weewx-mqtt is a robust adapter for integrating Weewx with MQTT messaging, enabling seamless data ingestion from various ESP32 devices. This project simplifies the process of subscribing to MQTT messages, making it easier for users to collect and analyze environmental data from IoT devices.

Key Features

• Effortless Integration: Designed specifically for ease of use with ESP32 devices, allowing for quick setup and data collection.
• Real-time Data Handling: Supports real-time MQTT message handling to keep data up to date.

Example Packet

The following is a sample packet that demonstrates the format of the received data:

{  
  "time":"2025-04-06 04:43:04",  
  "model":"ESP32s",  
  "sequence_num":0,  
  "temperature_C":13.77,  
  "temperature_F":56.79,  
  "id":"66838BA28DCC",  
  "pressure_hPa":982.12,  
  "pressure_inHg":29.00191,  
  "altitude_m":262.4896,  
  "altitude_ft":861.1863
}

Example Configuration

To set up the MQTT driver, the following configuration file (mqtt.conf) can be used:

[MQTTDriver]
    host = mqtt.lan.kroy.io
    topic = rtl_433/analog/events
    poll_interval = 5
    driver = user.mqtt_driver
    usUnits = weewx.METRICWX  # Incoming data is in metric units

[ModelMappings]
    [[ESP32s]]
        # Target ESP32s with id 66838BA28DCC
        pressure = pressure_hPa.ESP32s.66838BA28DCC   # Pressure in hPa
        altitude = altitude_m.ESP32s.66838BA28DCC  # Altitude in m

This configuration allows users to specify the MQTT host, topic, and unit options for the incoming data, thereby tailoring the settings to their specific requirements.

The weewx-mqtt driver enhances the capabilities of Weewx by providing a straightforward method to gather data from MQTT sources, making it an essential tool for users looking to expand their meteorological data collection efforts.