[Request] Add additional MQTT topics

[DejanBukovec]

Is your feature request related to a problem? Please describe.

No response

Describe the solution you'd like

Please add next MQTT topics:

• Firmware Version / Git Hash
• Firmware Update

That way we can get some notifications on Home Assistant that new update is availible...

Describe alternatives you've considered

No response

Additional context

No response

[DcFamas]

Hey there,
I also want to ask for a sum up of this values:

(Screenshot by AhoyDTU)

Best regards :)

[tbnobody]

Please see #317 (comment)

Currently there are just other prios (like HMS/HMT)

[stefan123t]

Here Eventlog Code and Count have been requested as MQTT Topics too: #424

Here RSSI / dBi for CMT2300A connection has been requested as MQTT Topic per inverter: #980

Either the quality using the NRF bit Strong (>64dBm) or Weak (<64dBm) or
the Ratio between RX/TX gathered by the GetLossRate 0x15 command could be returned instead for NRF24L01+ connections
as descibed in #980 and #661.

In #1050 we have the request to add the following total topics if I understood it right:

• dtu/total/dc/power (solar/dc/power)
• dtu/total/ac/power (solar/ac/power)
• dtu/total/ac/yieldday (solar/ac/yieldday)
• dtu/total/ac/yieldtotal (solar/ac/yieldtotal)

In #1129 there is a request to add the following topic to distinguish between day/night mode:

• dtu/daylight (hoymiles/dtu/mode) values being "day" / "night" or true / false

In PR #2268 ESP heap and temperature are added by @ranma:

• dtu/temperature
• dtu/heapSize
• dtu/heapFree
• dtu/heapMinFree
• dtu/heapMaxAlloc