Xiaomi Thermostat (with display)

[Chakkie]

Check out https://github.com/pFenners/mijia-sensor-domoticz

I got my 3 Xiaomi Mijia Bluetooth Temperature Humidity Sensors linked up to Domoticz using the built-in bluetooth on Raspberry Pi3

Works pretty well, however I need to set my Mijia BLE Temp + Humidity sensor in 'pairing' (flasing BT icon) mode before I get any readouts. When the RPI sets up the connection, the script updates Domoticz flawless though...
Maybe the sensor needs to be unpaired with any devices?

Else I receive connect error: Transport endpoint is not connected (107)

I have the same issue. Have you solved it yet? Basically I have to pressed and hold the pairing button to get the data readout.
I use the script from freibeuter

[ayziaa]

Check out https://github.com/pFenners/mijia-sensor-domoticz

I got my 3 Xiaomi Mijia Bluetooth Temperature Humidity Sensors linked up to Domoticz using the built-in bluetooth on Raspberry Pi3

Works pretty well, however I need to set my Mijia BLE Temp + Humidity sensor in 'pairing' (flasing BT icon) mode before I get any readouts. When the RPI sets up the connection, the script updates Domoticz flawless though...
Maybe the sensor needs to be unpaired with any devices?

Else I receive connect error: Transport endpoint is not connected (107)

I have the same issue. Have you solved it yet? Basically I have to pressed and hold the pairing button to get the data readout.
I use the script from freibeuter

any news? I was planing on buying one device before I saw your post.

[Chakkie]

[/quote]
any news? I was planing on buying one device before I saw your post.
[/quote]

It is working perfectly now.

First complete the tutorial for miflora

https://www.domoticz.com/wiki/Mi_Flora_Bluetooth_LE

Then run the domoticz_mijia.py script

https://github.com/pFenners/mijia-sensor-domoticz

Since I am running the old OS (Wheezy) Python3 will not work and got error when running the script

So you need to install Python 3.4

so insteads of
usr/bin/python3

usr/bin/python3.4

Furthermore you need to run the following commands at the start up of the system.

sudo tools/btmgmt le on
sudo tools/btmgmt connectable on
sudo tools/btmgmt power on

So put the command in a bash script and put the script in /etc/init.d/

[mspider65]

I also use these sensors in my home automation system and starting from the source code of the hcitool command, i have created a simple tool that allows to obtain the measurements sent by the sensor.
https://github.com/mspider65/Xiaomi-Mij ... ity-Sensor

This is also what I learned by analyzing the Bluetooth messages sent by the device.
As soon as the battery is inserted, the sensor starts sending advertisement data every two seconds and the advertisement data contains all the useful information (Temperature, Humidity and Battery Level).
You can test it with the two Bluez commands hcitool and hcidump (or any other tool able to read advertisement data sent by BLE devices).
In order to show the raw data sent by the sensor, you should first start in background a BT le scan and then print the raw data.

Code: Select all

sudo hcitool lescan --passive &
hcidump --raw

The option '--passive' means that you are not sending any request to the sensor but you are just receiving the advertisements sent by the BLE devices.
If you scan without '--passive' option, you will send a scan request, and the device will respond with some other additional data (Sensor Name, available UUIDs) but it is not necessary and you will only waste the sensor battery.

Looking at the hcidump output you can identify four type of messages.

- Temperature & Humidity:

Code: Select all

Header:			04 3E 25 02 01 00 00 XX XX XX XX XX XX 19
Flags AD:		02 01 06
Service Data AD:	15 16 95 FE 50 20 AA 01 17 XX XX XX XX XX XX 0D 10 04 B9 00 5C 02
RSSI:			A4

- Battery Level

Code: Select all

Header:			04 3E 22 02 01 00 00 XX XX XX XX XX XX 16
Flags AD:		02 01 06
Service Data AD:	12 16 95 FE 50 20 AA 01 12 XX XX XX XX XX XX 0A 10 01 64
RSSI:			A6

- Humidity Only:

Code: Select all

Header:			04 3E 23 02 01 00 00 XX XX XX XX XX XX 17
Flags AD:		02 01 06
Service Data AD:	13 16 95 FE 50 20 AA 01 14 XX XX XX XX XX XX 06 10 02 5C 02
RSSI:			A6

- Temperature Only:

Code: Select all

Header:			04 3E 23 02 01 00 00 XX XX XX XX XX XX 17
Flags AD:		02 01 06
Service Data AD:	13 16 95 FE 50 20 AA 01 19 XX XX XX XX XX XX 04 10 02 B9 00
RSSI:			A7

The "Service Data AD" is the part of the message that carries the useful information.
But first we will give a look to the whole message.

Message Description
As example we will use the Temperature & Humidity message.
04 3E 25 02 01 00 00 XX XX XX XX XX XX 19 02 01 06 15 16 95 FE 50 20 AA 01 17 XX XX XX XX XX XX 0D 10 04 B9 00 5C 02 A6

Code: Select all

	Pos.	Value(hex)	Description
Header
	0	04		HCI Packet Type HCI Event
	1	3E		LE Meta event
	2	25		Nr of following bytes (37 bytes)
	3	02		LE Advertising report sub-event
	4	01		Number of reports
	5	00		Event type (connectable and scannable undirected advertising)
	6	00		Public address type
	7..12	XX..XX		BT Address (6 bytes)
	13	19		length of data field (25 bytes)
Data
	14	02		length of first advertising data (AD) structure
	15	01		type of first AD structure (0x01 = Flags)
	16	06		first AD data (0x06=LE General Discoverable Mode and BR/EDR Not Supported)
	17	15		length of second advertising data (AD) structure
	18	16		type of second AD structure (0x16=Service Data)
	19..38	95..02		Second AD data. This is the field with all the useful informations (see next table for details)
RSSI
	39	A6		RSSI value (signed byte, 0xA6=-90db)

Service Data AD
The most important information is contained into the second AD structure (type 0x16).
The Bluetooth specification defines the AD Type 0x16 as “Service Data”. This AD must contain at least two bytes representing the 16 bit UUID of this Service Data. The data following the UUID is custom data and the meaning is not defined in the Bluetooth specification.
The table below shows the meaning of “Service Data” AD for our sensor. As example we will use the Service Data AD of the same Temperature & Humidity message as above.
95 FE 50 20 AA 01 17 XX XX XX XX XX XX 0D 10 04 B9 00 5C 02

Code: Select all

Pos.	Value (Hex)	Description
0..1	95 FE	        UUID 16 bit (0xFE95)
2..5	50 20 AA 01	TBD (always 50 20 AA 01 for my three sensors)
6	17		Message counter (increments by 1 every message and then restart from 0 when reaches FF)
7..12	XX .. XX	Device BT address (6 bytes)
13	0D 	        Data type:
				0D -> Temperature & Humidity (4 bytes TL,TH,HL,HH)
				0A -> battery % (1 byte)
				06 -> only Humidity (2 bytes HL,HH)
				04 -> only Temperature (2 bytes TL, TH)
14	10		TBD (always 0x10 for my three sensors)
15	04		Nr of following bytes (depends on Data Type)
16..N	B9 00 5C 02	Data values:
				0x00B9 = 185 -> 18.5 C (Temperature)
				0x025C = 604 -> 60.4 % (Humidity)

[k0nstantin]

Hi
Can anyone help a beginner?
I installed this script:

https://github.com/pFenners/mijia-sensor-domoticz

When I run the script, the sensor gives the correct data, and then errors appear.

1: updating
Mi Sensor: 4C:65:A8:DD:66:33
Firmware: 00.00.66
Name: MJ_HT_V1
Temperature: 24.0°C
Humidity: 39.7%
Battery: 90%
http://127.0.0.1:8000/json.htm?type=com ... battery=90
Traceback (most recent call last):
File "/usr/lib/python3.5/urllib/request.py", line 1254, in do_open
h.request(req.get_method(), req.selector, req.data, headers)
File "/usr/lib/python3.5/http/client.py", line 1107, in request
self._send_request(method, url, body, headers)
File "/usr/lib/python3.5/http/client.py", line 1152, in _send_request
self.endheaders(body)
File "/usr/lib/python3.5/http/client.py", line 1103, in endheaders
self._send_output(message_body)
File "/usr/lib/python3.5/http/client.py", line 934, in _send_output
self.send(msg)
File "/usr/lib/python3.5/http/client.py", line 877, in send
self.connect()
File "/usr/lib/python3.5/http/client.py", line 849, in connect
(self.host,self.port), self.timeout, self.source_address)
File "/usr/lib/python3.5/socket.py", line 712, in create_connection
raise err
File "/usr/lib/python3.5/socket.py", line 703, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "domoticz_mijia.py", line 92, in
update("4C:65:A8:DD:66:33","41")
File "domoticz_mijia.py", line 88, in update
domoticzrequest("http://" + domoticzserver + "/json.htm?type=command&param=udevice&idx=" + idx_temp + "&nval ue=0&svalue=" + val_temp + ";" + val_hum + ";"+ val_comfort + "&battery=" + val_bat)
File "domoticz_mijia.py", line 29, in domoticzrequest
response = urllib.request.urlopen(request)
File "/usr/lib/python3.5/urllib/request.py", line 163, in urlopen
return opener.open(url, data, timeout)
File "/usr/lib/python3.5/urllib/request.py", line 466, in open
response = self._open(req, data)
File "/usr/lib/python3.5/urllib/request.py", line 484, in _open
'_open', req)
File "/usr/lib/python3.5/urllib/request.py", line 444, in _call_chain
result = func(*args)
File "/usr/lib/python3.5/urllib/request.py", line 1282, in http_open
return self.do_open(http.client.HTTPConnection, req)
File "/usr/lib/python3.5/urllib/request.py", line 1256, in do_open
raise URLError(err)
urllib.error.URLError: <urlopen error [Errno 111] Connection refused>

Maybe you can tell me what to do to remove these errors, and, the data was transmitted to the virtual adapter domoticz?

P.S. I also install the script of miflora (for Xiaomi Flower Monitor). It works without any problems.

[wbsch]

I also use these sensors in my home automation system and starting from the source code of the hcitool command, i have created a simple tool that allows to obtain the measurements sent by the sensor.
https://github.com/mspider65/Xiaomi-Mij ... ity-Sensor

Thank you so much for the work you put into that, and thank you even more for making it available to others! The protocol description saved me a lot of time.
I tried sending an e-mail to the address you used in those git commits, but that appears to be a dead end. Since it was basically just this, i.e. saying "Thank you!", I guess this forum will do.

I ported this over to Python and bluepy for my own use, but that's probably not relevant here since domoticz appears to be written in C++ (I've never actually used it or looked at its source, mind you).

[oxygen]

Seems strange.
I'm fighting a bit against those toys.
I can't manage to get them to push back data via bluethooth.

It seems that they act as if they were requesting to be paired as they refuse to get pooled by my system.

Whatever I do, I face a "connection refused".
I've tried connecting via the python script, then gatttool directly, then bluethoothctl.
Everytime, I can't get any data out of the device.

Do you need to do something specific to let it broadcast/push back the values via bluethooth ?
I haven't checked via phone, just via plain old Linux.

[oxygen]

I'm finally getting something by using the

Code: Select all

hcitool lescan --passive &
hcidump --raw

But it seems a bit unpractical, and only allows me to get one single read out of the device.

I'm loosing my head around this thing

[oxygen]

Alright.
Good news, I've managed to fix the issue

It all goes down to an issue on the bluetooth stack configuration and most importantly the pnat plugin.

I'm running on an Ubuntu 16.04 LTS:

Code: Select all

 dpkg --status bluez | grep '^Version:'
Version: 5.37-0ubuntu5.1

And this version has a known bug on the pnat plugin:
https://bugs.debian.org/cgi-bin/bugrepo ... bug=690749

Disabling the pnat plugin fix this, by editing /etc/bluetooth/main.conf with

Code: Select all

DisablePlugins=pnat

All goes well now.

[kenand]

Hi!

I have miflora and mija LCD sensor also. I have pi zerow
Miflora works well, but I hav eproblrm with LCD sensor

My script values aren´t displayed on the sensors themselfs in Domoticz.

Script run, I see data:
1: updating
Characteristic value/descriptor read failed: Request attribute has encountered an unlikely error
Mi Sensor: 4C:65:A8:DC:53:82
Firmware: 00.00.66
Name: MJ_HT_V1
Temperature: 23.5°C
Humidity: 59.1%
Battery: 100%
http://192.168.1.123:8081/json.htm?type ... attery=100

my dummy sensor idx 35

I put to domoticz_mijia.py

print("\n1: updating")
update("4C:65:A8:DC:53:82","35")

Dummy sensor 35 do not show any data
And how can I ask humidity?

[kenand]

Solved. Miflora and mija also work my Raspberry PI zero W.
I have problem only pi zero w BT distance at now. If Miflora or Xiaomy LCD Humidity sensor more than 5 M from Pi Zero W, Pi can not read data through BT, It is very annoying. I have Gigagyte Brix with Xplenology and Home Assistant at same place than Pi zero, and Brix BT card receives data from Xiaomi BT sensors. (I have problem only with Symology+Domoticz+Miflora/mijia temp, because I can not compile bluez with Synology.

[nigels0]

I found that I was having the same problem connecting until I noticed that the domoticz port was set to 8000 in the code, where mine is the normal 8080.

Every now and again though I get the 107 error.

[glory50]

Hello everyone!

I have a sort of strange problem. My Domoticz runs on an old Dell laptop that has built-in BT device hci0, unfortunately, v.2.0 or 3.0 that is not supported by Xiaomi Thermostat. I bought a 4.0 dongle and it is recognized as hci1 and can scan the thermostat and show the name and the MAC. But when I run the script, I get an error:

1: updating
connect: No route to host (113)
connect: No route to host (113)
Error reading value retry after 5 seconds...
It's certainly connected to the BT stack issue as someone has already found connected with his Miflora: https://github.com/open-homeautomation/ ... -301239693

I took the hci0 down, but no help of it. Might it be that the first (and mostly only) BT device name is hardcoded?
Has anybody a suggestion?

BTW, gatttool gets a correct connection:

gatttool -b 4C:65:A8:DF:F8:BF --char-read -a 0x35
Characteristic value/descriptor: 08 36 00 10 00

[lwolf]

Xiaomi Mijia BLE Temperature and Humidity sensor with LCD is now supported in RPIEasy. Can be used either on a Raspberry PI with integrated Bluetooth or on a normal PC with a Bluetooth 4.0 dongle. (Plugin based on bluepy.)
https://github.com/enesbcs/rpieasy

[jorrit]

I have several of these devices. Now I encounter a problem. I don’t see the thermometer if I am further than 10m away. I have several gateways like this: https://www.google.be/amp/s/m.nl.aliexp ... 63913.html

Is there any way to read that signal on domoticz?