Set clock over Bluetooth Proxy on LYWSD02 by Xiaomi (Bluetooth Temp, humidity, clock device)

rojexx · April 16, 2023, 9:55am

There are several stand-alone projects that will adjust the clock on the LYWSD02
by Xiaomi. The device is recognised by HA but only as a set of sensors.
The clock drifts quite quickly and it would be good to sync the clock over Bluetooth via a proxy.
Example projects:

https://saso5.github.io/LYWSD02-clock-sync/

hwinkel · November 4, 2023, 9:52pm

I have just Installed the ESPhome Solution for that, but you right having this from HA via BT Proxy in the house would be better

github.com/esphome/feature-requests

Set clock on Xiaomi LYWSD02

opened 09:07PM - 17 Mar 20 UTC

kain

integration: ble_client

**Describe the problem you have/What new integration you would like** Synchronize clock on Xiaomi BLE Thermometer LYWSD02 Model via SNTP **Please describe your use case for this integration and alternatives you've tried:** Before you can use this device you must setup it using smartphone and official app to setup clock and timezone. But if this FR will be implemented this step can be skipped. After adding device to ESPhome it can be synced via SNTP and get timezone automatically (from HomeAssistant or configured in YAML via options). **Additional context** Setting timezone can be skipped or forced to another value by supplying option in YAML config. My LYWSD02 clock drift to +1 minute in 1 month, so periodical SNTP syncing would be good too. Syncing frequency can be set in YAML option too. I found working code to set clock and timezone for this device at Mikhail Baranov's github: https://github.com/h4/lywsd02

rojexx · November 8, 2023, 11:50am

What is the ESPhome solution for this?

hwinkel · November 8, 2023, 8:21pm

@rojexx the link is the post.

ashald · December 10, 2023, 7:29am

Had the same issue and quickly hacked together a HomeAssistant integration to do that - see GitHub - ashald/home-assistant-lywsd02: A customer component for HomeAssistant to configure LYWSD02. It adds a new service that can be invoked via any automation to set time on any given LYWSD02.

rojexx · December 10, 2023, 9:09am

Thanks for this!
Is there a way to get this merged with the main code for the device?

ashald · December 10, 2023, 1:43pm

I’ve see few HA integrations supporting it - did you mean a specific one?

Generally speaking, I doubt I will have time to contribute it to any other integrations is it’s good enough for me as it is, but you could reach out to those integration owners and point them to this thing and ask if they would be willing to take it in.

aroberts · May 19, 2024, 7:48pm

@ashald is your integration/service designed to be able to set a LYWSD02 that’s only visible to HA via bluetooth proxies? When I call the service with one of my clock’s MACs, I get “not found” in the logs:

2024-05-19 15:42:30.001 ERROR (MainThread) [custom_components.lywsd02] Could not find '17:29:XX:XX:6C:BE'.

Edit: I’ll add that I’m running HA core in docker, with no BT/BLE capabilities exposed to the container. My (minimal) Bluetooth functionality operates only through hardwired Shelly wifi devices that act as bluetooth proxies.

klim123123 · October 8, 2024, 4:49pm

exactly the same problem here.
Could not find ‘mac_here’.
it worked for 1 device, before i updated to 2024.10.1

Trigun1 · November 7, 2024, 8:33am

Hi All,

Perhaps a stupid question but I am facing the same issue with the time of this device.
I tried the solution provided but so far no luck.
therefor a quick check.
am I doing this right it the following automation?

alias: "Set time bathroom Clock "
description: ""
triggers:
  - trigger: sun
    event: sunrise
    offset: 0
conditions: []
actions:
  - action: lywsd02.set_time
    data:
      mac: "XX:XX:XX:XX:XX:XX"
mode: single

thanks in advance!