External Systems¶
Quick Guide¶
| Protocol | Best for | Go to |
|---|---|---|
| Modbus TCP | register-oriented PLC/device integration | Modbus TCP |
| MQTT | brokered event and message exchange | MQTT |
| OPC UA | exposing runtime variables to OPC UA clients | OPC UA |
Picking The Right Protocol¶
- Choose Modbus TCP when the other side expects coils/registers and you want a classic industrial register model.
- Choose MQTT when you need pub/sub messaging through a broker.
- Choose OPC UA when the other side is an OPC UA client and needs a richer address-space view of runtime data.