Xiaomi Mijia Temperature and Humidity Sensor

硬體規格 
 
 名稱：小米藍芽溫溼度計 
 型號：LYWSD03MMC 
 
 Raspberry Pi OS 
 藍芽 
 不需要與溫濕度計做配對，就可以直接讀資料。 
 bluetoothctl
> scan on
> devices
> scan off
> exit 
 安裝 Python module 
 NOTE: 新版 Pi OS 只允許在 Python venv 環境下用 pip 安裝第三方套件。 
 # 以下指令必須用 user 帳號下執行 (non-root)
mkdir mitemp
cd mitemp
python -m venv env
source env/bin/activate
which python
# 記得先升級 pip 至最新版
pip install --upgrade pip
# 開始安裝套件
sudo apt install libglib2.0-dev
pip install bluepy
pip install lywsd03mmc
pip install paho-mqtt 
 錯誤：ERROR: Could not build wheels for bluepy, which is required to install pyproject.toml-based projects 
 解決： 
 sudo apt install libglib2.0-dev 
 Telegraf 
 Option 1: Python script 
 建立設定檔 
 mv /etc/telegraf/telegraf.conf /etc/telegraf/telegraf.conf.orig
telegraf --input-filter exec --output-filter influxdb_v2 config > /etc/telegraf/telegraf.conf 
 telegraf.conf 
 [[outputs.influxdb_v2]]
 urls = ["http://127.0.0.1:8086"]

 ## Token for authentication.
 token = "YOUR-TOKEN"
 ## Organization is the name of the organization you wish to write to.
 organization = "YOUR-ORAG"
 ## Destination bucket to write into.
 bucket = "YOUR-BUCKET"

 ## Timeout for HTTP messages.
 timeout = "5s"

[[inputs.exec]]
 interval = "180s"
 commands = ["sudo -u pi /home/pi/mitemp/env/bin/python /home/pi/mitemp/go-mitemp.py"]

 ## Timeout for each command to complete.
 timeout = "30s"

 ## Data format to consume.
 ## Each data format has its own unique set of configuration options, read
 ## more about them here:
 ## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
 data_format = "influx" 
 Test the configuration 
 telegraf -config /etc/telegraf/telegraf -test 
 Set the sudo for telegraf 
 NOTE: Pi OS 的 telegraf 服務是用 non-root 帳號啟動，如果要執行另一個帳號的 script，必須使用 sudo。 
 Edit: /etc/sudoers.d/011_telegraf-nopasswd 
 telegraf ALL=(ALL) NOPASSWD: /home/pi/mitemp/env/bin/python /home/pi/mitemp/go-mitemp.py 
 
 Option 2: MQTT Consumer 
 
 Plugin: telegraf/plugins/inputs/mqtt_consumer/README.md at release-1.29 · influxdata/telegraf (github.com) 
 MQTT Broker 伺服器 Mosquitto 安裝、帳號密碼、加密傳輸設定教學與範例 - Office 指南 
 
 Tutorials 
 
 pip: LYWSD03MMC 
 制霸 IoT 30Day！ Day 18 藍芽溫濕度計使用 
 Xiaomi Mijia Hygrothermo v2 sensor data on Raspberry Pi 
 Custom firmware for the Xiaomi Thermometer LYWSD03MMC 
 Home Asssistant Xiaomi Mijia LYWSD03MMC Temperature and Humidity Sensor Tutorial September 2022 
 Xiaomi Mijia Temperature, and Humidity Dashboard 
 How to Use Bluetooth on Raspberry Pi: GUI & Command Guide – RaspberryTips