Integrating Atorch DT20HBW with Home Assistant - advice needed.

Question

Hello (my first topic- don't throw rocks) I need to integrate one device in Home Assistant, the device name is Atorch DT20HBW: I was able to identify some of its chips: -CB2S -RN8209C -CH582M I see also some available solder connections on the PCB: V / G / D- / D and PB22(?) Can someone please...

divadiow · Accepted Answer

good luck. don't forget to take full backup before flashing

f3nix · Accepted Answer

Hi.
I have converted 3 pieces to esphome.


substitutions:
  name: dt20hbw-1
  friendly_name: dt20hbw-1
  device_description: "Monitor and control Atorch DT20HBW"

esphome:
  name: ${name}
  friendly_name: ${friendly_name}
  comment: ${device_description}
  project:
    name: "f3nix.esphome-dt20hbw"
    version: 0.9.2
  platformio_options:
      platform_packages:
      - framework-arduino-api @ https://github.com/f3nix/ArduinoCore-API#ringbuffer-buffer
  build_path: "../config/esphome/${name}_build"
 
bk72xx:
  board: cb2s
  framework:
    version: latest
    loglevel: debug

# Enable logging
logger:
  baud_rate: 0
  # level: VERY_VERBOSE

# Enable Home Assistant API
api:

ota:
  - platform: esphome

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

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "dt20hbw-1 Fallback Hotspot"
    password: !secret wifi_ap_password

captive_portal:

web_server:
  port: 80
  version: 3

time:
  - platform: homeassistant
    id: homeassistant_time

uart:
  tx_pin: TX1
  rx_pin: RX1
  baud_rate: 115200
  debug:
    direction: BOTH
    dummy_receiver: false

debug:
  update_interval: 30s

# Register the Tuya MCU connection
tuya:
  id: "tuyadevice"
  time_id: homeassistant_time

text_sensor:
  - platform: debug
    reset_reason:
      name: "Reset Reason"

  - platform: libretiny
    version:
      name: "LibreTiny Version"

sensor:
  - platform: uptime
    name: "Uptime"

  - platform: wifi_signal # Reports the WiFi signal strength/RSSI in dB
    name: "WiFi Signal dB"
    id: wifi_signal_db
    update_interval: 60s
    entity_category: "diagnostic"

  - platform: "tuya"
    name: "Current"
    sensor_datapoint: 18
    unit_of_measurement: "A"
    device_class: current
    state_class: measurement
    accuracy_decimals: 3
    filters:
      - multiply: 0.001

  - platform: "tuya"
    name: "Power"
    sensor_datapoint: 19
    unit_of_measurement: "W"
    device_class: power
    state_class: measurement
    accuracy_decimals: 2
    filters:
      - multiply: 0.01

  - platform: "tuya"
    name: "Voltage"
    sensor_datapoint: 20
    unit_of_measurement: "V"
    device_class: voltage
    state_class: measurement
    accuracy_decimals: 2
    filters:
      - multiply: 0.01

  - platform: "tuya"
    name: "Battery percentage"
    sensor_datapoint: 103
    unit_of_measurement: "%"
    device_class: battery
    state_class: measurement
    accuracy_decimals: 1
    filters:
      - multiply: 0.1

  - platform: "tuya"
    name: "NTC temperature"
    sensor_datapoint: 122
    unit_of_measurement: "°C"
    device_class: temperature
    state_class: measurement
    accuracy_decimals: 1
    filters:
      - multiply: 0.1

  - platform: "tuya"
    name: "CPU temperature"
    sensor_datapoint: 135
    unit_of_measurement: "°C"
    device_class: temperature
    state_class: measurement
    accuracy_decimals: 0

  - platform: "tuya"
    name: "Discharge current"
    sensor_datapoint: 111
    unit_of_measurement: "A"
    device_class: current
    state_class: measurement
    accuracy_decimals: 3
    filters:
      - multiply: 0.001

  - platform: "tuya"
    name: "Discharge power"
    sensor_datapoint: 112
    unit_of_measurement: "W"
    device_class: power
    state_class: measurement
    accuracy_decimals: 3
    filters:
      - multiply: 0.001

  - platform: "tuya"
    name: "Total electricity"
    sensor_datapoint: 123
    unit_of_measurement: "kWh"
    device_class: energy
    state_class: measurement
    accuracy_decimals: 3
    filters:
      - multiply: 0.001

  - platform: "tuya"
    name: "Total capacity"
    sensor_datapoint: 133
    unit_of_measurement: "Ah"
    device_class: energy
    state_class: measurement
    accuracy_decimals: 3
    filters:
      - multiply: 0.001

  - platform: "tuya"
    name: "Resistance"
    sensor_datapoint: 134
    unit_of_measurement: "Ω"
    state_class: measurement
    accuracy_decimals: 2
    filters:
      - multiply: 0.01

switch:
  - platform: "tuya"
    name: "Real time data refresh switch"
    switch_datapoint: 101

  - platform: "tuya"
    name: "Relay switch"
    switch_datapoint: 102

  - platform: "tuya"
    name: "Data zero"
    switch_datapoint: 113
    id: data_zero
    on_turn_on:
      - delay: 100ms
      - switch.turn_off: data_zero

  - platform: "tuya"
    name: "Wi-Fi device reset"
    switch_datapoint: 114
    id: wifi_reset
    on_turn_on:
      - delay: 100ms
      - switch.turn_off: wifi_reset

  - platform: "tuya"
    name: "Factory reset"
    switch_datapoint: 115
    id: factory_reset
    on_turn_on:
      - delay: 100ms
      - switch.turn_off: factory_reset

  - platform: "tuya"
    name: "Exit device backend"
    switch_datapoint: 116
    id: backend
    on_turn_on:
      - delay: 100ms
      - switch.turn_off: backend

# button:
#   - platform: template
#     name: "Data zero"
#     on_press:
#       - lambda: |-
#           id(tuyadevice).set_boolean_datapoint_value(113, true);
#           id(tuyadevice).set_boolean_datapoint_value(113, false);

#   - platform: template
#     name: "Wi-Fi device reset"
#     on_press:
#       - lambda: |-
#           id(tuyadevice).set_boolean_datapoint_value(114, true);
#           id(tuyadevice).set_boolean_datapoint_value(114, false);

#   - platform: template
#     name: "Factory reset"
#     on_press:
#       - lambda: |-
#           id(tuyadevice).set_boolean_datapoint_value(115, true);
#           id(tuyadevice).set_boolean_datapoint_value(115, false);

#   - platform: template
#     name: "Exit device backend"
#     on_press:
#       - lambda: |-
#           id(tuyadevice).set_boolean_datapoint_value(116, true);
#           id(tuyadevice).set_boolean_datapoint_value(116, false);

number:
  - platform: tuya
    name: "Display brightness"
    number_datapoint: 108
    min_value: 1
    max_value: 9
    step: 1
    entity_category: config

  - platform: tuya
    name: "Standby brightness"
    number_datapoint: 109
    min_value: 0
    max_value: 9
    step: 1
    entity_category: config

  - platform: tuya
    number_datapoint: 110
    name: "Standby time"
    unit_of_measurement: "s"
    min_value: 3
    max_value: 99
    step: 1
    mode: box
    entity_category: config
 
  - platform: tuya
    name: "Over voltage protection"
    number_datapoint: 104
    unit_of_measurement: "V"
    min_value: 0.00
    max_value: 420.00
    multiply: 100
    step: 1
    mode: box
    entity_category: config

  - platform: tuya
    name: "Over temperature protection"
    number_datapoint: 105
    unit_of_measurement: "°C"
    min_value: 0.1
    max_value: 150.0
    multiply: 10
    step: 1
    mode: box
    entity_category: config

  - platform: tuya
    name: "Over power protection"
    number_datapoint: 106
    unit_of_measurement: "W"
    min_value: 1
    max_value: 252000
    step: 1
    mode: box
    entity_category: config

  - platform: tuya
    name: "Low voltage protection"
    number_datapoint: 119
    unit_of_measurement: "V"
    min_value: 0.00
    max_value: 420.00
    multiply: 100
    step: 1
    mode: box
    entity_category: config

  - platform: tuya
    name: "100% battery voltage"
    number_datapoint: 117
    unit_of_measurement: "V"
    min_value: 0.00
    max_value: 450.00
    multiply: 100
    step: 1
    mode: box
    entity_category: config

  - platform: tuya
    name: "0% battery voltage"
    number_datapoint: 120
    unit_of_measurement: "V"
    min_value: 0.00
    max_value: 450.00
    multiply: 100
    step: 1
    mode: box
    entity_category: config

  - platform: tuya
    name: "Data refresh interval time"
    number_datapoint: 125
    unit_of_measurement: "s"
    min_value: 1
    max_value: 90
    step: 1
    mode: box
    entity_category: config

  - platform: tuya
    name: "Mini measure Amp"
    number_datapoint: 121
    unit_of_measurement: "mA"
    min_value: 2
    max_value: 99
    step: 1
    mode: box
    entity_category: config

select:
  - platform: tuya
    name: "Device language"
    enum_datapoint: 107
    optimistic: true
    options:
      0: "Chinese"
      1: "English"
    entity_category: config

  - platform: tuya
    name: "Device interface"
    enum_datapoint: 118
    optimistic: true
    options:
      0: "Front measurement interface"
      1: "Background setting interface"
      2: "Large font interface"
    entity_category: config

  - platform: tuya
    name: "Alarm sign"
    enum_datapoint: 132
    optimistic: true
    options:
      0: "off"
      1: "ovp"
      2: "lvp"
      3: "opp"
      4: "otp"
    entity_category: diagnostic

  - platform: tuya
    name: "Diverter size"
    enum_datapoint: 136
    optimistic: true
    options:
      0: "30A"
      1: "100A"
      2: "200A"
      3: "300A"
      4: "400A"
      5: "500A"
      6: "600A"
      7: "1000A"
    entity_category: config

.
Greetings,
Matthew

divadiow · Answer

It'd be the CB2S you'd focus on first. Have you checked out similar Atorch TuyaMCU devices in the device list for the approach taken with those?

pexicele · Answer

Thanks, in fact I just started reading those, I never flashed a tuya chip till now, luckily I have two of these DT20HBW devices.
At this moment one of them has a new isolated dc-dc attached (18-75v to 5v) and monitors the solar battery using tuya integration, refresh rate makes this solution almost unusable since I had to calculate SOC based on current sensor value.
From what I see in those tutorials is not that simple for me to identify all sensor data but someone has to do that so wish me luck.

pexicele · Answer

trillions of thanks Matthew, it is working on my devices !

markinNZ · Answer

Hi,I am new to flashing devices and so sorry if my question is simple. But can you please explain a basic overview of how I can flash ESPHome-dt20hbw to use ESPHome on this device? I have tried connecting the USB port on the device to both my HA server and Windows PC, but it seems to only see a HID device. Is there a way I can get it to load as a COM or ttyUSB port or I am doing it completely wrong and need to get a USB to TTL UART and solder it to the board? Perhaps I'm missing a step to put the board into download mode as using the factory method of holding down - button while powering on doesn't change anything.Thank you!Mark

pexicele · Answer

Hi MarkI had extracted the mini Wi-Fi Tuya module (located in a corner of the motherboard) and I programmed this module via serial-USB adapter (in my case an ESP01 USB programmer -modified)Good luckViorel

markinNZ · Answer

>>21629925 Thanks for your reply. Aha, it's as I had suspected. Probably more trouble than it's worth for me. But at least I'm not going down a dead-end path.

johnhowardlay · Answer

From what I’ve found, the DT20HBW comes with a relay switch add-on and works through Tuya, but it doesn’t seem to have direct support in Home Assistant. Some users mentioned trying TinyTuya for local control, while others went further and flashed it with ESPHome for full integration.
I’m curious to know:
Did you manage to get reliable data (voltage, current, power) into Home Assistant?
Were you able to control the relay locally without relying on the Tuya cloud?
If you flashed it, what chipset did you encounter (CB2S, RN8209C, CH582M) and what tools did you use?
Any YAML configs or working examples you can share?
My main goal is to track battery health, get a construction cost estimate for adding smart monitoring, and automate the relay based on voltage thresholds.

BartekElektro1 · Answer

Also, have a look at - here it is all beautifully put together, albeit for DL24/BW150, but I think it will be very similar...

Integrating Atorch DT20HBW with Home Assistant - advice needed.

How can I integrate an Atorch DT20HBW into Home Assistant, especially to monitor DC-side voltage, current, power, and battery data as a beginner?

Identify likely UART pads for Home Assistant integration

Identify likely UART pads for Home Assistant integration

Post #2

Tuya flashing needed for faster DT20HBW updates

Tuya flashing needed for faster DT20HBW updates

Post #4

Esphome config for three DT20HBW units

Esphome config for three DT20HBW units

Post #6

Need USB-to-TTL UART and download mode

Need USB-to-TTL UART and download mode

Post #8

Post #9

Clarifying Home Assistant integration and chipset options

Clarifying Home Assistant integration and chipset options

Post #11

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