6.5.0.11 20190517
* Add user define INDEX_SEPARATOR to control Sensor Name index character which was fixed to "-" (minus) but is now changed to "_" (underscore) for future support.
* This change impacts DS18X20, DHT, BMP and SHT3X sensor names.
Add define USE_MQTT_TLS_CA_CERT for checking MQTT TLS against root ca using Let's Encrypt cert from sonoff_letsencrypt.h - not supported with core 2.3.0 (#4703)
6.3.0.12 20181122
* Remove delays introduced in 6.3.0.11 (#4233)
* Add additional start-up delay during initial wifi connection
* Add support for I2C MGC3130 Electric Field Effect sensor by Christian Baars (#3774, #4404)
* Add initial support for Hass sensor discovery (#4380)
6.2.1.17 20181017
* Enable updated non-blocking PubSubClient as default MQTT client
* Update TasmotaModbus and TasmotaSerial libraries for support of serial 8N2 communication
* Add support for Pzem-003/017 DC Energy monitoring module (#3694)
* Change support for Pzem-014/016 AC Energy monitoring module (#3694)
6.1.1b
* Add default Wifi Configuration tool as define WIFI_CONFIG_NO_SSID in user_config.h if no SSID is configured (#3224)
* Add user selection of Wifi Smartconfig as define USE_SMARTCONFIG in user_config.h
* Add user selection of WPS as define USE_WPS in user_config.h in preparation for core v2.4.2 (#3221)
* Change default Wifi config option from WPS to Wifi Manager if WPS is disabled
* or Wifi Smartconfig if webserver is disabled
* or Wifi Serial input if Smartconfig is disabled
* Remove WPS and SmartConfig from sonoff-minimal saving 56k code space
6.1.0b
* Add user selection of WPS as define USE_WPS in user_config.h in preparation for core v2.4.2 (#3221)
* Change default Wifi config option from WPS to Wifi Manager if WPS is disabled (or Wifi Smartconfig if webserver is disabled)
* Remove WPS from sonoff-minimal saving 33k code space
* Revert wifi changes implemented in v6.0.0a due to possible bad initial wifi connections
5.12.0m
* Remove sonoff-xxl
* Add sonoff-classic, sonoff-allsensors and sonoff-knx
* Add some coloring to important web buttons
* Add user selectable defines for Sunrise/set Dawn option (#2378)
* Add GPIO_User to GPIO02 for all Sonoff T1 (#2524)