FieldSim - Protocol Simulator
Industrial Protocol Simulator
About
This app transforms your iPhone into a powerful industrial and IoT protocol test bench. It accurately simulates 11 real-world protocols, allowing devices to connect and communicate as they would with actual field equipment, all without extra hardware.
What's New in FieldSim
1.0
October 14, 2026
Developer apps
FAQ
What protocols does FieldSim simulate?
FieldSim simulates 11 real protocols including MQTT, OPC UA, Modbus TCP, BACnet/IP, DNP3, EtherNet/IP, SNMP v2c, AMQP 0-9-1, CoAP, HART-IP, and LoRaWAN. Each protocol is implemented against its wire-level specification for accurate testing.
Can I test FieldSim simulators with other devices?
Yes, FieldSim includes a matching built-in client for every simulated protocol. This allows you to test your simulators or any other real device on your network without needing a separate application.
Does FieldSim require extra hardware?
No, FieldSim turns your iPhone into a complete test bench, eliminating the need for extra hardware, a lab PC, or separate test tools. It works over Wi-Fi with any device on the same network.
How does FieldSim handle data for simulation?
FieldSim allows for configurable value patterns for simulated data, including random, sine wave, ramp, and static options. This provides realistic data for testing purposes.
What is the pricing for FieldSim?
FieldSim is a paid application priced at $9.99. This one-time purchase grants access to all its simulation and testing features.
Is FieldSim suitable for beginners learning protocols?
Yes, FieldSim is designed for students and instructors learning how industrial protocols work on the wire. Its accurate implementation and built-in clients provide a practical learning environment.
What devices is FieldSim compatible with?
FieldSim is an iOS-native application designed for both iPhone and iPad. It leverages Apple's Network framework for efficient performance.
How often is FieldSim updated?
FieldSim was last updated on October 14, 2026, with version 1.0. Future updates will likely focus on protocol enhancements and new features based on user feedback.