Show current CPU Frequency in WebUI and maybe Home Assistant integration

[CRCinAU]

Now that we have 80 & 160Mhz binaries, it would be good to show which one is actually in use on an ESP8266 based chip.

I recently updated my WLED install on a device I had changed to the 160Mhz binary, but there was no way to tell if it updated to an 80 or 160Mhz version of WLED.

[blazoncek]

There is no API to detect the actual CPU frequency. If you see no difference and you are getting adequate performance then it doesn't matter what CPU frequency is.

EDIT: Apparently there is API.

[CRCinAU]

Yeah - I haven't looked at the WLED code closely - but if its using the normal Arduino libraries, some random code I used on a WebUI is:

		F("<tr><td>IP Addresses</td><td>") + ip_addr + F("</td></tr>\n") +
		F("<tr><td>MAC Address</td><td>") + WiFi.macAddress().c_str() + F("</td></tr>\n") +
		F("<tr><td>CPU Speed:</td><td>") + ESP.getCpuFreqMHz() + F(" MHz</td></tr>\n") +
		F("<tr><td>Flash Speed:</td><td>") + (ESP.getFlashChipSpeed() / 1000000) + F(" Mhz</td></tr>\n") +
		F("<tr><td>Flash Real Size:</td><td>") + ESP.getFlashChipRealSize() + F(" bytes</td></tr>\n") +
		F("<tr><td>Flash Mode:</td><td>") +
			(
			ESP.getFlashChipMode() == FM_QIO ? "QIO" :
			ESP.getFlashChipMode() == FM_QOUT ? "QOUT" :
			ESP.getFlashChipMode() == FM_DIO ? "DIO" :
			ESP.getFlashChipMode() == FM_DOUT ? "DOUT" :
			"UNKNOWN") + F("</td></tr>\n") +

[blazoncek]

would that do it?

[CRCinAU]

That would be beautiful :)

That way, I can see what build has actually been flashed :)