ESPHome components for MIoT devices

[dhewg]

Hey there,

I recently created a couple of components for my air purifier. Since they’re not limited to that appliance class, I hope they’re useful for others for all kinds of devices.

It’s a young project, so the currently tested device list is rather short, but I suspect there are many more devices on which these components can be used on.

@README.md

These ESPHome components are designed for MIoT devices which adhere to the Xiaomi MIoT Serial Communication protocol.

Such devices contain two microcontrollers, one actually controls the hardware, and the other acts as a LAN/cloud gateway.

These components allow you to replace the firmware on the latter, hence liberating your devices from the vendor cloud.

Check it out at

GitHub - dhewg/esphome-miot: ESPHome components for MIoT devices

[Mahko_Mahko]

Nice one. Thanks for sharing.

Are you aware of this? Is it similar? Edit: nevermind, I see the “Inspired By”…

[Link] Xiaomi Air Purifier 3/3H with custom ESPHome firmware

I thought this deserved a proper link in here since it is hard to find in searches. This is definitely reserved to tinkerers unafraid to take stuff apart (and potentially break stuff…) and with the know-how to flash a board with an adapter. The board is not especially easy to reach, and it’s easy to break connectors on your way there. Take extra care when it’s time for the side with the screen to come off (although I can confirm the device still works -flashing too- with the screen disconnected…

[dhewg]

@Mahko_Mahko

Nice one. Thanks for sharing.

Are you aware of this? Is it similar?

Yupp, I’m aware. In fact I used that for my device first, see the bottom of the README

But that one hardcodes the device specific SIIDs/PIIDs, so it’s not reusable, each device would need it’s own matching code and config. That and the fact that it relies on the deprecated custom components is why I started from scratch.

But it’s the project that inspired me to try to make it reusable, with the idea that new devices would only need a yaml config without any code changes. So far there’s a pet feeder and a rice cooker in the works, so it looks like it might work out, time will tell

[Mahko_Mahko]

Cool. Probably I’ll move over to you component sometime.

[Helge_K (Helge)]

@dhewg After having successfully flashed my Air Purifier 4 Lite with your ESPHome files I’ve now ordered a mi-smart-standing-fan-2 - Specifications - Mi Global Home - BPLDS02DM - dmaker.fan.p18 - Mi Smart Standing Fan 2 - 产品规格 - Xiaomi Miot Spec (miot-spec.com) - of which I’m confident that it will also use an ESP32 (someone already found out it seems: Esphome? · syssi/xiaomi_fan · Discussion #150 (github.com) )

I do have PCBite equipment which I have used to flash several ESP32 already (Yeelight ceiling lamps with the help of this great repository: syssi/esphome-yeelight-ceiling-light: ESPHome custom firmware for some Yeelight Ceiling Lights (github.com)). syssi also maintains this repository: syssi/xiaomi_fan: Xiaomi Mi Smart Fan integration for Home Assistant (github.com) but I really want to be cloud-free

Searching for esp32 mi fan - Google Search reveals a couple of more standing fan models with ESP32.

[vartom]

Hello. How to adapt your code for use with these types of miot commands?

down get_prop “power”, “mode”, “pm25”, “co2”, “temperature_outside”, “favourite_speed”, “control_speed”, “ptc_on”, “ptc_status”, “child_lock”, “sound”, “display”, “filter_intermediate”, “filter_inter_day”

<<< “get_prop “ptc_level”\r”
<<< “result “low”\r”

It looks like string parameter names are used instead of digital ssid piid.