCP23017_RT/README.md
index 162aa905..cef690c0 100644
--- a/libraries/MCP23017_RT/README.md
+++ b/libraries/MCP23017_RT/README.md
@@ -21,7 +21,7 @@ This library gives easy control over the 16 pins of a (I2C) MCP23017 chip.
 This IC is strongly related tot the MCP23S17 SPI port expander - https://github.com/RobTillaart/MCP23S17
 Programming Interface is kept the same as much as possible.
 
-Since 0.3.1 the **digitalWrite(pin, value)** is optimized. 
+The **write1(pin, value)** is optimized. 
 If a pin is not changed it will not be written again to save time.
 
 
@@ -49,6 +49,28 @@ However low prio.
 Note that the MCP23S017 (SPI version) does not have this "feature" for GPA7 and GPB7.
 
 
+#### 0.6.0 Breaking change
+
+The version 0.6.0 has breaking changes in the interface. 
+The rationale is that the programming environment of the **Arduino ESP32 S3** 
+board uses a remapping by means of the include file **io_pin_remap.h**.
+This file remaps the pins of several core Arduino functions. 
+The remapping is implemented by #define macros and these implement "hard" text 
+replacements without considering context. 
+The effect is that methods from this class (and several others) which have the same 
+name as those Arduino core functions will be remapped into something not working.
+
+The following library functions have been renamed:
+
+|  old name        |  new name    |  notes  |
+|:-----------------|:-------------|:--------|
+|  analogRead()    |  read()      |
+|  analogWrite()   |  write()     |
+|  pinMode()       |  pinMode1()  |
+|  digitalRead()   |  read1()     |
+|  digitalWrite()  |  write1()    |
+
+
 #### 0.5.0 Breaking change
 
 Version 0.5.0 introduced a breaking change.
@@ -102,9 +124,9 @@ Can be overruled with Wire0..WireN.
 
 Please note REVD remarks at top.
 
-- **bool pinMode(uint8_t pin, uint8_t mode)** pin = 0..15, mode = INPUT, OUTPUT. Returns true if successful.
-- **bool digitalWrite(uint8_t pin, uint8_t value)** pin = 0..15, value = LOW(0) HIGH (!0). Returns true if successful.
-- **uint8_t digitalRead(uint8_t pin)** pin = 0..15, returns LOW or HIGH, might set the lastError();
+- **bool pinMode1(uint8_t pin, uint8_t mode)** pin = 0..15, mode = INPUT, OUTPUT. Returns true if successful.
+- **bool write1(uint8_t pin, uint8_t value)** pin = 0..15, value = LOW(0) HIGH (!0). Returns true if successful.
+- **uint8_t read1(uint8_t pin)** pin = 0..15, returns LOW or HIGH, might set the lastError();
 - **bool setPolarity(uint8_t pin, bool reversed)** pin = 0..15, set reversed flag. Returns true if successful.
 - **bool getPolarity(uint8_t pin, bool &reversed)** pin = 0..15, reads reversed flag. Returns true if successful.
 - **bool setPullup(uint8_t pin, bool pullup)** pin = 0..15, set pull-up flag. Returns true if successful.
diff --git a/libraries/MCP23017_RT/examples/MCP23017_digitalRead/MCP23017_digitalRead.ino b/libraries/MCP23017_RT/examples/MCP23017_digitalRead/MCP23017_digitalRead.ino
index 354f9291..4008319c 100644
--- a/libraries/MCP23017_RT/examples/MCP23017_digitalRead/MCP23017_digitalRead.ino
+++ b/libraries/MCP23017_RT/examples/MCP23017_digitalRead/MCP23017_digitalRead.ino
@@ -15,7 +15,7 @@ void setup()
 {
   Serial.begin(230400);
   Serial.println(__FILE__);
-  Serial.print("MCP23017_test version: ");
+  Serial.print("MCP23017_LIB_VERSION: ");
   Serial.println(MCP23017_LIB_VERSION);
 
   Wire.begin();
@@ -24,10 +24,10 @@ void setup()
   MCP.pinMode8(0, 0x00);   //  CHECK
   MCP.pinMode8(1, 0x00);
 
-  Serial.println("TEST digitalRead(pin)");
+  Serial.println("TEST read1(pin)");
   for (int pin = 0; pin < 16; pin++)
   {
-    int val = MCP.digitalRead(pin);
+    int val = MCP.read1(pin);
     Serial.print(val);
     Serial.print('\t');
   }
diff --git a/libraries/MCP23017_RT/examples/MCP23017_digitalWrite/MCP23017_digitalWrite.ino b/libraries/MCP23017_RT/examples/MCP23017_digitalWrite/MCP23017_digitalWrite.ino
index 1dd6064b..16cf490c 100644
--- a/libraries/MCP23017_RT/examples/MCP23017_digitalWrite/MCP23017_digitalWrite.ino
+++ b/libraries/MCP23017_RT/examples/MCP23017_digitalWrite/MCP23017_digitalWrite.ino
@@ -16,7 +16,7 @@ void setup()
 {
   Serial.begin(230400);
   Serial.println(__FILE__);
-  Serial.print("MCP23017_test version: ");
+  Serial.print("MCP23017_LIB_VERSION: ");
   Serial.println(MCP23017_LIB_VERSION);
 
   Wire.begin();
@@ -27,10 +27,10 @@ void setup()
   MCP.pinMode8(1, 0x00);
   Wire.setClock(50);
 
-  Serial.println("TEST digitalWrite(0)");
+  Serial.println("TEST write1(0)");
   for (int i = 0; i < 16; i++)
   {
-    MCP.digitalWrite(0, i % 2);  //  alternating HIGH/LOW
+    MCP.write1(0, i % 2);  //  alternating HIGH/LOW
     Serial.print(i % 2);
     Serial.print('\t');
     delay(250);
@@ -38,10 +38,10 @@ void setup()
   Serial.println();
   Serial.println();
 
-  Serial.println("TEST digitalWrite(pin)");
+  Serial.println("TEST write1(pin)");
   for (int pin = 0; pin < 16; pin++)
   {
-    MCP.digitalWrite(pin, 1 - pin % 2);  //  alternating HIGH/LOW
+    MCP.write1(pin, 1 - pin % 2);  //  alternating HIGH/LOW
     Serial.print(1 - pin % 2);
     Serial.print('\t');
   }
@@ -52,7 +52,7 @@ void setup()
 
   for (int pin = 0; pin < 16; pin++)
   {
-    int val = MCP.digitalRead(pin);
+    int val = MCP.read1(pin);
     Serial.print(val);
     Serial.print('\t');
   }
diff --git a/libraries/MCP23017_RT/examples/MCP23017_performance/MCP23017_performance.ino b/libraries/MCP23017_RT/examples/MCP23017_performance/MCP23017_performance.ino
index 0ff7f829..8d5c438b 100644
--- a/libraries/MCP23017_RT/examples/MCP23017_performance/MCP23017_performance.ino
+++ b/libraries/MCP23017_RT/examples/MCP23017_performance/MCP23017_performance.ino
@@ -35,35 +35,35 @@ void setup()
   delay(100);
 
 
-  Serial.print("TEST digitalWrite(0, value):\t");
+  Serial.print("TEST write1(0, value):\t");
   delay(100);
   start = micros();
   for (int i = 0; i < 16; i++)
   {
-    MCP.digitalWrite(0, i & 0x01);  //  alternating HIGH/LOW
+    MCP.write1(0, i & 0x01);  //  alternating HIGH/LOW
   }
   stop = micros();
   Serial.println((stop - start) / 16.0);
 
 
-  Serial.print("TEST digitalWrite(pin, value):\t");
+  Serial.print("TEST write1(pin, value):\t");
   delay(100);
   start = micros();
   for (int pin = 0; pin < 16; pin++)
   {
-    MCP.digitalWrite(pin, 1 - pin % 2);  //  alternating HIGH/LOW
+    MCP.write1(pin, 1 - pin % 2);  //  alternating HIGH/LOW
   }
   stop = micros();
   Serial.println((stop - start) / 16.0);
 
 
-  Serial.print("TEST digitalRead(pin):\t");
+  Serial.print("TEST read1(pin):\t");
   delay(100);
   start = micros();
   volatile int val = 0;
   for (int pin = 0; pin < 16; pin++)
   {
-    val = MCP.digitalRead(pin);
+    val = MCP.read1(pin);
   }
   stop = micros();
   Serial.println((stop - start) / 16.0);
diff --git a/libraries/MCP23017_RT/examples/MCP23017_test/MCP23017_test.ino b/libraries/MCP23017_RT/examples/MCP23017_test/MCP23017_test.ino
index 052a5ea3..638d4c81 100644
--- a/libraries/MCP23017_RT/examples/MCP23017_test/MCP23017_test.ino
+++ b/libraries/MCP23017_RT/examples/MCP23017_test/MCP23017_test.ino
@@ -33,7 +33,7 @@ void setup()
   //
   //  test 8 bit interface
   //
-  Serial.println("TEST digitalWrite8(port, value)");
+  Serial.println("TEST write8(port, value) + read8(port)");
   for (uint16_t i = 0; i < 256; i++)
   {
     MCP.write8(0, i);
diff --git a/libraries/MCP23017_RT/keywords.txt b/libraries/MCP23017_RT/keywords.txt
index 0836bf86..bf954e57 100644
--- a/libraries/MCP23017_RT/keywords.txt
+++ b/libraries/MCP23017_RT/keywords.txt
@@ -9,9 +9,9 @@ begin	KEYWORD2
 isConnected	KEYWORD2
 getAddress	KEYWORD2
 
-pinMode	KEYWORD2
-digitalWrite	KEYWORD2
-digitalRead	KEYWORD2
+pinMode1	KEYWORD2
+write1	KEYWORD2
+read1	KEYWORD2
 
 setPolarity	KEYWORD2
 getPolarity	KEYWORD2
diff --git a/libraries/MCP23017_RT/library.json b/libraries/MCP23017_RT/library.json
index b0e21eef..fd0d1789 100644
--- a/libraries/MCP23017_RT/library.json
+++ b/libraries/MCP23017_RT/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/MCP23017_RT.git"
   },
-  "version": "0.5.0",
+  "version": "0.6.0",
   "license": "MIT",
   "frameworks": "*",
   "platforms": "*",
diff --git a/libraries/MCP23017_RT/library.properties b/libraries/MCP23017_RT/library.properties
index 19906c65..0604da4b 100644
--- a/libraries/MCP23017_RT/library.properties
+++ b/libraries/MCP23017_RT/library.properties
@@ -1,5 +1,5 @@
 name=MCP23017_RT
-version=0.5.0
+version=0.6.0
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library for I2C MCP23017 16 channel port expander  16 IO-lines
diff --git a/libraries/MCP23017_RT/test/unit_test_001.cpp b/libraries/MCP23017_RT/test/unit_test_001.cpp
index 3f400cd9..f91a1b9e 100644
--- a/libraries/MCP23017_RT/test/unit_test_001.cpp
+++ b/libraries/MCP23017_RT/test/unit_test_001.cpp
@@ -85,21 +85,21 @@ unittest(test_lastError)
   assertEqual(MCP23017_OK, MCP.lastError());
 
   // MCP23017_PIN_ERROR
-  MCP.pinMode(16, INPUT);
+  MCP.pinMode1(16, INPUT);
   assertEqual(MCP23017_PIN_ERROR, MCP.lastError());
   assertEqual(MCP23017_OK, MCP.lastError());
 
-  MCP.digitalWrite(16, 1);
+  MCP.write1(16, 1);
   assertEqual(MCP23017_PIN_ERROR, MCP.lastError());
   assertEqual(MCP23017_OK, MCP.lastError());
 
-  uint8_t y = MCP.digitalRead(16);
+  uint8_t y = MCP.read1(16);
   assertEqual(MCP23017_PIN_ERROR, MCP.lastError());
   assertEqual(MCP23017_OK, MCP.lastError());
 
 
   // MCP23017_VALUE_ERROR  - 3 is not INPUT, INPUT_PULLUP, OUTPUT)
-  MCP.pinMode(0, 3);
+  MCP.pinMode1(0, 3);
   assertEqual(MCP23017_VALUE_ERROR, MCP.lastError());
   assertEqual(MCP23017_OK, MCP.lastError());