Siemens S7-1200 / S7-1500 to MQTT Integration Manual

Connect Siemens SIMATIC S7 controllers to enterprise MQTT infrastructure with sub-10ms deterministic polling or subscriptions—zero proprietary S7comm hacks required.

TIA Portal Setup Steps

• 1. Activate OPC UA Server: Enable the embedded OPC UA server in TIA Portal CPU Properties (port 4840) and set minimum sampling intervals.
• 2. Expose Optimized Data Blocks: Check Accessible from OPC UA on target DBs; opcua2mqtt natively resolves string NodeIDs such as ns=3;s="DB_Telemetry"."Pressure".
• 3. Browse & Configure: Run opcua2mqtt --browse opc.tcp://192.168.1.50:4840 to auto-discover PLC namespaces.
• 4. Deploy on IOT2050 or Linux: Run the native aarch64 binary or Docker container with <50MB RAM.

Related Industrial Solution

Siemens S7-1200 / S7-1500 & TIA Portal OPC UA to MQTT Solution Guide →