OpenPLC on M-Duino 42+ Jun 18, 2026 Note: this blog was made before M-Duino was officially implemented into OpenPLC. For an updated guide on how to use M-Duino with OpenPLC, visit this blog: Using ESP32 PLC, M-Duino and Ardbox with Open... Read more
Node-RED: How to make a custom design gauge for your dashboard Jun 18, 2026 Introduction Node-RED is a powerful, open-source visual programming tool designed to simplify the process of wiring together hardware devices, APIs, and online services in new and innovative ways. Nod... Read more
ACS712 current sensor with Arduino-based PLC: wiring and sketch Jun 18, 2026 The ACS712 is a Hall-effect current sensor by Allegro MicroSystems that outputs an analog voltage proportional to the AC or DC current flowing through it. Connecting one to an Arduino-based PLC gives ... Read more
FZ0430 voltage sensor module with Arduino-based PLC: wiring and sketch Jun 18, 2026 The FZ0430 is a resistive voltage divider module that scales DC voltages up to 25 V down to the 0–5 V range readable by an Arduino analog input. Connecting one to an Arduino-based PLC gives you direct... Read more
Controlling ESP32 PLC digital outputs with Arduino Cloud Jun 15, 2026 This article is the second in a series on using the Industrial Shields ESP32 PLC with Arduino Cloud. It shows how to add a cloud variable, configure the network, upload the sketch, and build a dashboa... Read more
Detecting RFID tags with the RC522 reader and M-Duino PLC Jun 15, 2026 RFID (Radio Frequency Identification) technology enables automatic identification of objects and people via tags that transmit a unique UID when brought near a reader. This article shows how to connec... MDuino Open-Source SPI Read more
Reading the IE5345 inductive proximity sensor with M-Duino PLC Jun 15, 2026 The IE5345 is an IFM inductive proximity sensor that detects metallic objects at a range of 5 mm and outputs a digital signal. Because inductive sensors respond only to metal, they work reliably in we... MDuino Sensor Read more
Publishing DS18B20 temperature data from M-Duino PLC via MQTT Jun 15, 2026 This is part 1 of a series showing how to build a data pipeline from an Industrial Shields M-Duino PLC to a Google spreadsheet using MQTT and Node-RED. In this first part, the M-Duino reads the temper... DS18B20 MDuino MQTT Read more
Connecting multiple SPI slaves to an M-Duino PLC Jun 15, 2026 SPI (Serial Peripheral Interface) is a synchronous serial communication protocol commonly used to connect a master device to one or more peripherals. Compared to I2C, SPI is faster and simpler: instea... MDuino Open-Source SPI Slave Read more
Controlling addressable LED strips with M-Duino and ESP32 PLC Jun 15, 2026 Addressable LED strips such as the WS2812B use a single data wire to control each LED individually in colour and brightness. This article shows how to connect a WS2812B strip to an M-Duino or ESP32 PL... Read more
Controlling a stepper motor with an ESP32 PLC Jun 15, 2026 In this post we will see how to control a stepper motor using an ESP32 PLC. We will cover the basics of stepper motors, their features, and how they work in combination with a driver controlled by the... Read more
Introduction to InfluxDB Jun 11, 2026 What is InfluxDB? InfluxDB is an open source time series database (TSDB). It is designed to efficiently handle large volumes of time-stamped data, making it particularly well-suited for applications t... Read more