A line that cannot wait for a cable
A smart factory — IIoT, the industrial internet — puts PLCs, robots, sensors, AGVs, and an MES on the network for production data, equipment watch, quality traceability, and flexible scheduling. Factories are often outside town, where pulling cable is expensive. 4G and 5G let a line come online and grow without that pull. SimtoLink modules for this work are 4G / 5G / NB-IoT, industrial-grade, with UART, SPI, and I2C. The company supports 500+ enterprise customers and has connected more than 10 million factory devices.
Where the module sits on a line
Collecting from a PLC, watching a machine before it fails, moving an AGV, and tracing a part are different jobs on the same floor. These are the usual ones, and the radio that tends to fit.
Predictive maintenance
Vibration, temperature, and current — the state of the machine — go up through the module. Warnings come earlier, the maintenance plan can move, and unplanned stops drop, so the machine lasts longer and the line stays available.
Traceability through the whole process
Process values, a barcode, or RFID go up through the module. The part can be followed from start to finish, quality can be read from the record, and a recall is smaller because each item has its own code.
Energy and an EMS
Compressors, switchboards, and energy use report into an EMS. Efficiency, the load ahead, and where energy can be cut all come from that record, which is how production cost comes down.
An edge gateway for the line
An edge gateway gathers several machines over 4G. Edge computing, protocol conversion, and a sync to the cloud put the line on one path upward.
What a shop floor asks of the module
- Coverage outside town: Factories are often suburban. Several operators and bands are what hold coverage and a failover handover.
- EMI on the floor: A workshop is full of electromagnetic noise. The module needs an industrial design and EMI resistance if it is to stay stable.
- Temperature: −40°C to 85°C, for the shop, the warehouse, and outdoors.
- The protocols the line already speaks: UART and SPI into the controller, plus Modbus, OPC UA, MQTT, and EtherNet/IP.
- From a sample to volume: SimtoLink modules span 2G, 3G, 4G, and 5G, with documentation, an SDK, and production supply.
Which radio fits a line, an AGV, or a meter
How live the data must be, how wide the pipe, and how noisy the building is should decide the module. A PLC and an energy meter do not share that. The rows below are the usual pairing on a factory floor.
| Job | Radio | What matters |
|---|---|---|
| Line collection, AGV, MES | 4G | Live data, a wide pipe, Modbus/OPC UA, SCADA |
| Low latency, video, edge computing | 5G | uRLLC, a wide pipe, an industrial 5G private network |
| Energy consumption monitoring, low-frequency sensors | NB-IoT | Very low power, daily or weekly reports, low cost |
| Edge gateways, data aggregation | 4G | Many machines on one gateway, protocol conversion, a sync to the cloud |
How SimtoLink fits a factory program
For a factory, the modules are industrial designs that hold temperature and EMI, with technical support 7×24. 4G is the recommendation for line collection, AGVs, machine watch, and an MES link. 5G is for low delay, a wide pipe, and an industrial 5G private network. NB-IoT fits infrequent jobs such as energy monitoring. An SDK a controls team can bring up quickly, work with mainstream chip vendors, and a named account manager come with the module.
A factory project is taken from the requirements and the radio choice, through a prototype on one line, and into volume. Documentation, the AT command set, an SDK, and sample code ship with the module, and supply is set for production and for the years the line stays up. Industrial internet work keeps adding machines that need a radio, and the module range will follow that.
How a factory project usually moves
A factory connectivity project usually moves in this order:
The choice turns on what is being connected (a line, an AGV, or energy), volume and how live it must be (MES wants it now; energy can wait a day), and the building (electromagnetic noise, suburban coverage). Start on one line and check that the data is complete, that the protocol matches, and that MES and SCADA stay linked. Lines and AGVs should use 4G. Infrequent monitoring can use NB-IoT.
A radio on the machine is at the center of a factory going digital. SimtoLink has supplied modules to automotive, electronics, and machinery customers.