Esphome Web 10C200 Modbus Register 3033: 43034 Supply humidity from outside

Technical Definition

The register 43034 Supply humidity from outside at address 3033 is used to monitor 43034 supply humidity from outside on the Esphome Web 10C200.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit: %
• Access: Read Only

How to Read (Python pymodbus)

Use this code snippet to read this specific value via RS485:

from pymodbus.client.sync import ModbusSerialClient

client = ModbusSerialClient(method='rtu', port='/dev/ttyUSB0', baudrate=9600)
client.connect()

# Read 43034 Supply humidity from outside (Address: 3033)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=3033, count=2, unit=1)

if not result.isError():
    print(f"Raw Value: {result.registers}")
else:
    print("Error reading register")

client.close()

Integration (Home Assistant)

Paste this into your configuration.yaml:

- platform: modbus_controller
  name: "43034 Supply humidity from outside"
  address: 3033
  value_type: U_WORD
  unit_of_measurement: "%"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Esphome Web 10C200]

    PLC -- "A+ (D+)" --> Device
    PLC -- "B- (D-)" --> Device
    PLC -- GND --> Device

💡 Engineer's Insight

Analysis: Supply air humidity from outside air intake in percentage (%). Measures moisture content.

Troubleshooting: Zero or abnormal value points to sensor error or very dry/saturated external conditions.