HomeAssisant Intergration

[Next9999]

Hello

Do you plan or think that it could be integrated with Home Assistant?

[KrystianD]

Hi @Next9999,

Integration with HA can be done using MQTT or by configuring esphome project for use with HA.

[Next9999]

Hello

i am new to HA, look like i need to purchase a ESP32 for that

Andre

[Next9999]

ESp8266 install working with a simple thermometer dht11

Any hint on how should the BM2 be integrated in Home Assistant

Thks

[Next9999]

i have copy/modify the yaml as bellow, when i run it the log only give this

Any help would apreaciated

INFO Reading configuration /config/esphome/bm2.yaml...
INFO Starting log output from esphome/bm2/debug
INFO Connected to MQTT broker!
INFO Successfully reconnected to the MQTT server
INFO Connected to MQTT broker!
INFO Successfully reconnected to the MQTT server

====================================
esphome:
name: bm2

includes:

- include.h

#include "mbedtls/aes.h"

esp32:
board: nodemcu-32s
framework:
type: arduino

logger:
level: INFO

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

mqtt:
broker: !secret mqtt_hostname
discovery: false
topic_prefix: esphome/bm2

web_server:
port: 80

esp32_ble_tracker:

ble_client:

• mac_address: !secret bm2_mac
  id: bm2_battery_meter

sensor:

• platform: ble_client
  ble_client_id: bm2_battery_meter
  name: Car_Voltage
  service_uuid: 'fff0'
  characteristic_uuid: 'fff4'
  unit_of_measurement: 'V'
  accuracy_decimals: 2
  state_class: measurement
  device_class: voltage
  force_update: true
  expire_after: 5min
  notify: true
  lambda: |-
  mbedtls_aes_context aes;
  mbedtls_aes_init(&aes);
  unsigned char output[16];
  unsigned char key[16] = { 108, 101, 97, 103, 101, 110, 100, 255, 254, 49, 56, 56, 50, 52, 54, 54, };
  unsigned char iv[16] = {};
  mbedtls_aes_setkey_dec(&aes, key, 128);
  mbedtls_aes_crypt_cbc(&aes, MBEDTLS_AES_DECRYPT, 16, iv, (uint8_t*)&x[0], output);
  mbedtls_aes_free(&aes);
  return ((output[2] | (output[1] << 8)) >> 4) / 100.0f;

[adrianmihalko]

Here is how I integrated without mqtt with ESP32: https://community.home-assistant.io/t/bm2-battery-monitoring-using-ble-tracker-component/408865/11?u=madrian

Thanks for the great solution.

[Next9999]

i spend a lot of time... on this :-( Any help would be appreciated... i really like to add BM2 to my Motorhome dashboard