diff --git a/README.md b/README.md
index 7f7118e71..1d3c365bb 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 ## Sonoff-Tasmota
 Provide ESP8266 based Sonoff by [iTead Studio](https://www.itead.cc/) and ElectroDragon IoT Relay with Serial, Web and MQTT control allowing 'Over the Air' or OTA firmware updates using Arduino IDE.
 
-Current version is **5.9.0b** - See [sonoff/_releasenotes.ino](https://github.com/arendst/Sonoff-Tasmota/blob/development/sonoff/_releasenotes.ino) for change information.
+Current version is **5.9.1a** - See [sonoff/_releasenotes.ino](https://github.com/arendst/Sonoff-Tasmota/blob/development/sonoff/_releasenotes.ino) for change information.
 
 ### ATTENTION All versions
 
diff --git a/sonoff/_releasenotes.ino b/sonoff/_releasenotes.ino
index 10f090796..ccd0e8d18 100644
--- a/sonoff/_releasenotes.ino
+++ b/sonoff/_releasenotes.ino
@@ -1,12 +1,13 @@
-/* 5.9.0b
+/* 5.9.1a
+ * Fix PWM watchdog timeout if Dimmer is set to 100 or Color set to 0xFF (#1146)
+ *
+ * 5.9.1 20171107
+ * Add external sensor function pointer interface to enable easy sensor addition
  * Add support for ADS1115 to be enabled in user_config.h and needs libraries i2cdevlib-Core and i2cdevlib-ADS1115 (#338, #660)
+ * Fix Backup Configuration file download failure by defining proper file size (#1115)
  * Fix Exception 26 and empty console screen after usage of command WakeupDuration (#1133)
  * Fix some changed iTead web links in README.md (#1137)
  *
- * 5.9.0a
- * Add external sensor function pointer interface to enable easy sensor addition
- * Fix Backup Configuration file download failure by defining proper file size (#1115)
- *
  * 5.9.0 20171030
  * Rewrite code (partly) using Google C++ Style Guide (https://google.github.io/styleguide/cppguide.html)
  * Rewrite code by using command lookup tables and javascript (client side) web page expansions
diff --git a/sonoff/sonoff.h b/sonoff/sonoff.h
index dc3882854..042d72dda 100644
--- a/sonoff/sonoff.h
+++ b/sonoff/sonoff.h
@@ -100,18 +100,27 @@ enum WeekInMonthOptions {Last, First, Second, Third, Fourth};
 enum DayOfTheWeekOptions {Sun=1, Mon, Tue, Wed, Thu, Fri, Sat};
 enum MonthNamesOptions {Jan=1, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec};
 enum HemisphereOptions {North, South};
+
 enum LoggingLevels {LOG_LEVEL_NONE, LOG_LEVEL_ERROR, LOG_LEVEL_INFO, LOG_LEVEL_DEBUG, LOG_LEVEL_DEBUG_MORE, LOG_LEVEL_ALL};
+
 enum WifiConfigOptions {WIFI_RESTART, WIFI_SMARTCONFIG, WIFI_MANAGER, WIFI_WPSCONFIG, WIFI_RETRY, WIFI_WAIT, MAX_WIFI_OPTION};
+
 enum SwitchModeOptions {TOGGLE, FOLLOW, FOLLOW_INV, PUSHBUTTON, PUSHBUTTON_INV, PUSHBUTTONHOLD, PUSHBUTTONHOLD_INV, MAX_SWITCH_OPTION};
+
 enum LedStateOptions {LED_OFF, LED_POWER, LED_MQTTSUB, LED_POWER_MQTTSUB, LED_MQTTPUB, LED_POWER_MQTTPUB, LED_MQTT, LED_POWER_MQTT, MAX_LED_OPTION};
+
 enum EmulationOptions {EMUL_NONE, EMUL_WEMO, EMUL_HUE, EMUL_MAX};
+
 enum ButtonStates {PRESSED, NOT_PRESSED};
+
 enum SettingsParmaIndex {P_HOLD_TIME, P_MAX_POWER_RETRY, P_MAX_PARAM8};
+
 enum Ws2812ClockIndex {WS_SECOND, WS_MINUTE, WS_HOUR};
 enum Ws2812Color {WS_RED, WS_GREEN, WS_BLUE};
 enum LightTypes {LT_BASIC, LT_PWM1, LT_PWM2, LT_PWM3, LT_PWM4, LT_PWM5, LT_PWM6, LT_PWM7, LT_NU8, LT_NU9, LT_NU10, LT_WS2812, LT_RGBW, LT_RGBWC};
 enum LichtSubtypes {LST_NONE, LST_SINGLE, LST_COLDWARM, LST_RGB, LST_RGBW, LST_RGBWC};
 enum LichtSchemes {LS_POWER, LS_WAKEUP, LS_CYCLEUP, LS_CYCLEDN, LS_RANDOM, LS_MAX};
+
 enum XsnsFunctions {FUNC_XSNS_INIT, FUNC_XSNS_PREP, FUNC_XSNS_JSON_APPEND, FUNC_XSNS_MQTT_SHOW, FUNC_XSNS_WEB};
 
 const uint8_t kDefaultRfCode[9] PROGMEM = { 0x21, 0x16, 0x01, 0x0E, 0x03, 0x48, 0x2E, 0x1A, 0x00 };
diff --git a/sonoff/sonoff.ino b/sonoff/sonoff.ino
index 92be64043..11fb88901 100644
--- a/sonoff/sonoff.ino
+++ b/sonoff/sonoff.ino
@@ -25,7 +25,7 @@
     - Select IDE Tools - Flash Size: "1M (no SPIFFS)"
   ====================================================*/
 
-#define VERSION                0x05090002   // 5.9.0b
+#define VERSION                0x05090101   // 5.9.1a
 
 // Location specific includes
 #include "sonoff.h"                         // Enumaration used in user_config.h
@@ -2612,7 +2612,7 @@ void GpioInit()
 
   hlw_flg = ((pin[GPIO_HLW_SEL] < 99) && (pin[GPIO_HLW_CF1] < 99) && (pin[GPIO_HLW_CF] < 99));
 
-  XSnsInit();
+//  XSnsInit();
 }
 
 extern "C" {
@@ -2726,9 +2726,10 @@ void setup()
 
   blink_powersave = power;
 
-  if (SONOFF_SC == Settings.module) {
-    SonoffScInit();
-  }
+//  if (SONOFF_SC == Settings.module) {
+//    SonoffScInit();
+//  }
+  XSnsInit();
 
   RtcInit();
 
diff --git a/sonoff/xdrv_snfled.ino b/sonoff/xdrv_snfled.ino
index 7c68aa1f4..e35d0098c 100644
--- a/sonoff/xdrv_snfled.ino
+++ b/sonoff/xdrv_snfled.ino
@@ -179,7 +179,7 @@ void LightInit(void)
       Settings.pwm_value[i] = 0;        // Disable direct PWM control
     }
     if (LT_PWM1 == light_type) {
-      Settings.light_color[0] = 255;      // One PWM channel only supports Dimmer but needs max color
+      Settings.light_color[0] = 255;    // One PWM channel only supports Dimmer but needs max color
     }
     if (SONOFF_LED == Settings.module) { // Fix Sonoff Led instabilities
       if (!my_module.gp.io[4]) {
@@ -270,8 +270,8 @@ void LightSetDimmer(uint8_t myDimmer)
 {
   float temp;
 
-  if ((SONOFF_BN == Settings.module) && (100 == myDimmer)) {
-    myDimmer = 99;                      // BN-SZ01 starts flickering at dimmer = 100
+  if (LT_PWM1 == light_type) {
+    Settings.light_color[0] = 255;    // One PWM channel only supports Dimmer but needs max color
   }
   float dimmer = 100 / (float)myDimmer;
   for (byte i = 0; i < light_subtype; i++) {
@@ -527,6 +527,9 @@ void LightAnimate()
         cur_col[i] = (Settings.light_correction) ? ledTable[light_last_color[i]] : light_last_color[i];
         if (light_type < LT_PWM6) {
           if (pin[GPIO_PWM1 +i] < 99) {
+            if (cur_col[i] > 0xFC) {
+              cur_col[i] = 0xFC;   // Fix unwanted blinking and PWM watchdog errors for values close to pwm_range (H801, Arilux and BN-SZ01)
+            }
             uint16_t curcol = cur_col[i] * (Settings.pwm_range / 255);
 //            snprintf_P(log_data, sizeof(log_data), PSTR(D_LOG_APPLICATION "Cur_Col%d %d, CurCol %d"), i, cur_col[i], curcol);
 //            AddLog(LOG_LEVEL_DEBUG);
@@ -856,6 +859,7 @@ boolean LightCommand(char *type, uint16_t index, char *dataBuf, uint16_t data_le
   else if (CMND_DIMMER == command_code) {
     if ((payload >= 0) && (payload <= 100)) {
       Settings.light_dimmer = payload;
+      light_update = 1;
       coldim = true;
     } else {
       snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_NVALUE, command, Settings.light_dimmer);
diff --git a/sonoff/xsns_04_snfsc.ino b/sonoff/xsns_04_snfsc.ino
index 38b355ed2..28453d5da 100644
--- a/sonoff/xsns_04_snfsc.ino
+++ b/sonoff/xsns_04_snfsc.ino
@@ -148,8 +148,9 @@ boolean Xsns04(byte function)
 
   if (SONOFF_SC == Settings.module) {
     switch (function) {
-//      case FUNC_XSNS_INIT:
-//        break;
+      case FUNC_XSNS_INIT:
+        SonoffScInit();
+        break;
 //      case FUNC_XSNS_PREP:
 //        break;
       case FUNC_XSNS_JSON_APPEND: