diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 6a4c3429e..3f99c2e7b 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -144,6 +144,7 @@ The following binary downloads have been compiled with ESP8266/Arduino library c
 | USE_EXPRESSION        | - | - | - | - | - | - | - | - |
 | SUPPORT_IF_STATEMENT  | - | - | - | - | - | - | - | - |
 |                       |   |   |   |   |   |   |   |   |
+| Feature or Sensor     | minimal | basic | classic | sonoff | knx | sensors | ir | display | Remarks
 | ROTARY_V1             | - | - | - | - | - | - | - | - |
 | USE_SONOFF_RF         | - | - | - | x | x | x | - | - |
 | USE_RF_FLASH          | - | - | - | x | x | x | - | - |
@@ -245,7 +246,9 @@ The following binary downloads have been compiled with ESP8266/Arduino library c
 | USE_RF_SENSOR         | - | - | - | - | - | x | - | - | AlectoV2 only
 | USE_HRE               | - | - | - | - | - | x | - | - |
 | USE_A4988_STEPPER     | - | - | - | - | - | - | - | - |
+| USE_ARDUINO_SLAVE     | - | - | - | - | - | - | - | - |
 |                       |   |   |   |   |   |   |   |   |
+| Feature or Sensor     | minimal | basic | classic | sonoff | knx | sensors | ir | display | Remarks
 | USE_DISPLAY           | - | - | - | - | - | - | - | x |
 | USE_DISPLAY_LCD       | - | - | - | - | - | - | - | x |
 | USE_DISPLAY_SSD1306   | - | - | - | - | - | - | - | x |
diff --git a/sonoff/sonoff_post.h b/sonoff/sonoff_post.h
index 7cb08a27a..6e2bd7390 100644
--- a/sonoff/sonoff_post.h
+++ b/sonoff/sonoff_post.h
@@ -212,6 +212,7 @@ char* ToHex_P(const unsigned char * in, size_t insz, char * out, size_t outsz, c
   #define USE_ALECTO_V2                          // Add support for decoding Alecto V2 sensors like ACH2010, WS3000 and DKW2012 using 868MHz RF sensor receiver (+1k7 code)
 #define USE_HRE                                  // Add support for Badger HR-E Water Meter (+1k4 code)
 //#define USE_A4988_STEPPER                        // Add support for A4988/DRV8825 stepper-motor-driver-circuit (+10k5 code)
+//#define USE_ARDUINO_SLAVE                        // Add support for Arduino Uno/Pro Mini via serial interface including flashing (+2k3 code, 44 mem)
 #undef DEBUG_THEO                                // Disable debug code
 #undef USE_DEBUG_DRIVER                          // Disable debug code
 #endif  // FIRMWARE_SENSORS
@@ -313,6 +314,7 @@ char* ToHex_P(const unsigned char * in, size_t insz, char * out, size_t outsz, c
 #undef USE_RF_SENSOR                             // Disable support for RF sensor receiver (434MHz or 868MHz) (+0k8 code)
 #undef USE_HRE                                   // Disable support for Badger HR-E Water Meter (+1k4 code)
 #undef USE_A4988_STEPPER                         // Disable support for A4988_Stepper
+#undef USE_ARDUINO_SLAVE                         // Disable support for Arduino Uno/Pro Mini via serial interface including flashing (+2k3 code, 44 mem)
 #undef DEBUG_THEO                                // Disable debug code
 #undef USE_DEBUG_DRIVER                          // Disable debug code
 #endif  // FIRMWARE_CLASSIC
@@ -486,6 +488,7 @@ char* ToHex_P(const unsigned char * in, size_t insz, char * out, size_t outsz, c
 #undef USE_RF_SENSOR                             // Disable support for RF sensor receiver (434MHz or 868MHz) (+0k8 code)
 #undef USE_HRE                                   // Disable support for Badger HR-E Water Meter (+1k4 code)
 #undef USE_A4988_STEPPER                         // Disable support for A4988_Stepper
+#undef USE_ARDUINO_SLAVE                         // Disable support for Arduino Uno/Pro Mini via serial interface including flashing (+2k3 code, 44 mem)
 #undef DEBUG_THEO                                // Disable debug code
 #undef USE_DEBUG_DRIVER                          // Disable debug code
 #endif  // FIRMWARE_IR
@@ -589,6 +592,7 @@ char* ToHex_P(const unsigned char * in, size_t insz, char * out, size_t outsz, c
 #undef USE_RF_SENSOR                             // Disable support for RF sensor receiver (434MHz or 868MHz) (+0k8 code)
 #undef USE_HRE                                   // Disable support for Badger HR-E Water Meter (+1k4 code)
 #undef USE_A4988_STEPPER                         // Disable support for A4988_Stepper
+#undef USE_ARDUINO_SLAVE                         // Disable support for Arduino Uno/Pro Mini via serial interface including flashing (+2k3 code, 44 mem)
 #undef DEBUG_THEO                                // Disable debug code
 #undef USE_DEBUG_DRIVER                          // Disable debug code
 #endif  // FIRMWARE_BASIC
@@ -688,6 +692,7 @@ char* ToHex_P(const unsigned char * in, size_t insz, char * out, size_t outsz, c
 #undef USE_RF_SENSOR                             // Disable support for RF sensor receiver (434MHz or 868MHz) (+0k8 code)
 #undef USE_HRE                                   // Disable support for Badger HR-E Water Meter (+1k4 code)
 #undef USE_A4988_STEPPER                         // Disable support for A4988_Stepper
+#undef USE_ARDUINO_SLAVE                         // Disable support for Arduino Uno/Pro Mini via serial interface including flashing (+2k3 code, 44 mem)
 #undef DEBUG_THEO                                // Disable debug code
 #undef USE_DEBUG_DRIVER                          // Disable debug code
 #endif  // FIRMWARE_MINIMAL