diff --git a/sonoff/_changelog.ino b/sonoff/_changelog.ino
index 6fd2e5f0a..fa2183986 100644
--- a/sonoff/_changelog.ino
+++ b/sonoff/_changelog.ino
@@ -1,6 +1,7 @@
 /*********************************************************************************************\
  * 6.6.0.14 20190925
  * Change command Tariffx to allow time entries like 23 (hours), 1320 (minutes) or 23:00. NOTE: As this is development branch previous tariffs are lost! (#6488)
+ * Remove support for define USE_DS18x20_LEGACY and legacy DS18x20 driver (#6486)
  *
  * 6.6.0.13 20190922
  * Add command EnergyReset4 x,x to initialize total usage for two tarrifs
diff --git a/sonoff/my_user_config.h b/sonoff/my_user_config.h
index 12bbb60ce..c9e9521a1 100644
--- a/sonoff/my_user_config.h
+++ b/sonoff/my_user_config.h
@@ -321,8 +321,7 @@
 //#define USE_ADC_VCC                              // Display Vcc in Power status. Disable for use as Analog input on selected devices
 
 // -- One wire sensors ----------------------------
-                                                 // WARNING: Select none for default one DS18B20 sensor or enable one of the following two options for multiple sensors
-//#define USE_DS18x20_LEGACY                       // Optional for more than one DS18x20 sensors with dynamic scan using library OneWire (+1k5 code)
+                                                 // WARNING: Select none for default one DS18B20 sensor or enable the following option for multiple sensors
 #define USE_DS18x20                              // Optional for more than one DS18x20 sensors with id sort, single scan and read retry (+1k3 code)
 //  #define W1_PARASITE_POWER                      // If using USE_DS18x20 then optimize for parasite powered sensors
 //  #define DS18B20_INTERNAL_PULLUP                // Use INPUT_PULLUP internal pullup resistors for single DS18B20
diff --git a/sonoff/sonoff_post.h b/sonoff/sonoff_post.h
index 9d9bbb014..3a792f569 100644
--- a/sonoff/sonoff_post.h
+++ b/sonoff/sonoff_post.h
@@ -98,7 +98,6 @@ char* ToHex_P(const unsigned char * in, size_t insz, char * out, size_t outsz, c
 #define USE_COUNTER                           // Enable counters
 #undef USE_ADC_VCC                            // Add Analog input on selected devices
 #define USE_DS18x20                           // For more than one DS18x20 sensors with id sort, single scan and read retry (+1k3 code)
-//#define USE_DS18x20_LEGACY                     // For more than one DS18x20 sensors with dynamic scan using library OneWire (+1k5 code)
 
 #define USE_I2C                               // I2C using library wire (+10k code, 0k2 mem, 124 iram)
 #define USE_SHT                               // Add I2C emulating code for SHT1X sensor (+1k4 code)
@@ -415,7 +414,7 @@ char* ToHex_P(const unsigned char * in, size_t insz, char * out, size_t outsz, c
  * Mandatory define for DS18x20 if changed by above image selections
 \*********************************************************************************************/
 
-#if defined(USE_DS18x20) || defined(USE_DS18x20_LEGACY)
+#if defined(USE_DS18x20)
 #else
 #define USE_DS18B20                           // Default DS18B20 sensor needs no external library
 #endif
@@ -461,7 +460,6 @@ char* ToHex_P(const unsigned char * in, size_t insz, char * out, size_t outsz, c
 
 #undef USE_COUNTER                            // Disable counters
 #undef USE_DS18x20                            // Disable DS18x20 sensor
-#undef USE_DS18x20_LEGACY                     // Disable DS18x20 sensor
 #undef USE_DS18B20                            // Disable internal DS18B20 sensor
 #undef USE_I2C                                // Disable all I2C sensors and devices
 #undef USE_SPI                                // Disable all SPI devices
@@ -546,7 +544,6 @@ char* ToHex_P(const unsigned char * in, size_t insz, char * out, size_t outsz, c
 
 #undef USE_COUNTER                            // Disable counters
 #undef USE_DS18x20                            // Disable DS18x20 sensor
-#undef USE_DS18x20_LEGACY                     // Disable DS18x20 sensor
 #undef USE_DS18B20                            // Disable internal DS18B20 sensor
 #undef USE_I2C                                // Disable all I2C sensors and devices
 #undef USE_SPI                                // Disable all SPI devices
diff --git a/sonoff/sonoff_template.h b/sonoff/sonoff_template.h
index 0ab4d0752..e0f3c6e06 100644
--- a/sonoff/sonoff_template.h
+++ b/sonoff/sonoff_template.h
@@ -531,7 +531,7 @@ const uint8_t kGpioNiceList[] PROGMEM = {
   GPIO_DHT22,          // DHT21, DHT22, AM2301, AM2302, AM2321
   GPIO_SI7021,         // iTead SI7021
 #endif
-#if defined(USE_DS18B20) || defined(USE_DS18x20) || defined(USE_DS18x20_LEGACY)
+#if defined(USE_DS18B20) || defined(USE_DS18x20)
   GPIO_DSB,            // Single wire DS18B20 or DS18S20
 #endif
 
diff --git a/sonoff/support_features.ino b/sonoff/support_features.ino
index 35d900041..9b5e05747 100644
--- a/sonoff/support_features.ino
+++ b/sonoff/support_features.ino
@@ -243,7 +243,7 @@ void GetFeatures(void)
   feature_sns1 |= 0x00000010;  // xsns_05_ds18b20.ino
 #endif
 #ifdef USE_DS18x20_LEGACY
-  feature_sns1 |= 0x00000020;  // xsns_05_ds18x20_legacy.ino
+  feature_sns1 |= 0x00000020;  // xsns_05_ds18x20_legacy.ino - no more supported since 6.6.0.14
 #endif
 #ifdef USE_DS18x20
   feature_sns1 |= 0x00000040;  // xsns_05_ds18x20.ino