All Modbus Register 210: External room T10 Temperature

Technical Definition

The register External room T10 Temperature at address 210 is used to monitor external room t10 Temperature on the All.

• Protocol: Modbus RTU
• Data Type: S WORD
• Unit: °C
• 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 External room T10 temperature (Address: 210)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=210, 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: "External room T10 temperature"
  address: 210
  value_type: S_WORD
  unit_of_measurement: "°C"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[All]

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

💡 Engineer's Insight

Analysis: External Temperature reading in degrees Celsius (°C) for sensor T10.

Troubleshooting: Zero or anomalous values indicate sensor failure or environmental extremes. Check sensor connection and calibration.