Features:

• MQTT status implemented (#165). Online and offline state off the device is reported with an additional 'alive' property in the status MQTT report. If the device is offline, an 'alive:false' will be send by the MQTT broker as a last will message.

Fix:

• Update interval of 2 seconds for the MCU reimplemented. Some devices doesn't send a direct response to the ESP at changes on the device. For this, the firmware now request the device state every 2 seconds. So state updates should now send via MQTT latest after 2 seconds