diff --git a/libraries/PCA9634/PCA9634.cpp b/libraries/PCA9634/PCA9634.cpp
index f262be40..c60319f6 100644
--- a/libraries/PCA9634/PCA9634.cpp
+++ b/libraries/PCA9634/PCA9634.cpp
@@ -2,13 +2,14 @@
 //    FILE: PCA9634.cpp
 //  AUTHOR: Rob Tillaart
 //    DATE: 03-01-2022
-// VERSION: 0.1.1
+// VERSION: 0.1.2
 // PURPOSE: Arduino library for PCA9634 I2C LED driver
 //     URL: https://github.com/RobTillaart/PCA9634
 //
 //  HISTORY:
 //  0.1.0   2022-01-03  initial version -- based upon 0.3.2 PCA9635
 //  0.1.1   2022-01-04  minor fixes 
+//  0.1.2   2022-04-13  issue #7 add constants and functions for mode registers.
 
 
 #include "PCA9634.h"
@@ -64,7 +65,9 @@ void PCA9634::reset()
 {
   _data = 0;
   _error = 0;
-  writeReg(PCA9634_MODE1, 0x81);  //  AUTOINCR | NOSLEEP | ALLADRR
+
+  uint8_t mode1_mask = PCA9634_MODE1_AUTOINCR2 | PCA9634_MODE1_ALLCALL;
+  writeReg(PCA9634_MODE1, mode1_mask);  //  AUTOINCR | NOSLEEP | ALLADRR  0x81
 }
 
 
diff --git a/libraries/PCA9634/PCA9634.h b/libraries/PCA9634/PCA9634.h
index 1b6a21b7..c059e5cd 100644
--- a/libraries/PCA9634/PCA9634.h
+++ b/libraries/PCA9634/PCA9634.h
@@ -3,7 +3,7 @@
 //    FILE: PCA9634.h
 //  AUTHOR: Rob Tillaart
 //    DATE: 03-01-2022
-// VERSION: 0.1.1
+// VERSION: 0.1.2
 // PURPOSE: Arduino library for PCA9634 I2C LED driver, 8 channel
 //     URL: https://github.com/RobTillaart/PCA9634
 
@@ -12,11 +12,14 @@
 #include "Wire.h"
 
 
-#define PCA9634_LIB_VERSION         (F("0.1.1"))
+#define PCA9634_LIB_VERSION         (F("0.1.2"))
 
 #define PCA9634_MODE1               0x00
 #define PCA9634_MODE2               0x01
-#define PCA9634_PWM(x)              (0x82+(x))    // Auto-Increment for all registers.
+
+//  0x80 bit ==> Auto-Increment for all registers.
+//               used in writeN() - see issue #9
+#define PCA9634_PWM(x)              (0x82+(x))
 
 #define PCA9634_GRPPWM              0x0A
 #define PCA9634_GRPFREQ             0x0B
@@ -37,6 +40,24 @@
 #define PCA9634_ERR_REG             0xFB
 #define PCA9634_ERR_I2C             0xFA
 
+
+// Configuration bits MODE1 register
+#define PCA9634_MODE1_AUTOINCR2     0x80  // RO, 0 = disable  1 = enable
+#define PCA9634_MODE1_AUTOINCR1     0x40  // RO, bit1
+#define PCA9634_MODE1_AUTOINCR0     0x20  // RO  bit0
+#define PCA9634_MODE1_SLEEP         0x10  // 0 = normal       1 = sleep
+#define PCA9634_MODE1_SUB1          0x08  // 0 = disable      1 = enable
+#define PCA9634_MODE1_SUB2          0x04  // 0 = disable      1 = enable
+#define PCA9634_MODE1_SUB3          0x02  // 0 = disable      1 = enable
+#define PCA9634_MODE1_ALLCALL       0x01  // 0 = disable      1 = enable
+
+// Configuration bits MODE2 register
+#define PCA9634_MODE2_BLINK         0x20  // 0 = dim          1 = blink
+#define PCA9634_MODE2_INVERT        0x10  // 0 = normal       1 = inverted
+#define PCA9634_MODE2_STOP          0x08  // 0 = on STOP      1 = on ACK
+#define PCA9634_MODE2_TOTEMPOLE     0x04  // 0 = open drain   1 = totem-pole
+
+
 // NOT IMPLEMENTED YET
 #define PCA9634_SUBADR(x)           (0x0E +(x))  // x = 1..3
 #define PCA9634_ALLCALLADR          0x11
@@ -71,6 +92,12 @@ public:
   // reg = 1, 2  check datasheet for values
   uint8_t  writeMode(uint8_t reg, uint8_t value);
   uint8_t  readMode(uint8_t reg);
+  //  convenience wrappers
+  uint8_t  setMode1(uint8_t value) { return writeMode(PCA9634_MODE1, value); };
+  uint8_t  setMode2(uint8_t value) { return writeMode(PCA9634_MODE2, value); };
+  uint8_t  getMode1()              { return readMode(PCA9634_MODE1); };
+  uint8_t  getMode2()              { return readMode(PCA9634_MODE2); };
+
 
   // TODO PWM also in %% ?
   void     setGroupPWM(uint8_t value) { writeReg(PCA9634_GRPPWM, value); }
diff --git a/libraries/PCA9634/README.md b/libraries/PCA9634/README.md
index f64401be..872572bf 100644
--- a/libraries/PCA9634/README.md
+++ b/libraries/PCA9634/README.md
@@ -36,6 +36,7 @@ multiple Wire instances (yet).
 - **bool isConnected()** checks if address is available on I2C bus.
 - **uint8_t channelCount()** returns the number of channels = 8.
 
+
 ### LedDriverMode
 
 - **uint8_t setLedDriverMode(uint8_t channel, uint8_t mode)** mode is 0..3 See datasheet for full details.
@@ -60,10 +61,57 @@ typical use is to write R, G, B values for a full colour LED.
 - **uint8_t writeN(uint8_t channel, uint8_t \* array, uint8_t count)** write count consecutive PWM registers. 
 May return **PCA9634_ERR_WRITE** if array has too many elements 
 (including channel as offset).
+
+
+### Mode registers
+
 - **uint8_t writeMode(uint8_t reg, uint8_t value)** configuration of one of the two configuration registers.
 check datasheet for details.
 - **uint8_t readMode(uint8_t reg)** reads back the configured mode, 
 useful to add or remove a single flag (bit masking).
+- **uint8_t  setMode1(uint8_t value)** convenience wrapper.
+- **uint8_t  setMode2(uint8_t value)** convenience wrapper.
+- **uint8_t  getMode1()** convenience wrapper.
+- **uint8_t  getMode2()** convenience wrapper.
+
+
+#### Constants for mode registers
+
+(added 0.1.2)
+
+| Name                    | Value | Description                     |
+|:------------------------|:-----:|:--------------------------------|
+| PCA9634_MODE1_AUTOINCR2 | 0x80  | RO, 0 = disable  1 = enable     |
+| PCA9634_MODE1_AUTOINCR1 | 0x40  | RO, bit1                        |
+| PCA9634_MODE1_AUTOINCR0 | 0x20  | RO  bit0                        |
+| PCA9634_MODE1_SLEEP     | 0x10  | 0 = normal       1 = sleep      |
+| PCA9634_MODE1_SUB1      | 0x08  | 0 = disable      1 = enable     |
+| PCA9634_MODE1_SUB2      | 0x04  | 0 = disable      1 = enable     |
+| PCA9634_MODE1_SUB3      | 0x02  | 0 = disable      1 = enable     |
+| PCA9634_MODE1_ALLCALL   | 0x01  | 0 = disable      1 = enable     |
+|                         |       |                                 |
+| PCA9634_MODE2_BLINK     | 0x20  | 0 = dim          1 = blink      |
+| PCA9634_MODE2_INVERT    | 0x10  | 0 = normal       1 = inverted   |
+| PCA9634_MODE2_STOP      | 0x08  | 0 = on STOP      1 = on ACK     |
+| PCA9634_MODE2_TOTEMPOLE | 0x04  | 0 = open drain   1 = totem-pole |
+
+
+These constants makes it easier to set modes without using a non descriptive
+bitmask. The constants can be merged by OR-ing them together, see snippet:
+
+```cpp
+ledArray.writeMode(PCA9634_MODE2, 0b00110100);
+
+// would become
+
+uint8_t mode2_mask = PCA9634_MODE2_BLINK | PCA9634_MODE2_INVERT | PCA9634_MODE2_TOTEMPOLE;
+ledArray.writeMode(PCA9634_MODE2, mode2_mask);
+
+// or even
+
+ledArray.setMode2(PCA9634_MODE2_BLINK | PCA9634_MODE2_INVERT | PCA9634_MODE2_TOTEMPOLE);
+
+```
 
 
 ### Group PWM and frequency
@@ -86,7 +134,7 @@ useful to add or remove a single flag (bit masking).
 | PCA9634_ERR_CHAN  | 0xFD  | Channel out of range
 | PCA9634_ERR_MODE  | 0xFC  | Invalid mode
 | PCA9634_ERR_REG   | 0xFB  | Invalid register
-| PCA9634_ERR_I2C   | 0xFA  | PCA9634 I2C communication error
+| PCA9634_ERR_I2C   | 0xFA  | I2C communication error
 
 
 ## Operation
diff --git a/libraries/PCA9634/examples/PCA9634_test01/PCA9634_test01.ino b/libraries/PCA9634/examples/PCA9634_test01/PCA9634_test01.ino
index 9586c477..f4e53b40 100644
--- a/libraries/PCA9634/examples/PCA9634_test01/PCA9634_test01.ino
+++ b/libraries/PCA9634/examples/PCA9634_test01/PCA9634_test01.ino
@@ -2,7 +2,7 @@
 //    FILE: PCA9634_test01.ino
 //  AUTHOR: Rob Tillaart
 //    DATE: 2022-01-03
-// PUPROSE: test PCA9634 library
+// PURPOSE: test PCA9634 library
 
 
 #include "Arduino.h"
diff --git a/libraries/PCA9634/examples/PCA9634_test_multiple/PCA9634_test_multiple.ino b/libraries/PCA9634/examples/PCA9634_test_multiple/PCA9634_test_multiple.ino
index fd2dd54e..4b3dd337 100644
--- a/libraries/PCA9634/examples/PCA9634_test_multiple/PCA9634_test_multiple.ino
+++ b/libraries/PCA9634/examples/PCA9634_test_multiple/PCA9634_test_multiple.ino
@@ -2,7 +2,7 @@
 //    FILE: PCA9634_test_multiple.ino
 //  AUTHOR: Rob Tillaart
 //    DATE: 2022-01-03
-// PUPROSE: test PCA9634 library
+// PURPOSE: test PCA9634 library
 
 
 #include "Arduino.h"
diff --git a/libraries/PCA9634/keywords.txt b/libraries/PCA9634/keywords.txt
index 4bf1f534..1c7a171f 100644
--- a/libraries/PCA9634/keywords.txt
+++ b/libraries/PCA9634/keywords.txt
@@ -19,6 +19,10 @@ writeN	KEYWORD2
 
 writeMode	KEYWORD2
 readMode	KEYWORD2
+setMode1	KEYWORD2
+setMode2	KEYWORD2
+getMode1	KEYWORD2
+getMode2	KEYWORD2
 
 setGroupPWM	KEYWORD2
 getGroupPWM	KEYWORD2
@@ -36,4 +40,18 @@ PCA9634_ERR_WRITE	LITERAL1
 PCA9634_ERR_CHAN	LITERAL1
 PCA9634_ERR_MODE	LITERAL1
 PCA9634_ERR_REG	LITERAL1
-PCA9634_ERR_I2C	LITERAL1
\ No newline at end of file
+PCA9634_ERR_I2C	LITERAL1
+
+PCA9634_MODE1_AUTOINCR2	LITERAL1
+PCA9634_MODE1_AUTOINCR1	LITERAL1
+PCA9634_MODE1_AUTOINCR0	LITERAL1
+PCA9634_MODE1_SLEEP	LITERAL1
+PCA9634_MODE1_SUB1	LITERAL1
+PCA9634_MODE1_SUB2	LITERAL1
+PCA9634_MODE1_SUB3	LITERAL1
+PCA9634_MODE1_ALLCALL	LITERAL1
+
+PCA9634_MODE2_BLINK	LITERAL1
+PCA9634_MODE2_INVERT	LITERAL1
+PCA9634_MODE2_STOP	LITERAL1
+PCA9634_MODE2_TOTEMPOLE	LITERAL1
diff --git a/libraries/PCA9634/library.json b/libraries/PCA9634/library.json
index cc0dfebf..82771dc6 100644
--- a/libraries/PCA9634/library.json
+++ b/libraries/PCA9634/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/PCA9634.git"
   },
-  "version": "0.1.1",
+  "version": "0.1.2",
   "license": "MIT",
   "frameworks": "arduino",
   "platforms": "*",
diff --git a/libraries/PCA9634/library.properties b/libraries/PCA9634/library.properties
index ae1f7d58..3c90020d 100644
--- a/libraries/PCA9634/library.properties
+++ b/libraries/PCA9634/library.properties
@@ -1,5 +1,5 @@
 name=PCA9634
-version=0.1.1
+version=0.1.2
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library for PCA9634 I2C LED driver 8 channel