tests/modbus/modbus_0@modbus/ModbusTCPclient_0@ModbusTCPclient/ModbusRequest_1@ModbusRequest/confnode.xml
Add web extension: configure Modbus plugin parameters (currently only supports Modbus clients)
<?xml version='1.0' encoding='utf-8'?>
<ModbusRequest xmlns:xsd="http://www.w3.org/2001/XMLSchema" Function="04 - Read Input Registers" SlaveID="0" Start_Address="0"/>