Data loggers

Industrial Data Logger Board

PLC and RS-485/Modbus gateway with local logging and cloud upload.

An industrial communication gateway that acquires PLC and device data through RS-485/Modbus, logs it locally and transmits it to cloud platforms for monitoring and analytics.

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Specifications

Hardware, connectivity, power and expansion details.

Controller: ESP32
Industrial protocol: Modbus RTU
Field interface: RS-485
Wireless: Wi-Fi
Storage: microSD
Timekeeping: RTC

Core features

What it can do.

ESP32 gateway processing
PLC communication
RS-485 / Modbus RTU
Wi-Fi data transfer
RTC timestamped logging
microSD storage and cloud upload

Suitable applications

Where it fits.

PLC data collectionSCADA systemsFactory monitoringEnergy monitoringRemote diagnosticsCloud dashboards

Communication and interfaces

How it connects.

These are the supported hardware interfaces and protocols stated for this product.

RS-485

Differential serial wiring commonly used on industrial equipment.

Modbus RTU

Supported protocol for reading compatible PLCs and field devices.

Wi-Fi

Transfers records to the selected network or cloud service.

microSD and RTC

Keeps timestamped records at the edge when connectivity is unavailable.

Student view

How to understand this product.

Understand the complete path from a factory register to a dashboard chart.

What you can learn

RS-485 wiring
Polling Modbus RTU registers
Data timestamping and buffering
Time-series monitoring

A simple project flow

Poll a compatible PLC or meter.
Validate, timestamp and store readings.
Upload a batch when the network is available.

Real-world applications

Example projects showing what this product can read, control and report. Each requires the appropriate sensors, connected equipment and application software.

Factory energy monitoring

Example: poll voltage, current and energy registers from a compatible Modbus RTU meter over RS-485. The logger timestamps readings, stores them on microSD and uploads them over Wi-Fi for shift-by-shift consumption reports.

Production and downtime logging

Example: read run-state and production-count registers from a compatible PLC. Software records state changes and counter values so a dashboard can show output and stopped periods for each shift.

Process temperature history

Example: read temperature registers from an RS-485/Modbus process controller. Save timestamped measurements locally and upload the history so operators can review temperature changes during a production batch.