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+--- Thread: RS485 Modbus working ESPHome configuration (/showthread.php?tid=7585)
RS485 Modbus working ESPHome configuration - darsh - 02-08-2025
Hello everyone!
I wanted to share my ESPHome configuration for interfacing with a solar charge controller (Epever LS1024B) using RS485.
This setup allows to read the PV voltage from the controller's register.
Below is the working configuration that I used, which may help others facing similar challenges.
Code:
# UART configuration
uart:
- id: rs485
tx_pin: GPIO27
rx_pin: GPIO14
baud_rate: 115200 # Baud rate
data_bits: 8 # Data bits
stop_bits: 1 # Stop bits
parity: NONE # No parity
# Modbus configuration
modbus:
send_wait_time: 200ms
uart_id: rs485
id: mod_bus
# Modbus controller configuration
modbus_controller:
- id: charge_controller
address: 0x01
modbus_id: mod_bus
command_throttle: 100ms
setup_priority: -10
update_interval: 300s # Update interval
# Reading register 0x3100
sensor:
- platform: modbus_controller
name: "Solar Charge Controller PV Voltage"
address: 0x3100
register_type: read
id: solar_register_v_in
accuracy_decimals: 2 # Decimal accuracy
unit_of_measurement: V
filters:
- multiply: 0.01 # Scale factor based on charger specsI hope this helps others in the community.
RE: RS485 Modbus working ESPHome configuration - admin - 02-08-2025
thanks share your result.