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bluetooth-proxies
Discontinued This repo hosts known, tested devices that can serve as Bluetooth proxies for Home Assistant.
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Another option is an RTL-SDR antenna like this, paired with the RTL_433 add-on in HA. Then you can use any supported 433MHz sensors like this and this. 433MHz isn't a mesh network like Zigbee, but it does have longer range, doesn't require any pairing, and the sensors send updates every 16s, and take standard AAA batteries.
If you're already using Home Assistant, you can install ESPHome on any ESP32-based device and use it as a Bluetooth Proxy hub. I already had some smartplugs and bulbs flashed with ESPHome, so it was as simple as adding a couple more lines of code to get a few BLE Proxy hubs, with no additional hardware required for the hub.