Deleted MQTT entities still present in HA UI - how to delete? Newbie needs help

[matsrosenberg]

I’m new to MQTT, not a skilled programmer, and would appreciate some help with the following problem:

I’ve integrated an Arduino board via LAN/MQTT using Mosquitto. Setting up the device and entities works well, but when I change the entities, old entities (for which there is no push anymore) still remain visible in HA, and sometimes mess up with the new configurations. How can I remove old entities?

• Is there a config file someplace where I can delete it? Haven’t found it.
• Can I run some sort of script at HA startup which cancels all MQTT devices. Not ideal solution though.

The only way that I have resolved this so far has been through restoring old backups, but this is not feasible going forward.

Many thanks for your help!!!

[FloatingBoater (James Derrick)]

Hi Mats,

There are several posts on this forum discussing writing custom MQTT clients with auto-discovery - search is your friend.

Here’s a link which has a selection…

MQTT Discovery Setup

Hi, Does the state change if you strip the code back to the basics in a test harness? e.g. Remove the units and class to test getting a raw number from the JSON via the Jinja template? Publish a test payload without totalTime to simplify the JSON? Have you double checked the payload in MQTT Explorer to avoid any confusion between total_energy and totalEnergy? I’ve posted a few examples and dev cycle tips on HASS Discovery in the past, but suspect this is more about parsing the JSON: I…

TL;DR

• Install MQTT Explorer and connect to your broker
• Delete retained HASS MQTT Discovery topic homeassistant/sensor/thing or homeassistant/switch/thing (newer Tasmota kit uses tasmota/discovery/uid/), and HA will change immediately.
• Look up what retained messages are in MQTT.
• Try protoyping using mosquitto_pub

Tasmota MQTT Device "not available"

Hi, I suspect you’ve already done the checks I’d usually reccomend, but just in case, here’s a basic check-list: New installs of Tasmota should default to SetOption19 0, and you’ve already implied the HASS Tasmota integration is installed and was probably working. If you are confident with MQTT Explorer, there’s three parts to HA - the published Tasmota Discovery properties, the cmnd/ topic to change state, and the tele/ reply with the actual state. Greyed out entities suggest the Discover…

If this helps, this post!