4.1.3 20170410
* Add user configuarble GPIO to module S20 Socket and Slampher
* Add support for Sonoff SC (#112)
* Set PWM frequency from 1000Hz to 910Hz as used on iTead Sonoff Led
firmware (#122)
* Set Sonoff Led unconfigured floating outputs to 0 to reduce exceptions
due to power supply instabilities (#122)
* Add Access Point Mac Address to Status 11 and Telemetry (#329)
* Fix DS18B20 negative temperature readings (#334)
4.0.1 20170305
* Fix char default sizes and set MESSZ to 360 (#143)
* Fix SerialLog setting status
* Disable syslog when emulation is active
* Add DS18B20 web page display refresh
3.9.22 20170228
* Update web console
* Fix Status 4 JSON message
* Add Exception info during restart if available
* Add osWatch service to detect loop hangs that might happen during
(OTA) upgrades
* Add WiOn support for relay and switch only (#82, #102)
* Allow for user specified relay count up to four in sonoff_template.h
(#109)
* Add support for HTU21 compatible I2C sensors SI7013, SI7020 and SI7021
(#118)
* Add NodeMCU or Wemos configuration option (#119)
3.9.15 20170213
* Change JSON float values from string to number according to
http://json.org (#56)
* Add support for exs latched relay module
https://ex-store.de/ESP8266-WiFi-Relay-V31 (#58)
* Add support for inverted relays
* Changed MAX_LOG_LINES from 70 to 60 to preserve memory
3.9.11 20170204
* Fix command I2Cscan
* Fix not allowed spaces in Topic, ButtonTopic and SwitchTopic
* Make all TELEMETRY, STATUS and COMMAND message topics unique (#4)
* Advertise command topic to be used by iobroker (#299)
* Fix butten (non)detection if no GPIO_KEY1 is defined (#13)
* Change WeMo serialnumber from 7 decimal chars to 8 hexadecimal chars
(#18)
* Update web page with Build Date/Time, Emulation and mDNS Discovery and
Advertise information (#21)