noah-mqtt

noah-mqtt is a standalone application designed to retrieve data and metrics from your Growatt NOAH 2000 home battery used in balcony power plants. It publishes this information to an MQTT broker, making it easily accessible for Home Assistant or other applications.

The application features Home Assistant auto-discovery, allowing your NOAH devices to be automatically recognized and integrated with Home Assistant via the MQTT integration.

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Run the application standalone

Option 1: Running noah-mqtt with Docker

To run the latest version of noah-mqtt using Docker, follow these steps:

1. Install Docker: Ensure Docker is installed on your system. You can download Docker Desktop from Docker’s official website.

2. Open a Terminal:

   • Windows: Use Command Prompt or PowerShell.
   • Linux/macOS: Use the Terminal.

3. Execute the Docker Command: Run the following command, replacing the placeholders with your actual values:

   docker run --name noah-mqtt -e GROWATT_USERNAME=myusername -e GROWATT_PASSWORD=mypassword -e MQTT_HOST=localhost -e MQTT_PORT=1883 ghcr.io/mtrossbach/noah-mqtt:latest
   

• Replace myusername with your Growatt username.
• Replace mypassword with your Growatt password.
• Replace localhost with the hostname or IP address of your MQTT broker.
• Replace 1883 with the port number your MQTT broker uses (default is 1883).

The application will connect to your MQTT broker and retrieve all metrics and data for your NOAH devices.

Option 2: Downloading and running a prebuilt binary

If you prefer not to compile the binary yourself, you can download a prebuilt version:

1. Download the Binary: Go to the Releases page of the repository and download the prebuilt binary for your operating system and system architecture.

2. Extract the Binary: If the binary is compressed (e.g., in a zip or tar file), extract it to a directory of your choice.

3. Run the Application: Open a terminal in the directory containing the binary and run it using the appropriate command for your OS, setting the necessary environment variables:

   • Windows (Command Prompt):

     set GROWATT_USERNAME=myusername
     set GROWATT_PASSWORD=mypassword
     set MQTT_HOST=localhost
     set MQTT_PORT=1883
     noah-mqtt.exe

   • Windows (PowerShell):

     $env:GROWATT_USERNAME=„myusername“
     $env:GROWATT_PASSWORD=„mypassword“
     $env:MQTT_HOST=„localhost“
     $env:MQTT_PORT=„1883“
     .\noah-mqtt.exe

   • Linux/macOS:

     GROWATT_USERNAME=myusername GROWATT_PASSWORD=mypassword MQTT_HOST=localhost MQTT_PORT=1883 ./noah-mqtt

Again, replace myusername, mypassword, localhost, and 1883 with your actual Growatt account details and MQTT broker information.

Option 3: Compiling the binary yourself

To compile the binary yourself, ensure you have Go installed on your machine:

1. Install Go: Download and install the latest version of Go from the official Go website.

2. Clone the Repository: Open a terminal and run the following command to clone the repository:

    git clone https://github.com/mtrossbach/noah-mqtt.git
    cd noah-mqtt
   

3. Build the application:

    go build -o noah-mqtt cmd/noah-mqtt/main.go
   

Afterwards follow the instructions for running the application from option 2.

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Integration into HomeAssistant

Run standalone (Home Assistant Container, Home Assistant Core)

noah-mqtt interacts with Home Assistant by publishing data from your Growatt NOAH 2000 home battery to an MQTT broker. This setup allows Home Assistant to subscribe to and integrate this data seamlessly into its ecosystem.

If you’re already using MQTT with other integrations like zigbee2mqtt or AhoyDTU, you already have the MQTT integration configured and active. In this case, you can skip step 1 and 2 as your existing setup should work with noah-mqtt.

The following integration process for noah-mqtt with Home Assistant works for all installation methods, regardless of how Home Assistant is installed—whether it’s through Home Assistant OS, Home Assistant Supervised, or Home Assistant Container.

1. Set Up an MQTT Broker:
   Ensure you have an MQTT broker running, such as Mosquitto, and that it’s accessible from both Noah-mqtt and Home Assistant.

2. Check MQTT Integration in Home Assistant:

   • Navigate to Settings > Devices & Services in Home Assistant.
   • Click Add Integration and select „MQTT“.
   • Enter your MQTT broker details (hostname, port, username, password).
   • Test the connection to ensure it’s working correctly.

3. Run noah-mqtt:
   Start noah-mqtt using the appropriate configuration for your MQTT broker.

4. Verify Device Discovery:
   Check Devices and Entities under Settings > Devices & Services in Home Assistant to confirm that your Noah devices are automatically discovered.

By following these steps, noah-mqtt will communicate with Home Assistant via your MQTT broker, also supporting automatic device discovery. If you already have MQTT set up, it should integrate seamlessly with your existing configuration.

Run as Home Assistant add-on (Home Assistant OS, Home Assistant Supervised)

If you are using Home Assistant OS or Home Assistant Supervised you can run noah-mqtt as a Home Assistant add-on, which provides seamless integration with your Home Assistant setup. This option leverages the add-on system to manage and run noah-mqtt directly on your Home Assistant instance.

Steps to Use the Home Assistant Add-on

0. Prerequisite:

   • Have the Mosquitto Add-on installed and running -or- have a separate MQTT running
   • Home Assistant MQTT integration enabled

1. Add the Repository:

   • Open your Home Assistant web interface.
   • Navigate to Settings > Add-ons > Add-on Store.
   • Click on the three-dot menu in the top right corner and select Repositories.
   • Add the following URL: https://github.com/mtrossbach/hassio-addons.

2. Install the Add-on:

   • Search for the noah-mqtt add-on within the Add-on Store.
   • Click on the add-on and select Install.

3. Configure the Add-on:

   • After installation, configure the add-on settings by providing your Growatt username and Growatt password and setup the other options as needed.
   • If you do not use the Mosquitto Add-on, please also define your MQTT settings

4. Start the Add-on:

   • Click Start to launch the noah-mqtt add-on.

The Home Assistant add-on provides an easy and integrated way to run noah-mqtt, allowing you to manage it directly from the Home Assistant interface.

For more detailed information and updates, visit the repository.

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Configuration

You can configure noah-mqtt using the following environment variables:

Environment Variable	Description	Default
LOG_LEVEL	Sets the logging level of the application	INFO
POLLING_INTERVAL	Time in seconds between fetching new status data	10
BATTERY_DETAILS_POLLING_INTERVAL	Time in seconds between fetching battery details (per battery SoC & temperature).	60
PARAMETER_POLLING_INTERVAL	Time in seconds between fetching parameter data (system-output-power, charging limits).	60
GROWATT_USERNAME	Your Growatt account username (required)	-
GROWATT_PASSWORD	Your Growatt account password (required)	-
MQTT_HOST	Address of your MQTT broker (required)	-
MQTT_PORT	Port number of your MQTT broker	1883
MQTT_CLIENT_ID	Identifier for the MQTT client	noah-mqtt
MQTT_USERNAME	Username for connecting to your MQTT broker	-
MQTT_PASSWORD	Password for connecting to your MQTT broker	-
MQTT_TOPIC_PREFIX	Prefix for MQTT topics used by Noah-mqtt	noah2mqtt
HOMEASSISTANT_TOPIC_PREFIX	Prefix for topics used by Home Assistant	homeassistant

Adjust these settings to fit your environment and requirements.

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Data provided by noah-mqtt

Published Topics

The following MQTT topics are used by noah-mqtt to publish data:

1. General Device Data

• Topic: noah2mqtt/{DEVICE_SERIAL}
• Description: This topic contains general data about the device.
• Example: noah2mqtt/0ABC00AA15AA00AA
• Example Payload:

{
  "output_w": 398, // current output power in watts
  "solar_w": 102, // current solar generation power in watts
  "soc": 40, // current state of charge of the whole appliance
  "charge_w": 0, // current charging power in watts
  "discharge_w": 314, // current discharge power in watts
  "battery_num": 2, // number of batteries
  "generation_total_kwh": 319.8, // total energy generation
  "generation_today_kwh": 3.1, // engery generation today
  "work_mode": "load_first", // current work mode: load_first or battery_first
  "status": "online" // connectivity status: online or offline
}

2. Battery Information

• Topic: noah2mqtt/{DEVICE_SERIAL}/BAT{BAT_NR}
• Description: This topic contains information about the device's batteries. Replace {BAT_NR} with the battery number (e.g., BAT0, BAT1, BAT2, etc.).
• Example: noah2mqtt/0ABC00AA15AA00AA/BAT0
• Example Payload:

{
   "serial": "0ABC00AA15AA00AA", // battery serial number
   "soc": 42, // current state of charge of this battery
   "temp": 26 // current temperatur of this battery
}

3. Device Configuration

• Topic: noah2mqtt/{DEVICE_SERIAL}/parameters
• Description: This topic contains the current configuration parameters of the device.
• Example: noah2mqtt/0ABC00AA15AA00AA/parameters
• Example Payload:

{
   "charging_limit": 100, // battery charging limit in percent, between 70 and 100
   "discharge_limit": 9, // battery discharge limit in percent, between 0 and 30
   "output_power_w": 800 // system output power in watts, between 0 and 800 
}

Setting Device Configuration

You can update the device's configuration settings by posting a message to the following topic:

• Topic: noah2mqtt/{DEVICE_SERIAL}/parameters/set
• Description: Send configuration settings to this topic to update the device's parameters.
• Note: If you want to change the charging limit you always have to set charging_limit and discharge_limit.
• Example: noah2mqtt/1234567890/parameters/set
• Example Payload:

{
   "charging_limit": 100, // battery charging limit in percent, between 70 and 100
   "discharge_limit": 9, // battery discharge limit in percent, between 0 and 30
   "output_power_w": 800 // system output power in watts, between 0 and 800 
}