Add Switchbot support and discovery. (#995)

* Use a task to process immediate BLE actions to prevent MQTT disconnection if the action takes too long to complete.

* Add state_on and state_off parameters to createDiscovery

platformio.ini

@@ -212,11 +212,11 @@ board_build.ldscript = eagle.flash.1m64.ld ;this frees more space for firmware u
 [env:sonoff-rfbridge-direct]
 platform = espressif8266@^2
 board = esp8285
-lib_deps = 
+lib_deps =
   ${com-esp.lib_deps}
   ${libraries.wifimanager8266}
   ${libraries.esppilight}
-build_flags = 
+build_flags =
   ${com-esp.build_flags}
   '-DZgatewayPilight="Pilight"'
   '-DRF_RECEIVER_GPIO=4'
@@ -374,9 +374,9 @@ lib_deps =
   ${com-esp.lib_deps}
   ${libraries.wifimanager32}
   ${libraries.emodbus}
-  ${libraries.gfSunInverter}  
+  ${libraries.gfSunInverter}
 build_flags =
-  ${com-esp.build_flags}  
+  ${com-esp.build_flags}
   '-DZgatewayGFSunInverter="GFSunInverter"'
   '-DGateway_Name="OpenMQTTGateway_ESP32_GFSunInverter"'
 
@@ -702,7 +702,7 @@ lib_deps =
   ${libraries.ble}
   ${libraries.decoder}
   ${libraries.irremoteesp}
-build_flags = 
+build_flags =
   ${com-esp.build_flags}
   '-DZgatewayBT="BT"'
   '-DZgatewayIR="IR"'
@@ -726,7 +726,7 @@ build_flags =
   '-DZgatewayRTL_433="rtl_433"'
   '-DGateway_Name="OpenMQTTGateway_rtl_433_ESP"'
   '-DvalueAsASubject=true'    ; mqtt topic includes model and device
-;  '-DPUBLISH_UNPARSED=true'  ; Publish details of undecoded signals 
+;  '-DPUBLISH_UNPARSED=true'  ; Publish details of undecoded signals
 ;  '-DRTL_DEBUG=4'            ; enable rtl_433 verbose device decode
 
 [env:esp32dev-multi_receiver]
@@ -810,7 +810,7 @@ build_flags =
   '-DZgatewayLORA="LORA"'
   '-DZgatewayBT="BT"'
   '-DGateway_Name="OpenMQTTGateway_ESP32_BLE_LORA"'
-  
+
   '-DLED_SEND_RECEIVE=21' # T-BEAM board V0.5
 #  '-DLED_SEND_RECEIVE=14' # T-BEAM board  V0.7
 #  '-DLED_SEND_RECEIVE=4' # T-BEAM board  V1.0+
@@ -823,7 +823,7 @@ build_flags =
   '-DADC_GPIO=35'
   '-DADC_DIVIDER=2'
   # Reading battery level every minutes should be more than enought
-  '-DTimeBetweenReadingADC=60000' 
+  '-DTimeBetweenReadingADC=60000'
 
 [env:heltec-wifi-lora-32-868]
 platform = ${com.esp32_platform}
@@ -990,7 +990,7 @@ lib_deps =
   ${libraries.wifimanager8266}
   ${libraries.irremoteesp}
   ${libraries.esp8266_mdns}
-build_flags = 
+build_flags =
   ${com-esp.build_flags}
   '-DZgatewayIR="IR"'
   '-DTRIGGER_GPIO=13'