FieldSim - Protocol Simulator

Fieldsim turns your iPhone into a real industrial and IoT protocol test bench — no extra hardware, no lab PC, no separate test tools. Fieldsim isn't a mock-up. Every protocol is implemented against its real wire-level specification and verified against industry-standard reference clients and libraries. Real SCADA software, PLCs, and IoT gateways can connect to your iPhone and talk to it exactly as they would to a real field device. Simulate 11 real protocols: • MQTT — full broker with multi-topic publish/subscribe • OPC UA — session/subscription server with a real address space • Modbus TCP — coils, discrete inputs, holding & input registers • BACnet/IP — Who-Is/I-Am discovery, ReadProperty/WriteProperty • DNP3 — link/transport/application layers, Class 0 polling, Direct Operate • EtherNet/IP — CIP explicit messaging (Get/Set_Attribute_Single) • SNMP v2c — GET/GETNEXT/SET plus trap…