50% OFF! Hot items selling fast—Grab them before they're gone!
Unconditional Satisfaction GuaranteeNo Shipping Fees Above 302 Months to Decide. Returns Simplified.The StamPLC Controller is an IoT programmable logic controller built around the Stamp-S3A control module for industrial automation and remote monitoring. It combines ESP32-S3 processing, 2.4GHz Wi-Fi, isolated digital inputs, relay outputs, field-bus power interfaces, and a compact DIN-rail form factor.
For industrial control, the StamPLC Controller provides 8-channel optocoupler-isolated digital input, 4-channel relay output for AC or DC loads, GPIO.EXT, 2 HY2.0-4P ports, PWR-CAN, and PWR-485. A 1.14-inch color display, RESET/BOOT keys, 3 user buttons, a buzzer, microSD storage, LM75 temperature sensing, INA226 voltage/current sensing, and RTC logging help with local monitoring and maintenance.
The factory firmware uploads data to M5 EZData by default, automatically generating monitoring pages for convenient remote access and control. The StamPLC Controller is suitable for distributed control systems, smart manufacturing, industrial automation, and remote equipment monitoring.
Notice: The PWR-CAN and PWR-485 output power pins are directly connected to the main input power. Make sure the input voltage matches the external expansion device. For Unit Roller485 or Unit RollerCAN, the note recommends keeping input voltage between DC 6 and 16V to avoid damage from voltage mismatch.
| Module model | Stamp-S3A control module |
| SoC | ESP32-S3FN8, Xtensa LX7 dual-core, up to 240MHz |
| Flash | 8MB |
| Wireless | 2.4GHz Wi-Fi |
| Digital input | 8-channel optocoupler-isolated input, DC 5 to 36V |
| Digital output | 4-channel relay output |
| Relay rating | AC 5A at 250V; DC 5A at 28V |
| Power input | DC 6 to 36V at 1A; DC5521 female connector, center positive |
| Expansion ports | GPIO.EXT port and 2 HY2.0-4P ports |
| Communication ports | PWR-CAN and PWR-485 interfaces |
| Display | 1.14-inch color display, 135 x 240 resolution, ST7789v2 driver |
| Interaction | RESET/BOOT button, 3 user buttons, buzzer, RGB LED |
| Data storage | Built-in microSD slot |
| Sensors | LM75 temperature sensor, INA226 voltage/current sensor, RX8130CE RTC |
| Power consumption | Standby: DC 5V at 21.60mA or DC 12V at 15.22mA; working: DC 5V at 93.89mA or DC 12V at 47.84mA |
| Installation | DIN rail installation |
| Operating temperature | 0 to 40 C |
| Product size | 72.0 x 80.0 x 33.4mm |
| Product weight | 138.9g |
| Package size | 102.0 x 94.0 x 33.4mm |
| Gross weight | 177.5g |
To enter download mode, connect the data cable, hold the Boot button until the red indicator light turns on, and then release the Boot button. For signal-input wiring, the input channels use optocoupler isolation and support both high-level and low-level DC 5 to 36V input signal acquisition.
The StamPLC Controller exposes pin mappings for PWR-CAN, PWR-485, RGB, user buttons, microSD, sensors, LCD, buzzer, relay control, optocoupler input, StamPLC-Bus, and HY2.0-4P ports. RGB color generation uses on/off combinations of the independent R/G/B channels and does not support PWM brightness dimming or gradient effects.
StamPLC product document
StamPLC built-in firmware quick start guide
StamPLC Arduino programming guide
StamPLC UiFlow2 programming guide
StamPLC Home Assistant integration guide
StamPLC restore factory firmware tutorial
StamPLC Stamp-S3A main board schematic PDF
StamPLC IO board schematic PDF
StamPLC structure files
StamPLC Arduino library repository
StamPLC factory firmware and user demo repository
The StamPLC Controller reads 8 optocoupler-isolated digital input channels with a DC 5 to 36V input range.
The 4 relay outputs are rated for AC 5A at 250V or DC 5A at 28V, depending on the load and installation conditions.
Yes. The device includes PWR-CAN and PWR-485 interfaces for integration with industrial field-bus networks.
The documentation provides quick starts for built-in firmware, Arduino IDE, UiFlow2, Home Assistant, factory firmware restoration, ESP-IDF, and PlatformIO workflows.
