diff --git a/libraries/MCP_ADC/LICENSE b/libraries/MCP_ADC/LICENSE
index d14c700d..25933a7d 100644
--- a/libraries/MCP_ADC/LICENSE
+++ b/libraries/MCP_ADC/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019-2021 Rob Tillaart
+Copyright (c) 2019-2022 Rob Tillaart
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/libraries/MCP_ADC/MCP_ADC.cpp b/libraries/MCP_ADC/MCP_ADC.cpp
index 81f14f3c..3e99438c 100644
--- a/libraries/MCP_ADC/MCP_ADC.cpp
+++ b/libraries/MCP_ADC/MCP_ADC.cpp
@@ -1,11 +1,10 @@
 //
 //    FILE: MCP_ADC.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.7
+// VERSION: 0.1.8
 //    DATE: 2019-10-24
 // PURPOSE: Arduino library for MCP3002, MCP3004, MCP3008, MCP3202, MCP3204, MCP3208
 //     URL: https://github.com/RobTillaart/MCP_ADC
-//
 
 
 #include "MCP_ADC.h"
@@ -304,3 +303,4 @@ uint8_t MCP3208::buildRequest(uint8_t channel, bool single, uint8_t * data)
 
 
 // -- END OF FILE --
+
diff --git a/libraries/MCP_ADC/MCP_ADC.h b/libraries/MCP_ADC/MCP_ADC.h
index c5a2b192..15af22c6 100644
--- a/libraries/MCP_ADC/MCP_ADC.h
+++ b/libraries/MCP_ADC/MCP_ADC.h
@@ -2,7 +2,7 @@
 //
 //    FILE: MCP_ADC.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.7
+// VERSION: 0.1.8
 //    DATE: 2019-10-24
 // PURPOSE: Arduino library for MCP_ADC
 //     URL: https://github.com/RobTillaart/MCP_ADC
@@ -13,7 +13,7 @@
 #include "SPI.h"
 
 
-#define MCP_ADC_LIB_VERSION       (F("0.1.7"))
+#define MCP_ADC_LIB_VERSION       (F("0.1.8"))
 
 
 class MCP_ADC
diff --git a/libraries/MCP_ADC/README.md b/libraries/MCP_ADC/README.md
index eb146344..c9347a6b 100644
--- a/libraries/MCP_ADC/README.md
+++ b/libraries/MCP_ADC/README.md
@@ -120,30 +120,35 @@ The default SPI speed is reduced to 1 MHz.
 This is the value recommended in the datasheet for 2.7V.
 
 In a test with an ESP32 (3.3V) the library showed stable results 
-at 4 Mhz and at 6 Mhz it was almost good.
+at 4 MHz and at 6 MHz it was almost good.
  
 The max value read at 6 MHz was 1020 instead of 1023  (MCP3008) 
 which indicates that the last 2 bits got lost due to signal deformation.
 
 | Board | Voltage |  safe  |  max  |
 |:-----:|:-------:|:------:|:-----:|
-| ESP32 |  2.7V   |  1 MHz | 4 Mhz |
-| UNO   |  5.0V   |  2 MHz | 4 Mhz |
+| ESP32 |  2.7V   |  1 MHz | 4 MHz |
+| UNO   |  5.0V   |  2 MHz | 4 MHz |
 
 
 For hardware SPI the ESP32 uses the VSPI pins. (see ESP examples).
 
 
-## Future / ideas / improvements
+## Future
 
+- documentation
 - testing, a lot ...
-- get / setF(float A, float B) => float readF(channel)   output = A\*value + B;
-  it actually does float mapping. As it implies the same mapping for all it might 
-  not be that useful
 - analogRead (mask, int array\[8\] ) read ports (set in mask) in an array in one call.
   would this save time?
 
 
+#### wont
+
+- get / setF(float A, float B) => float readF(channel)   output = A\*value + B;
+  it actually does float mapping. As it implies the same mapping for all it might 
+  not be that useful => multmap
+  
+
 ## Operations
 
 See examples.
diff --git a/libraries/MCP_ADC/examples/MCP3002_analogRead/MCP3002_analogRead.ino b/libraries/MCP_ADC/examples/MCP3002_analogRead/MCP3002_analogRead.ino
index 67b431fe..cc6a45a9 100644
--- a/libraries/MCP_ADC/examples/MCP3002_analogRead/MCP3002_analogRead.ino
+++ b/libraries/MCP_ADC/examples/MCP3002_analogRead/MCP3002_analogRead.ino
@@ -1,15 +1,16 @@
 //
 //    FILE: MCP3002_analogRead.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.1
 // PURPOSE: demo
 //    DATE: 2020-08-13
 
+
 #include "MCP_ADC.h"
 
 MCP3002 mcp1;       // use HWSPI
 MCP3002 mcp2(6, 7); // use SWSPI
 
+
 void setup()
 {
   Serial.begin(115200);
@@ -30,6 +31,7 @@ void setup()
   Serial.println(mcp2.maxValue());
 }
 
+
 void loop()
 {
   Serial.print("mcp1:\t");
@@ -52,4 +54,6 @@ void loop()
   delay(1000);
 }
 
+
 // -- END OF FILE --
+
diff --git a/libraries/MCP_ADC/examples/MCP3002_deltaRead/MCP3002_deltaRead.ino b/libraries/MCP_ADC/examples/MCP3002_deltaRead/MCP3002_deltaRead.ino
index 5f72b5cc..9b66cda9 100644
--- a/libraries/MCP_ADC/examples/MCP3002_deltaRead/MCP3002_deltaRead.ino
+++ b/libraries/MCP_ADC/examples/MCP3002_deltaRead/MCP3002_deltaRead.ino
@@ -1,15 +1,16 @@
 //
 //    FILE: MCP3002_deltaRead.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.1
 // PURPOSE: demo
 //    DATE: 2020-08-13
 
+
 #include "MCP_ADC.h"
 
 MCP3002 mcp1;       // use HWSPI
 MCP3002 mcp2(6, 7); // use SWSPI
 
+
 void setup()
 {
   Serial.begin(115200);
@@ -30,6 +31,7 @@ void setup()
   Serial.println(mcp2.maxValue());
 }
 
+
 void loop()
 {
   Serial.print("mcp1:\t");
@@ -52,4 +54,6 @@ void loop()
   delay(1000);
 }
 
+
 // -- END OF FILE --
+
diff --git a/libraries/MCP_ADC/examples/MCP3002_differentialRead/MCP3002_differentialRead.ino b/libraries/MCP_ADC/examples/MCP3002_differentialRead/MCP3002_differentialRead.ino
index 599cfa7e..58381e00 100644
--- a/libraries/MCP_ADC/examples/MCP3002_differentialRead/MCP3002_differentialRead.ino
+++ b/libraries/MCP_ADC/examples/MCP3002_differentialRead/MCP3002_differentialRead.ino
@@ -1,15 +1,16 @@
 //
 //    FILE: MCP3002_differentialRead.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.1
 // PURPOSE: demo
 //    DATE: 2020-08-13
 
+
 #include "MCP_ADC.h"
 
 MCP3002 mcp1;       // use HWSPI
 MCP3002 mcp2(6, 7); // use SWSPI
 
+
 void setup()
 {
   Serial.begin(115200);
@@ -30,6 +31,7 @@ void setup()
   Serial.println(mcp2.maxValue());
 }
 
+
 void loop()
 {
   Serial.print("mcp1:\t");
@@ -52,4 +54,6 @@ void loop()
   delay(1000);
 }
 
+
 // -- END OF FILE --
+
diff --git a/libraries/MCP_ADC/examples/MCP3008_analogRead/MCP3008_analogRead.ino b/libraries/MCP_ADC/examples/MCP3008_analogRead/MCP3008_analogRead.ino
index 35cc7ef8..323fdb24 100644
--- a/libraries/MCP_ADC/examples/MCP3008_analogRead/MCP3008_analogRead.ino
+++ b/libraries/MCP_ADC/examples/MCP3008_analogRead/MCP3008_analogRead.ino
@@ -1,15 +1,16 @@
 //
 //    FILE: MCP3008_analogRead.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.1
 // PURPOSE: demo
 //    DATE: 2020-08-13
 
+
 #include "MCP_ADC.h"
 
 MCP3008 mcp1;       // use HWSPI
 MCP3004 mcp2(6, 7); // use SWSPI
 
+
 void setup()
 {
   Serial.begin(115200);
@@ -30,6 +31,7 @@ void setup()
   Serial.println(mcp2.maxValue());
 }
 
+
 void loop()
 {
   Serial.print("mcp1:\t");
@@ -52,4 +54,6 @@ void loop()
   delay(1000);
 }
 
+
 // -- END OF FILE --
+
diff --git a/libraries/MCP_ADC/examples/MCP3008_analogRead_ESP32_HWSPI/MCP3008_analogRead_ESP32_HWSPI.ino b/libraries/MCP_ADC/examples/MCP3008_analogRead_ESP32_HWSPI/MCP3008_analogRead_ESP32_HWSPI.ino
index 5bb138e3..7251a02d 100644
--- a/libraries/MCP_ADC/examples/MCP3008_analogRead_ESP32_HWSPI/MCP3008_analogRead_ESP32_HWSPI.ino
+++ b/libraries/MCP_ADC/examples/MCP3008_analogRead_ESP32_HWSPI/MCP3008_analogRead_ESP32_HWSPI.ino
@@ -1,23 +1,23 @@
 //
 //    FILE: MCP3008_analogRead_ESP32_HWSPI.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.0
 // PURPOSE: demo
 //    DATE: 2021-03-12
 
+
 #include "MCP_ADC.h"
 
 
 // ESP32 PINS
 // For HSPI
-// CLK:  14
-// MOSI: 13
-// MISO: 12
+//   CLK:  14
+//   MOSI: 13
+//   MISO: 12
 //
 // For VSPI (id = 2):
-// CLK: 18,
-// MOSI: 23,
-// MISO: 19,
+//   CLK:  18,
+//   MOSI: 23,
+//   MISO: 19,
 
 
 MCP3008 mcp1;                  // use HWSPI  on ESP32 (apparently VSPI)
@@ -42,6 +42,7 @@ void setup()
   mcp1.setSPIspeed(4000000);  // seems to be the max speed. use 1MHz (default) to be safe
 }
 
+
 void loop()
 {
   Serial.print(millis());
@@ -58,4 +59,6 @@ void loop()
   delay(1000);
 }
 
+
 // -- END OF FILE --
+
diff --git a/libraries/MCP_ADC/examples/MCP3008_analogRead_ESP32_SWSPI/MCP3008_analogRead_ESP32_SWSPI.ino b/libraries/MCP_ADC/examples/MCP3008_analogRead_ESP32_SWSPI/MCP3008_analogRead_ESP32_SWSPI.ino
index 388e6f77..edd83f36 100644
--- a/libraries/MCP_ADC/examples/MCP3008_analogRead_ESP32_SWSPI/MCP3008_analogRead_ESP32_SWSPI.ino
+++ b/libraries/MCP_ADC/examples/MCP3008_analogRead_ESP32_SWSPI/MCP3008_analogRead_ESP32_SWSPI.ino
@@ -1,23 +1,23 @@
 //
 //    FILE: MCP3008_analogRead_ESP32_SWSPI.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.0
 // PURPOSE: demo
 //    DATE: 2021-03-12
 
+
 #include "MCP_ADC.h"
 
 
 // ESP32 PINS
 // For HSPI
-// CLK:  14
-// MOSI: 13
-// MISO: 12
+//   CLK:  14
+//   MOSI: 13
+//   MISO: 12
 //
 // For VSPI (id = 2):
-// CLK: 18,
-// MOSI: 23,
-// MISO: 19,
+//   CLK:  18,
+//   MOSI: 23,
+//   MISO: 19,
 
 
 MCP3008 mcp1(23, 19, 21);      // ESP32 use SWSPI  dataIn, dataOut, Clock
@@ -40,6 +40,7 @@ void setup()
   Serial.println(mcp1.maxValue());
 }
 
+
 void loop()
 {
   Serial.print(millis());
@@ -56,4 +57,6 @@ void loop()
   delay(1000);
 }
 
+
 // -- END OF FILE --
+
diff --git a/libraries/MCP_ADC/examples/MCP3008_deltaRead/MCP3008_deltaRead.ino b/libraries/MCP_ADC/examples/MCP3008_deltaRead/MCP3008_deltaRead.ino
index 705ed2a9..8e052338 100644
--- a/libraries/MCP_ADC/examples/MCP3008_deltaRead/MCP3008_deltaRead.ino
+++ b/libraries/MCP_ADC/examples/MCP3008_deltaRead/MCP3008_deltaRead.ino
@@ -1,15 +1,16 @@
 //
 //    FILE: MCP3008_deltaRead.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.1
 // PURPOSE: demo
 //    DATE: 2020-08-13
 
+
 #include "MCP_ADC.h"
 
 MCP3008 mcp1;       // use HWSPI
 MCP3004 mcp2(6, 7); // use SWSPI
 
+
 void setup()
 {
   Serial.begin(115200);
@@ -30,6 +31,7 @@ void setup()
   Serial.println(mcp2.maxValue());
 }
 
+
 void loop()
 {
   Serial.print("mcp1:\t");
@@ -52,4 +54,6 @@ void loop()
   delay(1000);
 }
 
+
 // -- END OF FILE --
+
diff --git a/libraries/MCP_ADC/examples/MCP3008_differentialRead/MCP3008_differentialRead.ino b/libraries/MCP_ADC/examples/MCP3008_differentialRead/MCP3008_differentialRead.ino
index aec4b2f2..e7d06e66 100644
--- a/libraries/MCP_ADC/examples/MCP3008_differentialRead/MCP3008_differentialRead.ino
+++ b/libraries/MCP_ADC/examples/MCP3008_differentialRead/MCP3008_differentialRead.ino
@@ -1,15 +1,16 @@
 //
 //    FILE: MCP3008_differentialRead.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.1
 // PURPOSE: demo
 //    DATE: 2020-08-13
 
+
 #include "MCP_ADC.h"
 
 MCP3008 mcp1;       // use HWSPI
 MCP3004 mcp2(6, 7); // use SWSPI
 
+
 void setup()
 {
   Serial.begin(115200);
@@ -30,6 +31,7 @@ void setup()
   Serial.println(mcp2.maxValue());
 }
 
+
 void loop()
 {
   Serial.print("mcp1:\t");
@@ -52,4 +54,6 @@ void loop()
   delay(1000);
 }
 
+
 // -- END OF FILE --
+
diff --git a/libraries/MCP_ADC/examples/MCP_ADC_performance/MCP_ADC_performance.ino b/libraries/MCP_ADC/examples/MCP_ADC_performance/MCP_ADC_performance.ino
index 7d6b2744..6924f6a5 100644
--- a/libraries/MCP_ADC/examples/MCP_ADC_performance/MCP_ADC_performance.ino
+++ b/libraries/MCP_ADC/examples/MCP_ADC_performance/MCP_ADC_performance.ino
@@ -1,13 +1,12 @@
 //
 //    FILE: MCP_ADC_performance.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.1
 // PURPOSE: simple performance measurement.
 //    DATE: 2020-08-14
-
-// Note the deltaRead() does 1 or 2 differential reads depending
-// on positive of negative delta between 2 pins.
-// Therefor timing might differ substantially.
+//
+//  Note the deltaRead() does 1 or 2 differential reads depending
+//  on positive of negative delta between 2 pins.
+//  Therefore timing might differ substantially.
 
 
 #include "MCP_ADC.h"
@@ -22,6 +21,7 @@ MCP3208 mcp28;
 
 uint32_t start, stop;
 
+
 void setup()
 {
   Serial.begin(115200);
@@ -93,10 +93,12 @@ void setup()
   Serial.println("done...");
 }
 
+
 void loop()
 {
 }
 
+
 void test_1()
 {
   uint32_t val = 0;
@@ -133,6 +135,7 @@ void test_1()
   delay(10);
 }
 
+
 void test_2()
 {
   uint32_t val = 0;
@@ -169,6 +172,7 @@ void test_2()
   delay(10);
 }
 
+
 void test_3()
 {
   uint32_t val = 0;
@@ -205,6 +209,7 @@ void test_3()
   delay(10);
 }
 
+
 void test_6()
 {
   uint32_t val = 0;
@@ -243,3 +248,4 @@ void test_6()
 
 
 // -- END OF FILE --
+
diff --git a/libraries/MCP_ADC/library.json b/libraries/MCP_ADC/library.json
index 118a0d8c..9fec9834 100644
--- a/libraries/MCP_ADC/library.json
+++ b/libraries/MCP_ADC/library.json
@@ -15,8 +15,9 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/MCP_ADC.git"
   },
-  "version": "0.1.7",
+  "version": "0.1.8",
   "license": "MIT",
   "frameworks": "*",
-  "platforms": "*"
+  "platforms": "*",
+  "headers": "MCP_ADC.h"
 }
diff --git a/libraries/MCP_ADC/library.properties b/libraries/MCP_ADC/library.properties
index 5abc2ff6..56d33201 100644
--- a/libraries/MCP_ADC/library.properties
+++ b/libraries/MCP_ADC/library.properties
@@ -1,5 +1,5 @@
 name=MCP_ADC
-version=0.1.7
+version=0.1.8
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library for MCP3002, MCP3004, MCP3008, MCP3202, MCP3204, MCP3208
diff --git a/libraries/MCP_ADC/test/unit_test_001.cpp b/libraries/MCP_ADC/test/unit_test_001.cpp
index 2bfcd913..bc48d162 100644
--- a/libraries/MCP_ADC/test/unit_test_001.cpp
+++ b/libraries/MCP_ADC/test/unit_test_001.cpp
@@ -38,12 +38,15 @@
 
 unittest_setup()
 {
+  fprintf(stderr, "MCP_ADC_LIB_VERSION: %s\n", (char *) MCP_ADC_LIB_VERSION);
 }
 
+
 unittest_teardown()
 {
 }
 
+
 /*
 unittest(test_new_operator)
 {
@@ -59,8 +62,6 @@ unittest(test_new_operator)
 
 unittest(test_constructor)
 {
-  fprintf(stderr, "VERSION: %s\n", "-");
-
   MCP3002 ADC2;
   MCP3004 ADC4;
   MCP3008 ADC8;
@@ -90,6 +91,7 @@ unittest(test_constructor)
   assertEqual(4095, ADC28.maxValue());
 }
 
+
 unittest(test_MCP3002)
 {
   MCP3002 mcp_adc;
@@ -113,6 +115,8 @@ unittest(test_MCP3002)
 
 }
 
+
 unittest_main()
 
+
 // --------