ha-sengledapi VS ble_monitor

HA has a custom integration for Spengler, but looks like the color and brightness functionality was removed. (https://github.com/jfarmer08/ha-sengledapi). I installed it and found it only controlled ON/OFF. But agree - would be better to do this entirely locally via HA Instead of having to go through a HA-to-Alexa Integration.

I setup the Sengled API integration from jfarmer8 Link

If you're using the Sengled wifi bulbs, I'd say yes. It looks like someone created an extension to control them through an unofficial API

For those who are interested, the Passive BLE monitor Home Assistant integration supports quite a few thermometers. The Govee support is based on a component I wrote, Home-Is-Where-You-Hang-Your-Hack/sensor.goveetemp_bt_hci/. If you are looking for just the decoder, check out Thrilleratplay/GoveeWatcher.

However, I use some of their other (older?) BLE temp sensors, and for Home Assistant, you can use this driver for them: https://github.com/custom-components/ble_monitor

FWIW, if your HASS is running on a device (like a Raspberry Pi) that has Bluetooth, you might be able to get away with a custom component like https://github.com/custom-components/ble_monitor instead. Of course, if your setup is working for you already there isn't much incentive to change it.

https://github.com/custom-components/ble_monitor will work with govee

Once again, who knows better how to install it other than the guys who made it? No one , luckily for you, even being an Hacs integration (so not necessarily polished) the documentation seems very well written

Yes, there's an installable component with HACS : https://github.com/custom-components/ble_monitor It's working really well 👌