This Python library facilitates communication with Hoymiles DTUs and the HMS-XXXXW-2T HMS microinverters, utilizing protobuf messages.

For the Home Assistant integration have a look here: https://github.com/suaveolent/ha-hoymiles-wifi

Disclaimer: This library is not affiliated with Hoymiles. It is an independent project developed to provide tools for interacting with Hoymiles HMS-XXXXW-2T series micro-inverters featuring integrated WiFi DTU. Any trademarks or product names mentioned are the property of their respective owners.

The library was successfully tested with:

• Hoymiles HMS-800W-2T
• Hoymiles DTU WLite

$ pip install hoymiles-wifi

You can integrate the library into your own project, or simply use it in the command line.

hoymiles-wifi [-h] --host HOST [--as-json] <command>

commands:
    get-real-data-new,
    get-real-data-hms,
    get-real-data,
    get-config,
    network-info,
    app-information-data,
    app-get-hist-power,
    set-power-limit,
    set-wifi,
    firmware-update,
    restart-dtu,
    turn-on-inverter,
    turn-off-inverter,
    get-information-data,
    get-version-info,
    heartbeat,
    identify-dtu,
    identify-inverters

The `--as-json` option is optional and allows formatting the output as JSON.

from hoymiles_wifi.dtu import DTU
...
dtu = DTU(<ip_address>)
response = await dtu.<command>

if response:
    print(f"DTU Response: {response}")
else:
    print("Unable to get response!")

• async_get_real_data_new(): Retrieve real-time data
• async_get_real_data_hms(): Retrieve real-time data
• async_get_real_data(): Retrieve real-time data
• async_get_config(): Retrieve configuration information
• async_network_info(): Retrieve network information
• async_app_information_data(): Retrieve application information data
• async_app_get_hist_power(): Retrieve historical power data
• async_set_power_limit(power_limit): Set the power limit of the inverter (0-100%)
• async_set_wifi(wifi_ssid, wifi_password): Configure the wifi network
• async_firmware_update(): Update to latest firmware
• async_restart_dtu: Restart the DTU
• async_turn_on_inverter: Turn the inverter on
• async_turn_off_inverter: Turn the inverter off
• async_get_information_data: Retrieve information data
• async_heartbeat: Request a heartbeat message from the DTU

Please be aware of the following considerations:

• No DTU Implementation: This library retrieves information directly from the (internal) DTU of Hoymiles Wifi inverters.

Use this library responsibly and be aware of potential risks. There are no guarantees provided, and any misuse or incorrect implementation may result in undesirable outcomes. Ensure that your inverter is not compromised during communication.

Update Frequency: The library may experience limitations in fetching updates, potentially around twice per minute. The inverter firmware may enforce a mandatory wait period of approximately 30 seconds between requests.

Compatibility: While developed for the HMS-800W-2T inverter, compatibility with other inverters from the series is untested at the time of writing. Exercise caution and conduct thorough testing if using with different inverter models.

A special thank you for the inspiration and codebase to:

• DennisOSRM: hms-mqtt-publisher
• henkwiedig: Hoymiles-DTU-Proto