Skip to content
Home Assistant TestFlight
Plum

Plum controller on LAZAR 15kW boiler with AliExpress RS485 WiFi adapter

Air Conditioners and Heaters · Climate

Not working

1 report: 1 says it doesn’t work.

Reported with 1 integration: Plum ecoMAX.

What people report

IntegrationIn Home AssistantIn Apple HomeWhat they saidSource
Plum ecoMAXNot workingConnection times out in config flow
Saved copy
Hello, I bought a new RS485 WIFI adapter: https://a.aliexpress.com/_Ewt5Prq But I can't connect it to the Plum Ecomax interface. I'm trying to connect it to my LAZAR 15kW boiler with a PLUM controller. What am I doing wrong? Thanks in advance for your help.

Excerpt saved from GitHub on 2026-10-23.

Issue #255 · 2025-10

Each row is one report from a GitHub thread, an integration’s docs, or r/homeassistant. Check the date and the linked source before you buy.

In ReReHome

Once Home Assistant’s HomeKit Bridge shares it, this device reaches Apple Home as a HomeKit accessory behind your Home Assistant bridge, so ReReHome shows and controls it like any other.

Identifiers

BrandPlum
CategoryAir Conditioners and Heaters