This ESPHome component code provides the basic functionality of SmartEVSE Sensorbox 2 (https://github.com/SmartEVSE/Sensorbox-2) within ESPHome.
- Sends current and voltage information to SmartEVSE master through modbus
- Both P1 and CT readings are supported through simple configuration
- Possibility to adjust power rotation and 3/4 wire configurations
- Basic protection against loss of CT/P1 data (internal timer unsets dataready telegram if no fresh data)
- Allows to use CT readings without actually using the CT readings for SmartEVSE (for example; solar production)
- Allows to log/consume a whole array of extra P1 measurement data with the DSMR ESPHome component
Basically if you already use Home Assistant and ESPHome, it can easily be flashed and used as a drop-in replacement for the original Sensorbox firmware without losing its core functionality of feeding P1/CT power data to SmartEVSE without having to rely on WiFi, network or (for example) Home Assistant.
Below YAML can simply be copied and paste'd in your ESPHome project and ESPHome will then automatically fetch the latest versions of the code and compile everything for you. No need to copy and paste any custom files. Please note that it is only meant to be uploaded onto Sensorbox 2 hardware. No out of the box support for other configurations (even though you could in theory make this work).
NOTE: The PIC on your Sensorbox should be programmed to only provide CT measurements, else it may interfere with modbus communication. Please first install the original ESP32 Sensorbox 2 firmware and reboot the device once (so the PIC can be reprogrammed) before using the ESPHome component.
esphome:
name: sensorbox
platformio_options:
board_build.f_cpu: 240000000L
time:
- platform: homeassistant
id: homeassistant_time
external_components:
- source: github://arpiecodes/esphome-modbus-server@master
refresh: 60s
components:
- modbus_server
- source: github://arpiecodes/esphome-smartevse-sensorbox@main
refresh: 60s
components:
- smartevse_sensorbox
esp32:
board: esp32dev
variant: esp32
framework:
type: arduino
# Enable logging
logger:
baud_rate: 0 # Disable logging over UART
# Enable Home Assistant API
api:
# Don't reboot if the HomeAssistant connection times out (we can do just fine without it)
reboot_timeout: 0s
ota:
password: "YOURPASSWORDHERE"
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: SmartEVSE Sensorbox
password: !secret wifi_fallback_password
captive_portal:
status_led:
pin: GPIO32
uart:
- id: uart_pic
baud_rate: 115200
rx_pin: 3 # pin is changed to 23 inside component setup method
tx_pin: 1 # circumvents limitation with 3 active UARTs on non-default pins in ESPHome
- id: uart_modbus
baud_rate: 9600
parity: NONE
stop_bits: 1
tx_pin: 16
rx_pin: 19
- id: uart_p1
baud_rate: 115200
rx_buffer_size: 1700
rx_pin:
number: 27
inverted: true
modbus_server:
- id: modbus_evse
uart_id: uart_modbus
address: 10 # fixed sensorbox address
de_pin: 17 # don't change
re_pin: 18 # don't change
input_registers:
- start_address: 0
default: 0
number: 20
on_read: |
// This lambda processes modbus input register requests from SmartEVSE and responds with latest values
return id(sensorbox)->modbus_input_on_read(address, value);
smartevse_sensorbox:
id: sensorbox
uart_id: uart_pic
use_ct_readings: false # whether to send CT values to SmartEVSE as EnergyMeter readings
ct_rotation: CW # CT field rotation (CW: clockwise, CCW: counter-clockwise)
ct_wires: 4WIRE # CT wire configuration (3WIRE or 4WIRE)
p1_sensors: # optional if use_ct_readings is true
# IDs of sensors to use for P1 measurements (see dsmr section below)
dsmr_version: dsmr_version
power_consumed_phase_1: power_consumed_phase_1
power_consumed_phase_2: power_consumed_phase_2
power_consumed_phase_3: power_consumed_phase_3
voltage_phase_1: voltage_phase_1
voltage_phase_2: voltage_phase_2
voltage_phase_3: voltage_phase_3
power_produced_phase_1: power_produced_phase_1
power_produced_phase_2: power_produced_phase_2
power_produced_phase_3: power_produced_phase_3
# DSMR component config
# see https://esphome.io/components/sensor/dsmr.html
dsmr:
uart_id: uart_p1
max_telegram_length: 1700
request_interval: 2s
receive_timeout: 300ms
sensor:
- platform: dsmr
energy_delivered_tariff1:
name: "Energy Consumed Tariff 1"
state_class: total_increasing
energy_delivered_tariff2:
name: "Energy Consumed Tariff 2"
state_class: total_increasing
energy_returned_lux:
name: "Energy Produced Luxembourg"
state_class: total_increasing
energy_returned_tariff1:
name: "Energy Produced Tariff 1"
state_class: total_increasing
energy_returned_tariff2:
name: "Energy Produced Tariff 2"
state_class: total_increasing
power_delivered:
name: "Power Consumed"
accuracy_decimals: 3
power_returned:
name: "Power Produced"
accuracy_decimals: 3
electricity_failures:
name: "Electricity Failures"
icon: mdi:alert
electricity_long_failures:
name: "Long Electricity Failures"
icon: mdi:alert
voltage_l1:
id: voltage_phase_1
name: "Voltage Phase 1"
voltage_l2:
id: voltage_phase_2
name: "Voltage Phase 2"
voltage_l3:
id: voltage_phase_3
name: "Voltage Phase 3"
current_l1:
id: current_phase_1
name: "Current Phase 1"
current_l2:
id: current_phase_2
name: "Current Phase 2"
current_l3:
id: current_phase_3
name: "Current Phase 3"
power_delivered_l1:
id: power_consumed_phase_1
name: "Power Consumed Phase 1"
accuracy_decimals: 3
power_delivered_l2:
id: power_consumed_phase_2
name: "Power Consumed Phase 2"
accuracy_decimals: 3
power_delivered_l3:
id: power_consumed_phase_3
name: "Power Consumed Phase 3"
accuracy_decimals: 3
power_returned_l1:
id: power_produced_phase_1
name: "Power Produced Phase 1"
accuracy_decimals: 3
power_returned_l2:
name: "Power Produced Phase 2"
id: power_produced_phase_2
accuracy_decimals: 3
power_returned_l3:
id: power_produced_phase_3
name: "Power Produced Phase 3"
accuracy_decimals: 3
gas_delivered:
name: "Gas Consumed"
state_class: total_increasing
- platform: uptime
name: "Sensorbox Uptime"
update_interval: 30s
- platform: wifi_signal
name: "Sensorbox Wi-Fi Signal"
update_interval: 60s
- platform: custom
lambda: |-
return { id(sensorbox)->ct1_current_, id(sensorbox)->ct2_current_, id(sensorbox)->ct3_current_};
# Sensor names for PIC connected current clamps in HA, you can change these if you want
# You do not have to set use_ct_readings to true to get these readings
# This means you can use them for other purposes as well
sensors:
- name: Current CT 1
- name: Current CT 2
- name: Current CT 3
text_sensor:
- platform: dsmr
identification:
id: dsmr_identification
name: "DSMR Identification"
p1_version:
id: dsmr_version
name: "DSMR Version"
- platform: wifi_info
ip_address:
name: "Sensorbox IP Address"
ssid:
name: "Sensorbox Wi-Fi SSID"
bssid:
name: "Sensorbox Wi-Fi BSSID"
- platform: version
name: "ESPHome Version"
hide_timestamp: trueMIT License
Copyright (c) 2022 Jorrit Pouw
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