M5Stamp PLC Controller with M5StampS3

The M5Stack StamPLC is an IoT programmable logic controller designed for industrial automation and remote monitoring. The product is based on the StampS3A control module, which not only delivers powerful processing capabilities but also provides efficient wireless connectivity. In terms of control, StamPLC offers 8 opto-isolated digital inputs and 4 relay outputs (supporting both AC and DC loads), along with a GPIO.EXT port and 2 Grove interfaces, making the integration of various sensors and actuators both simple and reliable. Meanwhile, through the onboard PWR-CAN and PWR-485 interfaces, the device can be seamlessly integrated into industrial fieldbus networks, enabling remote data transmission and centralised control. For human-machine interaction, the product features a 1.14" colour display, a RESET/BOOT button, 3 user buttons, and a buzzer, which facilitate real-time parameter configuration and status monitoring, and can alert users in the event of anomalies. To withstand harsh industrial environments, StamPLC supports a wide voltage input (DC 6–36V) and is designed for DIN rail mounting to ensure secure installation; the built-in Micro SD card slot further facilitates data storage and firmware updates. Additionally, its environmental monitoring system integrates an LM75 temperature sensor and an INA226 voltage/current sensor for real-time feedback on device operation, while the RTC (RX8130CE) module ensures accurate time synchronisation and log recording. The factory firmware automatically uploads data to M5’s EZDATA cloud platform, generating monitoring pages and offering users convenient remote cloud access and control.

Features

* StampS3A Control Module (ESP32-S3FN8)

* EZData Cloud Monitoring

* 8 Opto-isolated Digital Inputs

* 4 Relay Outputs (AC/DC)

* 1.14-inch Color Display (ST7789v2)

* PWR-CAN & PWR-485 Interfaces

* Wide Voltage Input (DC 6–36V)

* Voltage/Current Sensor

* Internal Temperature Sensor

* User Buttons

* Micro SD Card Slot

* DIN Rail Mounting

* Buzzer

* Grove Interface

* RTC Module

* Development Platform

* UIFlow 2.0

* Arduino IDE

* ESP-IDF

Specifications

Control Module StampS3A Control Module, based on ESP32-S3FN8, with 8MB Flash, 2.4GHz Wi-Fi

FLASH 8MB

Digital Inputs 8 opto-isolated digital inputs, Input voltage range: DC 5~36V

Digital Outputs 4 relay outputs

Relays AC – 5A @ 250V DC – 5A @ 28V

DC Power Supply Supports wide voltage input of DC 6–36V @ 1A DC Power Connector: DC5521 (female, 5.5 x 2.1mm, center positive, outer negative)

Expansion Interfaces GPIO.EXT interface, 2 Grove interfaces

Communication Interfaces Onboard PWR-CAN and PWR-485 interfaces

PWR-CAN Interface XT30(2+2)PW-M

PWR-485 Interface HT3.96-4P

Display 1.14-inch color display (135×240 resolution), driven by ST7789v2 chip

Interactive Controls 1 RESET/BOOT button, 3 user buttons, buzzer

Data Storage Built-in Micro SD card slot

Sensors LM75 temperature sensor, INA226 voltage/current sensor, RTC (RX8130CE)

IO Port Load Capacity 2×8 connector maximum load: DC-4.76V @ 700mA Grove port load test: DC-4.81V @ 700mA

Power Consumption Standby current: (5V supply) DC-5V @ 21.60mA, (12V supply) DC-12V @ 15.22mA Operating current: (5V supply) DC-5V @ 93.89mA, (12V supply) DC-12V @ 47.84mA

Installation Method DIN rail mounting

Operating Temperature 0–40°C

Product Size 72.0 × 80.0 × 33.4mm

Product Weight 139.4g

Packaging Size 102.0 x 94.0 x 37.0mm

Gross Weight 163.7g

Resources

* Product documentation

* Tutorials

* Quick Start - StamPLC Built-in Firmware Usage Tutorial

* Arduino IDE - This tutorial will show you how to control the StamPLC device using the Arduino IDE

* UiFlow2 - This tutorial will show you how to control the StamPLC device using the UiFlow2 graphical programming platform

* StamPLC factory firmware update tutorial

* StamPLC Arduino Library

* Pinout

* CPU Schematic

* IO Schematic

* Dimension drawing

* Datasheets

* INA226AIDGSR

* LM75BDP

* ST7789V2

* PWR-485

* PRW-CAN

* AW9523B

* PI4IOE5V6408

* EL3H4

Package Contents

* 1 x StamPLC

* 4 x Mounting Accessories

* 4 x Screw Clip Fasteners