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WIFI Adapter Home Assistant Version Setup Guide

This is an optional guide for users who want to connect the WiFi adapter to Home Assistant in parallel with MEL Pump App. If you only use MEL Pump App, you can skip these steps and follow the standard setup guide.

info Before You Start

  • arrow_right Complete the standard WiFi adapter setup first so that the device is connected to your WiFi and working with MEL Pump App.
  • arrow_right You can run the adapter in any combination with or without MelPump and with or without Home Assistant.
  • arrow_right A working Home Assistant installation with an MQTT broker (e.g. Mosquitto) is required.

1 Download the Home Assistant Firmware

  1. 1 Download the latest Home Assistant firmware from github.com/F1p/Mitsubishi-CN105-Protocol-Decode.
  2. 2 This model is the Generation 2. Pick the firmware file named ECODAN_Bridge_Gen2_v6.x.x.bin.

2 Flash the Firmware on the Adapter

  1. 1 If the device is already connected to your WiFi, you may need to restart it first with a short press of the button around the LED.
  2. 2 Open the configuration page at http://heatpump.local or http://deviceIP.
  3. 3 Select Update, choose the downloaded firmware file and run the update.
  4. 4 Wait for the device to reboot before continuing.

3 Check Primary and Configure Secondary MQTT

  1. 1 Return to the device configuration page after the reboot completes.
  2. 2 Fill in the Primary MQTT section with the MEL Pump App broker details:

Primary MQTT (MEL Pump App)

Primary MQTT Server
mqtt.melpump.com
Primary MQTT Username
Username from your MEL Pump App MQTT integration
Primary MQTT Password
Password from your MEL Pump App MQTT integration
Primary MQTT Server Port
Leave the default value
Primary MQTT Base Topic
Must be the same as the Device ID
  1. ! Important: the Primary MQTT Base Topic must be equal to the Device ID for MEL Pump App to work correctly. Device ID is unique adapter serial number visible on the bottom of the configuration page.
  2. 4 Scroll down to the Optional Secondary MQTT Server section and enter your Home Assistant details:
Secondary MQTT Server
homeassistant.local
Secondary MQTT Username
your_ha_username
Secondary MQTT Password
your_ha_password
Secondary MQTT Server Port
1883
Secondary MQTT Base Topic
Ecodan/ASHP

Replace the username and password with the credentials of your Home Assistant MQTT broker. If your broker is not reachable at homeassistant.local, use its IP address instead.

  1. 5 Leave the Device ID field unchanged unless you are replacing hardware.
  2. 6 Press Save. After a short moment, your Home Assistant details should populate and the device will start publishing data to both brokers.

4 Verify the Integration

  • check_circle The LED should still turn green once the adapter is connected to WiFi and MEL Pump App.
  • check_circle In Home Assistant, the Ecodan device should appear automatically via MQTT Discovery under the Ecodan/ASHP topic.
  • warning If the device does not appear in Home Assistant, double-check the broker host, port and credentials. MEL Pump App is not involved in the Home Assistant connection and cannot diagnose it.
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