Ex Esphome Web 64E0E5 Modbus Register 215: Name battery average voltage

Technical Definition

The register name battery average voltage at address 215 is used to monitor name battery average voltage on the Ex Esphome Web 64E0E5.

• Protocol: Modbus RTU
• Data Type: S WORD
• Unit: V
• 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 name battery average voltage (Address: 215)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=215, 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: "name battery average voltage"
  address: 215
  value_type: S_WORD
  unit_of_measurement: "V"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Ex Esphome Web 64E0E5]

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

💡 Engineer's Insight

Analysis: Displays the average DC voltage of the battery system in Volts (V). Critical for battery health and charge state assessment.

Troubleshooting: Zero or very low voltage may indicate a disconnected or deeply discharged battery. Check battery connections and charge level.