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Industrial protocols guide for Arduino, ESP32 and Raspberry PLCs
A free PDF on the main industrial communication protocols and the ones used by open source PLCs.
- Main protocols: Modbus, MQTT, HTTP and HTTPS, Ethernet and PROFINET explained.
- On Industrial Shields PLCs: Serial TTL, RS-485, RS-232, Wi-Fi and BLE, LoRa, GPRS/GSM and CAN bus.
- Why open source PLCs: no licence fees, more I/O and standard communications.
Download the free guide
Fill in the form and download the PDF in English or Spanish.
Industrial protocols guide: frequently asked questions
Which industrial protocols does the guide explain?
Modbus (RTU and TCP), MQTT, HTTP and HTTPS, Ethernet and PROFINET, and which interfaces the Industrial Shields PLCs offer for them.
Is the guide free?
Yes. Fill in the form and you get the PDF download in English and Spanish.
More free guides for open source PLCs
Each guide is a PDF in English and Spanish.



