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
Skip to content
