Try …
sudo apt-get install pi-bluetooth
Installed.
But if i try to continue with sudo hciconfig hci0 up i still receive error: “Can’t get device info: No such device”.
Check your file sudo nano /boot/config.txt for an entry like
dtoverlay=pi3-disable-bt
and make sure this line is commented out by adding a # at the beginning of the line. Its usually at the bottom of the file.
I found this entry commented:
Uncomment this to enable the lirc-rpi module
dtoverlay=lirc-rpi
OK, that about exhausted my knowledge of BT on the pi, I would probably reinstall at this point 
And mine is no better the plant monitors all return 0
My git’s read me specifies how I did to get it working. If you’re reinstalling it might be worth a look:
Thanks, I’ll give it a look 
Hello,
To use the xiaomi plant with HA, is needed a bluetooth connection? There is no other option?
thanks
You do need a BLE connection, there is no other option as far as I know as they are BLE devices.
I’ll give it a look to. TY
ok. I’ll try to reinstall it. TY for your support
Ok. Now it seems work.
Below what I’ve done as root:
apt-get update && apt-get -y upgrade
apt-get -y install build-essential checkinstall cython3 git htop libgcrypt11-dev libgnutls28-dev libudev-dev libyaml-dev python3-dev python3-pip python3-setuptools python3-sphinx vim python3-venv nmap
apt-get install --upgrade pi-bluetooth
apt-get install --upgrade bluez
apt-get install --upgrade bluez-firmware
apt-get install bluetooth bluez blueman
reboot
sudo bluetoothctl
in the [bluetooth]
agent on
default-agent
For those of you wanting to use this sensor under Windows look at the following thread Running Home Assistant on windows
I just received my flower sensor! Is there an updated working step-by-step guide that anyone can share or link to? Is the first post in the thread working?
//F
What platform are you running on? Linux?
Ohh, forgot to write that… i’m running The latest version of Hassbian on a Raspberry Pi
From yesterda, without any action, mi flora started working again!
Mine to, very strange 
but welcome back, I have no clue why they suddenly started working again.
It’s magically magic! 