We have developed a new NetControl model - 7R8A1RS, which has one RS485 serial port. It is additionally equipped with 7 relay outputs (5A/240VAC) and 8 alarm (analog) inputs.
For this model we have developed a software module for communication with the available PZEM-016 modules, which measure energy, power, current, voltage, frequency and power factor in 220VAC circuits. Access to 16 pcs is supported. measuring modules, and the data from them are available via Web and MQTT.