48200-1101-10E-LN12-16S - 3 PACKS (1 master + 2 slaves) WORKING!

[idanny50]

Hello! I want to share my working setup:
I have 3 packs DIY BOXES - bms - 48200-1101-10E-LN12-16S, configured 1 as master and 2 as slave. I have connected esp32 with 2 RS485TTL, first RS485 connected to master on RS485 port to read the 2 slave unit and seccond RS485 connected also to master on CAN port on pin 1 and 2 (i separated the pins, pin1&2 connection to rs485 and other connected to inverter). All DIP switches are off, Automatic dip switch enable in all bms, connection made like in manual.
For reading master use baud rate 9600bps and for reading slaves use 19200bps.

All working ok till now.

esphome yaml:

substitutions:
  name: seplos
  battery_bank0: "${name} B0"
  battery_bank1: "${name} B1"
  battery_bank2: "${name} B2"
  device_description: "Monitor a Seplos BMS via RS485"
  external_components_source: github://syssi/esphome-seplos-bms@main
  tx_pin_uart0: GPIO5
  rx_pin_uart0: GPIO4
  tx_pin_uart1: GPIO33
  rx_pin_uart1: GPIO19

esphome:
  name: ${name}
  comment: ${device_description}
  project:
    name: "syssi.esphome-seplos-bms"
    version: 1.1.0

esp32:
  board: wemos_d1_mini32
  framework:
    type: esp-idf

external_components:
  - source: ${external_components_source}
    refresh: 0s

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

ota:

logger:
  level: DEBUG


# If you use Home Assistant please remove this `mqtt` section and uncomment the `api` component!
# The native API has many advantages over MQTT: https://esphome.io/components/api.html#advantages-over-mqtt
# mqtt:
#  broker: !secret mqtt_host
#  username: !secret mqtt_username
#  password: !secret mqtt_password
#  id: mqtt_client

api:

uart:
- id: uart_0
  baud_rate: 19200
  tx_pin: ${tx_pin_uart0}
  rx_pin: ${rx_pin_uart0}
  # The increased RX buffer size is important because
  # the full BMS response must fit into the buffer
  rx_buffer_size: 384
 
 
- id: uart_1
  baud_rate: 9600
  tx_pin: ${tx_pin_uart1}
  rx_pin: ${rx_pin_uart1}
  # The increased RX buffer size is important because
  # the full BMS response must fit into the buffer
  rx_buffer_size: 384

  debug:
    dummy_receiver: false
    direction: BOTH
    # after:
    #   delimiter: "\r"
    # sequence:
    #   - lambda: UARTDebug::log_string(direction, bytes);


seplos_modbus:
  - id: modbus0
    uart_id: uart_0
  - id: modbus1
    uart_id: uart_1

seplos_bms:
  - id: battery_bank0
    # Dip switch configuration of the first pack / address 0x01
    #  8    7    6    5    4    3    2   1
    # off, off, off, off, off, off, off, on
    address: 0x00
    # Known protocol versions: 0x20 (Seplos), 0x26 (Boqiang)
    protocol_version: 0x20
    seplos_modbus_id: modbus1
    update_interval: 2s
  - id: battery_bank1
    # Dip switch configuration of the second pack / address 0x02
    #  8    7    6    5    4    3   2    1
    # off, off, off, off, off, off, on, off
    address: 0x01
    # Known protocol versions: 0x20 (Seplos), 0x26 (Boqiang)
    protocol_version: 0x20
    seplos_modbus_id: modbus0
    update_interval: 2s
  - id: battery_bank2
    # Dip switch configuration of the third pack / address 0x03
    #  8    7    6    5    4    3   2   1
    # off, off, off, off, off, off, on, on
    address: 0x02
    # Known protocol versions: 0x20 (Seplos), 0x26 (Boqiang)
    protocol_version: 0x20
    seplos_modbus_id: modbus0
    update_interval: 2s

sensor:
  - platform: seplos_bms
    seplos_bms_id: battery_bank0
    min_cell_voltage:
      name: "${battery_bank0} min cell voltage"
    max_cell_voltage:
      name: "${battery_bank0} max cell voltage"
    min_voltage_cell:
      name: "${battery_bank0} min voltage cell"
    max_voltage_cell:
      name: "${battery_bank0} max voltage cell"
    delta_cell_voltage:
      name: "${battery_bank0} delta cell voltage"
    average_cell_voltage:
      name: "${battery_bank0} average cell voltage"
    cell_voltage_1:
      name: "${battery_bank0} cell voltage 1"
    cell_voltage_2:
      name: "${battery_bank0} cell voltage 2"
    cell_voltage_3:
      name: "${battery_bank0} cell voltage 3"
    cell_voltage_4:
      name: "${battery_bank0} cell voltage 4"
    cell_voltage_5:
      name: "${battery_bank0} cell voltage 5"
    cell_voltage_6:
      name: "${battery_bank0} cell voltage 6"
    cell_voltage_7:
      name: "${battery_bank0} cell voltage 7"
    cell_voltage_8:
      name: "${battery_bank0} cell voltage 8"
    cell_voltage_9:
      name: "${battery_bank0} cell voltage 9"
    cell_voltage_10:
      name: "${battery_bank0} cell voltage 10"
    cell_voltage_11:
      name: "${battery_bank0} cell voltage 11"
    cell_voltage_12:
      name: "${battery_bank0} cell voltage 12"
    cell_voltage_13:
      name: "${battery_bank0} cell voltage 13"
    cell_voltage_14:
      name: "${battery_bank0} cell voltage 14"
    cell_voltage_15:
      name: "${battery_bank0} cell voltage 15"
    cell_voltage_16:
      name: "${battery_bank0} cell voltage 16"
    temperature_1:
      name: "${battery_bank0} temperature 1"
    temperature_2:
      name: "${battery_bank0} temperature 2"
    temperature_3:
      name: "${battery_bank0} temperature 3"
    temperature_4:
      name: "${battery_bank0} temperature 4"
    temperature_5:
      name: "${battery_bank0} environment temperature"
    temperature_6:
      name: "${battery_bank0} mosfet temperature"
    total_voltage:
      name: "${battery_bank0} total voltage"
    current:
      name: "${battery_bank0} current"
    power:
      name: "${battery_bank0} power"
    charging_power:
      name: "${battery_bank0} charging power"
    discharging_power:
      name: "${battery_bank0} discharging power"
    residual_capacity:
      name: "${battery_bank0} residual capacity"
    battery_capacity:
      name: "${battery_bank0} battery capacity"
    rated_capacity:
      name: "${battery_bank0} rated capacity"
    state_of_charge:
      name: "${battery_bank0} state of charge"
    charging_cycles:
      name: "${battery_bank0} charging cycles"
    state_of_health:
      name: "${battery_bank0} state of health"
    port_voltage:
      name: "${battery_bank0} port voltage"

  - platform: seplos_bms
    seplos_bms_id: battery_bank1
    min_cell_voltage:
      name: "${battery_bank1} min cell voltage"
    max_cell_voltage:
      name: "${battery_bank1} max cell voltage"
    min_voltage_cell:
      name: "${battery_bank1} min voltage cell"
    max_voltage_cell:
      name: "${battery_bank1} max voltage cell"
    delta_cell_voltage:
      name: "${battery_bank1} delta cell voltage"
    average_cell_voltage:
      name: "${battery_bank1} average cell voltage"
    cell_voltage_1:
      name: "${battery_bank1} cell voltage 1"
    cell_voltage_2:
      name: "${battery_bank1} cell voltage 2"
    cell_voltage_3:
      name: "${battery_bank1} cell voltage 3"
    cell_voltage_4:
      name: "${battery_bank1} cell voltage 4"
    cell_voltage_5:
      name: "${battery_bank1} cell voltage 5"
    cell_voltage_6:
      name: "${battery_bank1} cell voltage 6"
    cell_voltage_7:
      name: "${battery_bank1} cell voltage 7"
    cell_voltage_8:
      name: "${battery_bank1} cell voltage 8"
    cell_voltage_9:
      name: "${battery_bank1} cell voltage 9"
    cell_voltage_10:
      name: "${battery_bank1} cell voltage 10"
    cell_voltage_11:
      name: "${battery_bank1} cell voltage 11"
    cell_voltage_12:
      name: "${battery_bank1} cell voltage 12"
    cell_voltage_13:
      name: "${battery_bank1} cell voltage 13"
    cell_voltage_14:
      name: "${battery_bank1} cell voltage 14"
    cell_voltage_15:
      name: "${battery_bank1} cell voltage 15"
    cell_voltage_16:
      name: "${battery_bank1} cell voltage 16"
    temperature_1:
      name: "${battery_bank1} temperature 1"
    temperature_2:
      name: "${battery_bank1} temperature 2"
    temperature_3:
      name: "${battery_bank1} temperature 3"
    temperature_4:
      name: "${battery_bank1} temperature 4"
    temperature_5:
      name: "${battery_bank1} environment temperature"
    temperature_6:
      name: "${battery_bank1} mosfet temperature"
    total_voltage:
      name: "${battery_bank1} total voltage"
    current:
      name: "${battery_bank1} current"
    power:
      name: "${battery_bank1} power"
    charging_power:
      name: "${battery_bank1} charging power"
    discharging_power:
      name: "${battery_bank1} discharging power"
    residual_capacity:
      name: "${battery_bank1} residual capacity"
    battery_capacity:
      name: "${battery_bank1} battery capacity"
    rated_capacity:
      name: "${battery_bank1} rated capacity"
    state_of_charge:
      name: "${battery_bank1} state of charge"
    charging_cycles:
      name: "${battery_bank1} charging cycles"
    state_of_health:
      name: "${battery_bank1} state of health"
    port_voltage:
      name: "${battery_bank1} port voltage"


  - platform: seplos_bms
    seplos_bms_id: battery_bank2
    min_cell_voltage:
      name: "${battery_bank2} min cell voltage"
    max_cell_voltage:
      name: "${battery_bank2} max cell voltage"
    min_voltage_cell:
      name: "${battery_bank2} min voltage cell"
    max_voltage_cell:
      name: "${battery_bank2} max voltage cell"
    delta_cell_voltage:
      name: "${battery_bank2} delta cell voltage"
    average_cell_voltage:
      name: "${battery_bank2} average cell voltage"
    cell_voltage_1:
      name: "${battery_bank2} cell voltage 1"
    cell_voltage_2:
      name: "${battery_bank2} cell voltage 2"
    cell_voltage_3:
      name: "${battery_bank2} cell voltage 3"
    cell_voltage_4:
      name: "${battery_bank2} cell voltage 4"
    cell_voltage_5:
      name: "${battery_bank2} cell voltage 5"
    cell_voltage_6:
      name: "${battery_bank2} cell voltage 6"
    cell_voltage_7:
      name: "${battery_bank2} cell voltage 7"
    cell_voltage_8:
      name: "${battery_bank2} cell voltage 8"
    cell_voltage_9:
      name: "${battery_bank2} cell voltage 9"
    cell_voltage_10:
      name: "${battery_bank2} cell voltage 10"
    cell_voltage_11:
      name: "${battery_bank2} cell voltage 11"
    cell_voltage_12:
      name: "${battery_bank2} cell voltage 12"
    cell_voltage_13:
      name: "${battery_bank2} cell voltage 13"
    cell_voltage_14:
      name: "${battery_bank2} cell voltage 14"
    cell_voltage_15:
      name: "${battery_bank2} cell voltage 15"
    cell_voltage_16:
      name: "${battery_bank2} cell voltage 16"
    temperature_1:
      name: "${battery_bank2} temperature 1"
    temperature_2:
      name: "${battery_bank2} temperature 2"
    temperature_3:
      name: "${battery_bank2} temperature 3"
    temperature_4:
      name: "${battery_bank2} temperature 4"
    temperature_5:
      name: "${battery_bank2} environment temperature"
    temperature_6:
      name: "${battery_bank2} mosfet temperature"
    total_voltage:
      name: "${battery_bank2} total voltage"
    current:
      name: "${battery_bank2} current"
    power:
      name: "${battery_bank2} power"
    charging_power:
      name: "${battery_bank2} charging power"
    discharging_power:
      name: "${battery_bank2} discharging power"
    residual_capacity:
      name: "${battery_bank2} residual capacity"
    battery_capacity:
      name: "${battery_bank2} battery capacity"
    rated_capacity:
      name: "${battery_bank2} rated capacity"
    state_of_charge:
      name: "${battery_bank2} state of charge"
    charging_cycles:
      name: "${battery_bank2} charging cycles"
    state_of_health:
      name: "${battery_bank2} state of health"
    port_voltage:
      name: "${battery_bank2} port voltage"
 
switch:
  - platform: restart
    name: "Restart BMS LOGGER"

[manznOnly]

@idanny50 nice work - thx for sharing - but now i have to test this too heheh :D

[Meli73]

wow, Great.

I'll check this, too with my two 1101-10E-SP76-16S BMS (Master and Slave).
There should be no change needed, or? beside removing the 2nd slave form the yaml off course

BTW is using the Automatic dip switch mode optinal? or do I have to use it? Because I already have a working DIP configuration.

[Meli73]

I have unfortunately seen a few pauses on the slave channel. 1-2 minutes long. What can be the reason for this?

[Meli73]

[Meli73]

the corresponding B0 channel looks quit normal

[Meli73]

most of the time the two packs are very similar. but some times Orange makes a "side-step"

[Meli73]

here is a log of this Missing B1 channel
logs_seplos-bms-2_logs.txt

[manznOnly]

@idanny50 which cable do you use for a and for b ?

variant 1: a) orange b) orange/white
variant 2: a) orange/white b) orange

test both variants - but it looks like this doesn´t work on my boxes ...

[Meli73]

Pin 1 (orange/white) = B
Pin 2 (orange) = A

did work for me

[Soul-man-dot]

Hey!
I am trying to set up a multipack with your informations here.

I am able to read the masterpack as @idanny50 explained.
But the slave pack isnt showing up.
TX and RX are blinking on the RS485 board but in iobroker there is no seplos_b1 showing up.

I am grateful for any help.

substitutions:
  name: seplos
  battery_bank0: "${name} B0"
  battery_bank1: "${name} B1"
#  battery_bank2: "${name} B2"
#  battery_bank3: "${name} B3"
  device_description: "Monitor a Seplos BMS via RS485"
  external_components_source: github://syssi/esphome-seplos-bms@main
# uart0 für alle Slave packs / Baudrate = 19200
  tx_pin_uart0: GPIO1
  rx_pin_uart0: GPIO3
# uart1 für Master pack / Baudrate = 9600
  tx_pin_uart1: GPIO13
  rx_pin_uart1: GPIO12

esphome:
  name: ${name}
  comment: ${device_description}
  project:
    name: "syssi.esphome-seplos-bms"
    version: 1.1.0

esp8266:
  board: esp12e
#  framework:
#    type: esp-idf

external_components:
  - source: ${external_components_source}
    refresh: 0s

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

ota:

logger:
  level: DEBUG


# If you use Home Assistant please remove this `mqtt` section and uncomment the `api` component!
# The native API has many advantages over MQTT: https://esphome.io/components/api.html#advantages-over-mqtt
mqtt:
  broker: !secret mqtt_host
  username: !secret mqtt_username
  password: !secret mqtt_password
  id: mqtt_client

# api:

uart:
  # uart_0 ist für alle Slave packs
  - id: uart_0
    baud_rate: 19200
    tx_pin: ${tx_pin_uart0}
    rx_pin: ${rx_pin_uart0}
    # The increased RX buffer size is important because
    # the full BMS response must fit into the buffer
    rx_buffer_size: 384
 
  # uart_1 ist für das Master pack
  - id: uart_1
    baud_rate: 9600
    tx_pin: ${tx_pin_uart1}
    rx_pin: ${rx_pin_uart1}
    # The increased RX buffer size is important because
    # the full BMS response must fit into the buffer
    rx_buffer_size: 384

#  debug:
#    dummy_receiver: false
#    direction: BOTH
    # after:
    #   delimiter: "\r"
    # sequence:
    #   - lambda: UARTDebug::log_string(direction, bytes);


seplos_modbus:
  - id: modbus0
    uart_id: uart_0
#    rx_timeout: 150ms
  - id: modbus1
    uart_id: uart_1
#    rx_timeout: 150ms

seplos_bms:
  # MASTER PACK
  - id: battery_bank0
    # Dip switch configuration of the first pack / address 0x01
    #  8    7    6    5    4    3    2   1
    # off, off, off, off, off, off, off, on
    address: 0x00
    # Known protocol versions: 0x20 (Seplos), 0x26 (Boqiang)
    protocol_version: 0x20
    seplos_modbus_id: modbus1
    update_interval: 10s
    
    # SLAVE PACK 1
  - id: battery_bank1
    # Dip switch configuration of the second pack / address 0x02
    #  8    7    6    5    4    3   2    1
    # off, off, off, off, off, off, on, off
    address: 0x01
    # Known protocol versions: 0x20 (Seplos), 0x26 (Boqiang)
    protocol_version: 0x20
    seplos_modbus_id: modbus0
    update_interval: 11s
    
sensor:
  - platform: seplos_bms
# MASTER PACK
    seplos_bms_id: battery_bank0
    min_cell_voltage:
        name: "${battery_bank0} min cell voltage"
    max_cell_voltage:
        name: "${battery_bank0} max cell voltage"
    min_voltage_cell:
        name: "${battery_bank0} min voltage cell"
    max_voltage_cell:
        name: "${battery_bank0} max voltage cell"
    delta_cell_voltage:
        name: "${battery_bank0} delta cell voltage"
    average_cell_voltage:
        name: "${battery_bank0} average cell voltage"
    cell_voltage_1:
        name: "${battery_bank0} cell voltage 1"
    cell_voltage_2:
        name: "${battery_bank0} cell voltage 2"
    cell_voltage_3:
        name: "${battery_bank0} cell voltage 3"
    cell_voltage_4:
        name: "${battery_bank0} cell voltage 4"
    cell_voltage_5:
        name: "${battery_bank0} cell voltage 5"
    cell_voltage_6:
        name: "${battery_bank0} cell voltage 6"
    cell_voltage_7:
        name: "${battery_bank0} cell voltage 7"
    cell_voltage_8:
        name: "${battery_bank0} cell voltage 8"
    cell_voltage_9:
        name: "${battery_bank0} cell voltage 9"
    cell_voltage_10:
        name: "${battery_bank0} cell voltage 10"
    cell_voltage_11:
        name: "${battery_bank0} cell voltage 11"
    cell_voltage_12:
        name: "${battery_bank0} cell voltage 12"
    cell_voltage_13:
        name: "${battery_bank0} cell voltage 13"
    cell_voltage_14:
        name: "${battery_bank0} cell voltage 14"
    cell_voltage_15:
        name: "${battery_bank0} cell voltage 15"
    cell_voltage_16:
        name: "${battery_bank0} cell voltage 16"
    temperature_1:
        name: "${battery_bank0} temperature 1"
    temperature_2:
        name: "${battery_bank0} temperature 2"
    temperature_3:
        name: "${battery_bank0} temperature 3"
    temperature_4:
        name: "${battery_bank0} temperature 4"
    temperature_5:
        name: "${battery_bank0} environment temperature"
    temperature_6:
        name: "${battery_bank0} mosfet temperature"
    total_voltage:
        name: "${battery_bank0} total voltage"
    current:
        name: "${battery_bank0} current"
    power:
        name: "${battery_bank0} power"
    charging_power:
        name: "${battery_bank0} charging power"
    discharging_power:
        name: "${battery_bank0} discharging power"
    residual_capacity:
        name: "${battery_bank0} residual capacity"
    battery_capacity:
        name: "${battery_bank0} battery capacity"
    rated_capacity:
        name: "${battery_bank0} rated capacity"
    state_of_charge:
        name: "${battery_bank0} state of charge"
    charging_cycles:
        name: "${battery_bank0} charging cycles"
    state_of_health:
        name: "${battery_bank0} state of health"
    port_voltage:
        name: "${battery_bank0} port voltage"

  - platform: seplos_bms
# SLAVE PACK 1
    seplos_bms_id: battery_bank1
    min_cell_voltage:
      name: "${battery_bank1} min cell voltage"
    max_cell_voltage:
      name: "${battery_bank1} max cell voltage"
    min_voltage_cell:
      name: "${battery_bank1} min voltage cell"
    max_voltage_cell:
      name: "${battery_bank1} max voltage cell"
    delta_cell_voltage:
      name: "${battery_bank1} delta cell voltage"
    average_cell_voltage:
      name: "${battery_bank1} average cell voltage"
    cell_voltage_1:
      name: "${battery_bank1} cell voltage 1"
    cell_voltage_2:
      name: "${battery_bank1} cell voltage 2"
    cell_voltage_3:
      name: "${battery_bank1} cell voltage 3"
    cell_voltage_4:
      name: "${battery_bank1} cell voltage 4"
    cell_voltage_5:
      name: "${battery_bank1} cell voltage 5"
    cell_voltage_6:
      name: "${battery_bank1} cell voltage 6"
    cell_voltage_7:
      name: "${battery_bank1} cell voltage 7"
    cell_voltage_8:
      name: "${battery_bank1} cell voltage 8"
    cell_voltage_9:
      name: "${battery_bank1} cell voltage 9"
    cell_voltage_10:
      name: "${battery_bank1} cell voltage 10"
    cell_voltage_11:
      name: "${battery_bank1} cell voltage 11"
    cell_voltage_12:
      name: "${battery_bank1} cell voltage 12"
    cell_voltage_13:
      name: "${battery_bank1} cell voltage 13"
    cell_voltage_14:
      name: "${battery_bank1} cell voltage 14"
    cell_voltage_15:
      name: "${battery_bank1} cell voltage 15"
    cell_voltage_16:
      name: "${battery_bank1} cell voltage 16"
    temperature_1:
      name: "${battery_bank1} temperature 1"
    temperature_2:
      name: "${battery_bank1} temperature 2"
    temperature_3:
      name: "${battery_bank1} temperature 3"
    temperature_4:
      name: "${battery_bank1} temperature 4"
    temperature_5:
      name: "${battery_bank1} environment temperature"
    temperature_6:
      name: "${battery_bank1} mosfet temperature"
    total_voltage:
      name: "${battery_bank1} total voltage"
    current:
      name: "${battery_bank1} current"
    power:
      name: "${battery_bank1} power"
    charging_power:
      name: "${battery_bank1} charging power"
    discharging_power:
      name: "${battery_bank1} discharging power"
    residual_capacity:
      name: "${battery_bank1} residual capacity"
    battery_capacity:
      name: "${battery_bank1} battery capacity"
    rated_capacity:
      name: "${battery_bank1} rated capacity"
    state_of_charge:
      name: "${battery_bank1} state of charge"
    charging_cycles:
      name: "${battery_bank1} charging cycles"
    state_of_health:
      name: "${battery_bank1} state of health"
    port_voltage:
      name: "${battery_bank1} port voltage"

switch:
  - platform: restart
    name: "Restart BMS LOGGER"

[vejvik]

I have two MASON-280 battery boxes with BMS 1101-10E-SP76-16S. From the master, will be connected CAN to the inverter, and from the master, rs4851 will be connected to slave rs4852. (DIP switches according to CAN 2p connection)
How could I read the data via esp to HomeAssistant, how would the wiring diagram look like?
thank you for the advice

[FritsOV]

Does this code also work if besides the rs458 for communication with Seplos master and slave(s) and the can port is used for a Victron connection to the cerbo GX. Dip switch are set to:
1 pack: 5 and 6 ON
2 pack: 1 ON
3 pack: 2 ON
4 pack: 1 and 2 ON

[ntrance]

@idanny50 can you link the exact RS485 board you used? I cannot get the one I have to work with a single MASON.

[FritsOV]

Thank you for your reaction.
I have finally got it working but get only data from 3 slaves.
working board is: lilo esp 8266 with:

Https://a.aliexpress.com/_EG8uWz9

tomorrow I get the rj45 splitter and a new board. I will try to acces the defined victron can port with baudrate 9600.

TTL board: https://a.aliexpress.com/_EQqlkf1

as soon as I have tested the code to read data from the master pack I will give results here.

I have to say that logging the slaves gives some bad header packets and some other errors.

[ntrance]

I have the same TTL board from Amazon https://amzn.to/4aQwC7G but do not get any data from the seplos.
However, I can using the 485 to USB adapter I use for the battery monitor. I'm using a pi to capture the ttyUSB0 as a workaround at the moment. I've just ordered these https://amzn.to/44fFj8Y to see if it works with a different type of board.

[FritsOV]

Did you try with hust one pack and second do you see besides the RX the TX light blink.
Baud rate for 10E type is 19200 and for me to work I had to set different intervals
For slave one I have set update_interval to 15s pack2 20s and pack3 25s.

[FritsOV]

i tried a few days to get the boards ( https://a.aliexpress.com/_EQqlkf1 ) working without succes. my other board is working fine for slaves but master i can't get it working. Whatever i try, baudrate, different GPIO pins, etc. there is no succes.
I even tried my working board with a lilo D1 mini and managed to get 2 uart ports working. That is working for reading slave packs. Masterpack also no succes with that board.
I think it has something to do with the dipswitchsettings. Because i use 4 batterypacks in a victron multiplus system the dipswitch number 5 must be set for master. In my case master is 5 = on and 6 = on. But would love to hear from a goeroe what he thinks about this. Also the RS port stays at default but in the BMS is the can port defined as VCTRN. Not sure if i should use a rs458 ttl board for this.

@syssi @idanny50 i even looked into the code https://github.com/Louisvdw/dbus-serialbattery and https://github.com/Dr-Gigavolt/dbus-aggregate-batteries and here https://github.com/BrucePerens/seplos_c/tree/main

Kind regards,

[FritsOV]

Today i tried again with a esp32devkit V1 Using GPIO 18 and 19. and got finally succes for slave packs with https://a.aliexpress.com/_EQqlkf1 board. I already had it working with https://a.aliexpress.com/_EG8uWz9 this board and read for a couple of weeks now the data off the 3 slave packs.

Did not manage to get data from the canbus from the master connected to the victron cerbo gx with a rs458 to usb converter.
Can someone tell me what the portsettings like baudrate is if victron uses 500kbit for this bus?

And: