ESPHome as an ble gateway

[plesetsk]

Hi,

thanks for you code.

Since my HA installed on Hyper-v I have no access to bluetooth on the host.
I am trying to use ESPHome as a gateway for command but it seems that I have to configure it in the way to send ble advertise message.
I do not know how to do it.
May be some one can help me on this.
Thanks.

[manymuch]

I believe it is possible now, and you can refer to here and here.
It may require some serious coding to get it work, but I don't have any esp device at hand currently.

[plesetsk]

Hi @manymuch
Thanks.

Here is my solution for ESPHome

esp32_ble:
  id: ble 

esp32_ble_server:

button:
  - platform: template
    name: Xgimi_ON
    id: xgimi_on

    # Optional variables:
    icon: "mdi:projector"
    on_press:
      then:
        - lambda: |-

            uint8_t manufacturer_data[] = {0x46, 0x00, 0x0f, 0x26, 0xc2, 0xdf, 0x3a, 0xef, 0x18, 0xff, 0xff, 0xff, 0x30, 0x43, 0x52, 0x4b, 0x54, 0x4d};
            uint8_t manufacturer_data_rem[] = {0x46, 0x00};
            // Convert manufacturer_data_set to std::vector<uint8_t>
            std::vector<uint8_t> manufacturer_data_vector(manufacturer_data, manufacturer_data + sizeof(manufacturer_data));

            id(ble).advertising_set_manufacturer_data(manufacturer_data_vector);
                 
            id(ble).advertising_start();
            delay(5000);
            std::vector<uint8_t> manufacturer_data_vector_rem(manufacturer_data_rem, manufacturer_data_rem + sizeof(manufacturer_data_rem));

            id(ble).advertising_set_manufacturer_data(manufacturer_data_vector_rem);
         
          
            id(ble).advertising_start();

[helgek]

Looking forward to test this once implemented. My experience with bluetooth stick wasn't good but since I set up an ESPHome bluetooth proxy device I already had good experience with the HA SwitchBot integration. If the bluetooth proxy device could be used for turning my projector on as well this would be really cool. Thanks both!

[helgek]

Maybe the SwitchBot integration can also serve as a reference regarding how to send bluetooth commands through ESP32 / ESPHome Bluetooth Proxy device: https://github.com/home-assistant/core/tree/dev/homeassistant/components/switchbot

All references with "bluetooth": https://github.com/search?q=repo%3Ahome-assistant%2Fcore+path%3A%2F%5Ehomeassistant%5C%2Fcomponents%5C%2Fswitchbot%5C%2F%2F+bluetooth&type=code

[wxyj1234]

你好@manymuch 谢谢。

这是我的 ESPHome 解决方案

manufacturer_data_vector ???

[Drafteed]

@plesetsk Thanks for the solution. I slightly changed the snippet so that it does not block ESPHome due to delay in the lambda function, which causes the system to completely freeze. I also added a few iterations of how the original remote does it. Now the code works fine, even at a very large distance from the projector.

esp32:
  framework:
    type: esp-idf

esp32_ble:
  id: ble 

esp32_ble_server:

button:
  - platform: template
    name: XGIMI Projector Wakeup
    icon: "mdi:projector"
    on_press:
      - repeat:
          count: 3
          then:
            - lambda: |-
                std::vector<uint8_t> data = {0x46, 0x00, 0xe7, 0x12, 0x97, 0x30, 0x35, 0xf2, 0x78, 0xff, 0xff, 0xff, 0x30, 0x43, 0x52, 0x4b, 0x54, 0x4d};
                id(ble).advertising_set_manufacturer_data(data);
            - delay: 1s
            - lambda: |-
                std::vector<uint8_t> data = {0x46, 0x00};
                id(ble).advertising_set_manufacturer_data(data);
            - delay: 1s

[plesetsk]

@Drafteed I have just tested your code in my environment and it works perfect. Thanks!

[helgek]

Thank you! Do I understand it right that this code requires a dedicated ESP32 device which only serves for this command? The SwitchBot integration uses any ESP32 Bluetooth Proxy device set up in ESPHome and works for various BLE commands, so it acts like a bluetooth stick which is not limited to one command. I was just wondering if the advertising command could also be sent through the ESP32 Bluetooth Proxy device? Then the manufacturer code set in the XGIMI remote configuration could be used and no additional ESP32 device would be required.

[Drafteed]

Thank you! Do I understand it right that this code requires a dedicated ESP32 device which only serves for this command?

I don't know if it's possible to send advertising command through bluetooth_proxy, but you can use command to wake up XGIMI with bluetooth_proxy together on one ESP32 device without any problems:

esp32:
  framework:
    type: esp-idf

# Enable BLE
esp32_ble:
  id: ble 

# Enable BLE Server
esp32_ble_server:

# Enable Bluetooth Proxy
bluetooth_proxy:

button:
  - platform: template
    name: XGIMI Projector Wakeup
    icon: "mdi:projector"
    on_press:
      - repeat:
          count: 3
          then:
            - lambda: |-
                std::vector<uint8_t> data = {0x46, 0x00, 0xe7, 0x12, 0x97, 0x30, 0x35, 0xf2, 0x78, 0xff, 0xff, 0xff, 0x30, 0x43, 0x52, 0x4b, 0x54, 0x4d};
                id(ble).advertising_set_manufacturer_data(data);
            - delay: 1s
            - lambda: |-
                std::vector<uint8_t> data = {0x46, 0x00};
                id(ble).advertising_set_manufacturer_data(data);
            - delay: 1s

[helgek]

@Drafteed Thank you for the great hint! It works indeed, I have now a working BT Proxy and the working wakeup command running on the same ESP device. Thank you again!

[helgek]

It seems that instead of hard coding the advertising data it could also be provided e.g. by the XGIMI Remote integration, e.g.: https://community.home-assistant.io/t/how-to-pass-a-variable-from-home-assistant-front-end-to-esphome/183845/23 and https://schinckel.net/2021/01/24/esphome-variables-from-home-assistant/

I will certainly further look into this myself later, just wanted to also share this.

[fahlsen]

Any luck with making this work with ESPHome to turn on a XGIMI Hirizon Ultra that need poweron as a bluetooth advertising command?

[helgek]

@fahlsen you need to figure out the advertising command code for your device e.g. using an iPhone/iPad with this app: https://apps.apple.com/us/app/bluetooth-smart-scanner/id509978131 . Please note: You should disconnect the projector from power so that when you repeatedly press the power button on the remote the advertising code remains active. Otherwise the remote will switch into HID paired device mode once the projector has powered on.

This is my ESPHome yaml to use one ESP32 device both as a Bluetooth Proxy device (to control SwitchBot curtain motors) and BLE WakeUp device for my XGIMI Elfin:

substitutions:
  name: esp32-bluetooth-proxy-ble-wake
  friendly_name: Bluetooth Proxy and BLE XGIMI Elfin Projector Wakeup ESP32
#packages:
#  esphome.bluetooth-proxy: github://esphome/firmware/bluetooth-proxy/esp32-generic.yaml@main
esphome:
  name: ${name}
  name_add_mac_suffix: false
  friendly_name: ${friendly_name}
api:
 # encryption:
  #  key: 

logger:
ota:

esp32:
  board: esp32dev
  framework:
    type: esp-idf

# Enable BLE
esp32_ble:
  id: ble 

# Enable BLE Server
esp32_ble_server:

esp32_ble_tracker:
  scan_parameters:
    # We currently use the defaults to ensure Bluetooth
    # can co-exist with WiFi In the future we may be able to
    # enable the built-in coexistence logic in ESP-IDF
    active: true

bluetooth_proxy:
  active: true


button:
  - platform: template
    name: XGIMI Projector Wakeup
    icon: "mdi:projector"
    on_press:
      - repeat:
          count: 3
          then:
            - lambda: |-
                std::vector<uint8_t> data = {0x46, 0x00, 0x7e, 0x31, 0xdb, 0x31, 0xb2, 0x24, 0x40, 0xff, 0xff, 0xff, 0x30, 0x43, 0x52, 0x4b, 0x54, 0x4d};
                id(ble).advertising_set_manufacturer_data(data);
            - delay: 1s
            - lambda: |-
                std::vector<uint8_t> data = {0x46, 0x00};
                id(ble).advertising_set_manufacturer_data(data);
            - delay: 1s       
  - platform: safe_mode
    name: Safe Mode Boot
    entity_category: diagnostic

# ELFIN CODE: 7e 31 db 31 b2 24 40 ff ff ff 30 43 52 4b 54 4d

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password