CIRCUTOR CVM-BD Power Meter / Analyzer ESPHome Integration

The CVM-BD Power Meter is a programable measuring instrument supports RS485 Modbus Protocol communication.

Requirements

• ESP32 device with 320KB RAM, 4MB Flash and RS485 Adapter
• Recommended devices, with RS485 on board:
  • T-CAN485
  • KAmodESP32 POW RS485
  • any other ESP32 device with RS485 interface
• ESPhome
• HomeAssistant
• esphome should installed on your computer or HASS instance (ESPHome Builder)

ESP configuration

Example configuration in lilygo-jk0.yaml

lilygo-jk0.yaml - click here to expand

substitutions:
  modbus_contr_addr: "10"
  modbus_contr_id: cvm

esphome:
  name: esp32-s3
  friendly_name: ESP32-S3 ESP Circutor CVM-BD-RED
  platformio_options:
    build_flags: -DBOARD_HAS_PSRAM
    board_build.arduino.memory_type: qio_opi
    board_build.f_flash: 80000000L
    board_build.flash_mode: qio 

esp32:
  board: esp32-s3-devkitc-1
  framework:
    type: arduino

# Enable logging
logger:
    level: DEBUG
    # level: VERY_VERBOSE


# Enable Home Assistant API
api:
  encryption:
    key: "<your_generated_key>"

ota:
  - platform: esphome
    password: "<your_ota_password>"

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  power_save_mode: none

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "esp32-S3  Fallback Hotspot"
    password: "<your_hotspot_password>"

captive_portal:

time:
  - platform: homeassistant
    id: homeassistant_time
 
uart:
  id: mod_uart
  tx_pin: GPIO43
  rx_pin: GPIO44
  baud_rate: 19200
  stop_bits: 1
  rx_buffer_size: 512
  debug:
#    direction: BOTH
#    dummy_receiver: false
#    after:
#      delimiter: "\n"
#    sequence:
#      - lambda: UARTDebug::log_string(direction, bytes);
#      - lambda: UARTDebug::log_hex(direction, bytes);

modbus:
  flow_control_pin: GPIO9
  id: modbus1
  uart_id: mod_uart

modbus_controller:
  - id: ${modbus_contr_id}
    address: ${modbus_contr_addr}
    modbus_id: modbus1
    setup_priority: -10
    update_interval: 1s
    command_throttle: 75ms

sensor: !include ./include/cvm-bd.yaml
text_sensor: !include ./include/cvm-bd-t.yaml

Known issues

TO DO

Licence

Apache License, Version 2.0

References

• https://gitlab.stn.pl/picoides-monitor/power_meter/circutor_cvm-bd