Kan iemand mij verder helpen met een issue waar ik nu al vrij lang mee worstel? Ik ben ten einde raad.
Ik heb een laadpaal met ABB B21 meter die ik via Zigbee aan/uit kan zetten. Echter wil ik d.v.m. een R3485 module de modbus van de B21 uitlezen zodat ik de power consumption etc. kan uitlezen. Dit lukt om wat voor reden dan ook niet. Ik krijg geen data uit de B21. Ik heb meerdere ESP32 boards geprobeerd. En alle waarden en data heb ik uit eerdere scripts van Git gehaald en geverifieerd in de
B21 handleiding. In de logs krijg ik alleen maar 'modbus:083: stop waiting for response from 26 2000ms after last send'. Soms ook een 'Frame already active for 26 with 2 requests pending, refused'. En 'Probe refused by hub for range 0x8900' (waarbij die bytecode willekeurig is voor andere sensors zoals 0x5b14).
Ik weet het oprecht gewoon niet meer wat ik fout doe hierin
. Script ook al helemaal teruggebracht en de ETEK er bewust uitgehaald omdat ik alleen de B21 wil lezen.
Pinbezetting
ESP32 Gnd <> ETEK Gnd
ESP32 Gnd <> RS3485 Gnd
ESP32 VIN 5V <> ETEK +5V
ESP32 GPIO17 TXD <> RS3485 RXD
ESP32 GPIO16 RXD <> RS3485 TXD
RS3485 D- /B <> ABB B21 36 B
RS3485 D+ /A <> ABB B21 37 A
De ESP32 haalt 5V stroom weg van de ETEK. De ESP32 voed de RS3485 via 3.3V. TXD en RXD worden op de RS3485 weer omgedraaid (omdraaien heeft in het issue wat ik heb geen zin).
Settings in B21
RS348 - Modbus
Address: 26
BAUD rate: 9600
Parity: None
Access: Open
Ik heb de baudrate ook al eens op 4800 gezet maar geen resultaat.
Code in Home Assistant
YAML:
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| substitutions:
device: abbmeter
device_description: "ABB meter component for ABB kWh meter B21"
friendly_name: ABB B21
esphome:
name: abbmeter
comment: ABB power meter B21
## Get rid of CDC error:
platformio_options:
board_build.extra_flags:
- "-DARDUINO_USB_CDC_ON_BOOT=0"
## ESP32
esp32:
board: esp32dev
framework:
type: arduino
# Enable logging
logger:
logs:
modbus_controller.sensor: INFO
modbus_controller.output: INFO
modbus.number: INFO
esp32.preferences: INFO
sensor: INFO
text_sensor: INFO
number: INFO
# Enable Home Assistant API
api:
encryption:
key: !secret evseesp__api_encryption_key_evse
ota:
password: !secret evseesp__ota_password_evse
platform: esphome
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot
ap:
ssid: ${device}
password: !secret evseesp__fallback_password
fast_connect: false
power_save_mode: none
captive_portal:
# Enable webserver
web_server:
port: 80
auth:
username: admin
password: !secret evseesp__web_server_password_evse
version: 2
log: false
ota: false
### MODBUS ###
uart:
id: mod_bus
tx_pin: GPIO17
rx_pin: GPIO16
baud_rate: 9600
stop_bits: 1
modbus:
id: modbus1
modbus_controller:
- id: B21
address: 26
modbus_id: modbus1
setup_priority: -10
update_interval: 10s
sensor:
## 1 Total Energy (kWh) B21
- platform: modbus_controller
modbus_controller_id: B21
name: "B21 Import energy"
address: 0x5000
register_type: holding
value_type: U_QWORD
device_class: energy
unit_of_measurement: "kWh"
accuracy_decimals: 2
state_class: total_increasing
filters:
- multiply: 0.01
- platform: modbus_controller
modbus_controller_id: B21
name: "B21 Export energy"
address: 0x5004
register_type: holding
value_type: U_QWORD
device_class: energy
unit_of_measurement: "kWh"
accuracy_decimals: 2
state_class: total_increasing
filters:
- multiply: 0.01
## 2 Instantaneous values
## 2.1 Voltage (V) B21
- platform: modbus_controller
modbus_controller_id: B21
name: "B21 Voltage L1-N"
address: 0x5B00
register_type: holding
value_type: U_DWORD
accuracy_decimals: 1
device_class: voltage
unit_of_measurement: "V"
filters:
- multiply: 0.1
## 2.2 Current (A) B21
- platform: modbus_controller
modbus_controller_id: B21
name: "B21 Current L1"
address: 0x5B0C
register_type: holding
value_type: U_DWORD
accuracy_decimals: 2
device_class: current
unit_of_measurement: "A"
filters:
- multiply: 0.01
## 2.3 Active Power (Watt) B21
- platform: modbus_controller
modbus_controller_id: B21
name: "B21 Power total"
address: 0x5B14
register_type: holding
value_type: S_DWORD
accuracy_decimals: 2
device_class: power
unit_of_measurement: "W"
filters:
- multiply: 0.01
## 2.4 Frequency (Hz) B21
- platform: modbus_controller
modbus_controller_id: B21
name: "B21 Frequency"
address: 0x5B2C
register_type: holding
value_type: U_WORD
accuracy_decimals: 2
device_class: frequency
unit_of_measurement: "Hz"
filters:
- multiply: 0.01
## 2.5 Power factor (-) B21
- platform: modbus_controller
modbus_controller_id: B21
name: "B21 Power factor total"
address: 0x5B3A
register_type: holding
value_type: U_WORD
accuracy_decimals: 3
device_class: power_factor
filters:
- multiply: 0.001
## 3 Production data and identification B21
text_sensor:
- platform: modbus_controller
modbus_controller_id: B21
name: "B21 Serial Number"
address: 0x8900
register_type: holding
response_size: 6
entity_category: diagnostic
raw_encode: HEXBYTES
skip_updates: 60
- platform: modbus_controller
modbus_controller_id: B21
name: "B21 Meter firmware version"
address: 0x8908
register_type: holding
response_size: 16
entity_category: diagnostic
skip_updates: 60
- platform: modbus_controller
modbus_controller_id: B21
name: "B21 Type designation"
address: 0x8960
register_type: holding
response_size: 8
entity_category: diagnostic
skip_updates: 60 |
/f/image/CttsCmfpFZgDjFflia6rZTEs.png?f=fotoalbum_tile) | |
[
Voor 5% gewijzigd door
ViezeVis op 20-09-2026 19:35
]
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En het hier weer over de DHZ laadpalen zelf hebben?
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. Kostte me 4 weken en 3 ESP boards om dat te ontdekken.
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