search

pvvx / ATC_MiThermometer

Custom firmware for the Xiaomi Thermometers and Telink Flasher
https://github.com/pvvx/pvvx.github.io/tree/master/ATC_MiThermometer
Other
2.93k stars 205 forks source link

Looking for bluetooth 5.0+ usb adapter recommendations #325

Closed delet-this closed 1 year ago

delet-this commented 1 year ago

Are there any specific, preferably cheap bt 5.0+ usb dongles you would recommend to use with this firmware + LYWSD03MMC? Or should I just choose something from here https://www.home-assistant.io/integrations/bluetooth#realtek-rtl8761bu-adapters

Thanks!

pvvx commented 1 year ago

There are many RTL8761BU adapters. The FW in RTL8761BU is loaded by the system, and it makes no sense to look at the label on the adapter. The downloadable FW in RTL8761BU has long supported Bluetooth 5.1.

image

The reception level without mass dropouts for the LE Long Range at RTL8761BU is up to -108 dBm.

image

The adapter with RTL8761BU without an external antenna has mediocre reception from thermometers in LE Long Range for distances in a straight line without obstacles of more than 200 meters. But RTL8761BU does not work well with a large number of BLE devices due to the low speed of USB - USB 2.0 FS.

Since I have a lot of BLE devices (more than 30 active, processed in HA), I use 2 USB-BT adapters. One for reception with Legacy (BT4.2 with USB 2.0 HS) and the other for working with LE Long Range devices.

delet-this commented 1 year ago

Thank you! I think any RTL8761BU adapter should fit my needs for now.

pvvx commented 1 year ago

Orange Pi 3 lts, Pi 5, ... have already been adjusted and are working with the LE Long Range.