StamPLC

SKU:K141

Description

StamPLC is an IoT Programmable Logic Controller designed for industrial automation and remote monitoring. The product uses the Stamp-S3A control module, offering strong processing power and efficient wireless connectivity. In terms of control, StamPLC provides 8-channel optocoupler isolated digital inputs and 4-channel relay outputs (supporting AC / DC loads), along with GPIO.EXT and 2 HY2.0-4P ports, making the connection of various sensors and actuators simple and reliable. With onboard PWR-CAN and PWR-485 interfaces, the device can be seamlessly integrated into industrial field bus networks to achieve remote data transmission and centralized control. For human-machine interaction, the product features a 1.14-inch color display, RESET/BOOT keys, 3 user buttons, and a buzzer, enabling users to configure parameters and monitor status in real-time, and promptly alert in case of anomalies. To suit harsh industrial environments, StamPLC supports DC 6 ~ 36V wide-voltage power supply and is designed for DIN rail installation to ensure sturdy mounting; the built-in microSD slot facilitates data storage and firmware upgrading. Its environmental monitoring system integrates the LM75 temperature sensor and INA226 voltage/current sensor to provide real-time feedback on operating status, while the RTC (RX8130CE) module ensures accurate time synchronization and log recording. The factory firmware by default uploads data to M5's EZData cloud platform, automatically generating monitoring pages, offering users a convenient remote cloud access and control method. This product is suitable for industrial automation, remote monitoring, and smart manufacturing applications.

Tutorial

Quick Start

Quick Start

StamPLC built-in firmware usage tutorial.

Arduino IDE

Arduino IDE

This tutorial will show you how to program and control StamPLC devices using Arduino IDE.

UiFlow2

UiFlow2

This tutorial will show you how to control StamPLC devices using the UiFlow2 graphical programming platform.

Note

Power Notes

The PWR-CAN and PWR-485 output power pins of StamPLC are directly connected to the main input power, so please ensure that the input voltage matches the power requirements of the external expansion device during use. For example, when using StamPLC to control Unit Roller485 or Unit RollerCAN, it is recommended to keep the input voltage between DC 6 ~ 16V to prevent damage caused by voltage mismatch.

Features

• Stamp-S3A control module (ESP32-S3FN8)
• EZData cloud monitoring
• 8-channel optocoupler isolated digital input
• 4-channel relay output (AC / DC)
• 1.14-inch color screen (ST7789v2)
• PWR-CAN & PWR-485 interface
• Wide voltage input (DC 6 ~ 36V)
• Voltage / current sensor
• Internal temperature sensor
• User buttons
• microSD slot
• DIN rail installation
• Buzzer
• HY2.0-4P port
• RTC module
• Development Platform
  • UiFlow2
  • Arduino IDE
  • ESP-IDF
  • PlatformIO

Includes

• 1 x StamPLC
• 4 x Mounting accessories
• 4 x Screw clamp mounting parts

Applications

• Industrial automation and remote control
• Distributed control systems
• Smart manufacturing

Specifications

Learn

Download Mode

Signal Input Sensor Wiring Method

The input channel integrates optocoupler isolation, supporting DC 5 ~ 36V high/low level signal input acquisition to adapt to different sensor input types.

• Low-level signal input wiring:
  - COM connects to the positive terminal of sensor power supply
  - INPUT connects to sensor input signal
  
• High-level signal input wiring:
  - COM connects to negative terminal of sensor power supply
  - INPUT connects to sensor input signal
  

Schematics

• StamPLC_CPU Schematics PDF
• StamPLC_IO Schematics PDF

1/2

PinMap

PWR-485 & PWR-CAN

RGB & User Buttons A/B/C

• Controlled via PI4IOE5V6408 (0x43)

microSD Slot

Sensors

LCD

Buzzer

Relay & Optocoupler

• Controlled via AW9523B (0x59)

• Relay Control

• Optocoupler Output

• Optocoupler Input

GPIO.Ext

HY2.0-4P

• PORT.A

• PORT.C

Model Size

Datasheets

• INA226AIDGSR
• LM75BDP
• ST7789V2
• PWR-485
• PRW-CAN
• AW9523B
• PI4IOE5V6408
• EL3H4

Softwares

Quick Start

• StamPLC Quick Start

Arduino

• StamPLC Arduino Quick Start
• StamPLC Arduino Library

UiFlow2

• StamPLC UiFlow2 Quick Start

ESP-IDF

• StamPLC Factory Firmware

PlatformIO

[env:m5stack-stamp-s3]
platform = espressif32
board = esp32-s3-devkitc-1
framework = arduino
upload_speed = 1500000
build_flags =
    -DESP32S3
    -DCORE_DEBUG_LEVEL=5
    -DARDUINO_USB_CDC_ON_BOOT=1
    -DARDUINO_USB_MODE=1

lib_deps =
    M5StamPLC=https://github.com/m5stack/M5StamPLC
    M5Unified=https://github.com/m5stack/M5Unified

Protocol

• Internal I2C device communication addresses

• Modbus

Register Map:

1. Coils (Read/Write)

• Address 0: Relay 1 output (true/false)
• Address 1: Relay 2 output (true/false)
• Address 2: Relay 3 output (true/false)
• Address 3: Relay 4 output (true/false)

2. Input Registers (Read-only)

• Address 0-7: Inputs (true/false) - 8 registers
• Address 8-9: Temperature (FLOAT32) - 2 registers
• Address 10-11: Bus Voltage (FLOAT32) - 2 registers
• Address 12-13: Shunt Current (FLOAT32) - 2 registers

Easyloader

Other

• StamPLC Restore Factory Firmware Tutorial

Video

• StamPLC product introduction and case demo