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ESP32 MicroPLC

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ESP32 MicroPLC – Open-Source Smart Home Automation Controller.

The ESP32 MicroPLC is a compact and powerful controller designed to manage and automate various equipment through the use of extension modules. Built around the ESP32-Wroom-32U microcontroller, it integrates seamlessly with Home Assistant via pre-installed ESPHome firmware, enabling straightforward configuration and control of smart home devices.


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    Display Name: ESP32 MicroPLC

    Functions:

    • Manages the configuration of extension modules
    • Facilitates the execution of computational tasks for both onboard and extension modules
    • Provides connectivity to the Smart Home system's extension modules via wireless networks


    Key Features:

    • Controller
      ESP32-Wroom-32U
    • Designed special for ESPHome.
      All elements of the PLC are fully compatible with ESPHome, ensuring optimal integration.
    • Built-in USB Interface
      For programming and debugging
    • Front panel
      LED lights, control buttons on the front panel
    • Connectivity
      RS485 Modbus interface for connecting extension modules;
    • Additional Components
      Features a PCF8563 real-time clock (RTC) module and is designed for DIN rail mounting.

    MiniPLC Capabilities:


    USB
    USB Type-C port for programming purposes.

    • RS-485
      RS485 Modbus interface designed for the integration of supplementary extension modules
    • WiFi and BT
      Integrated into the ESP32's WiFi capabilities.
    • 1-WIRE
      One channel designed for 1-Wire bus communication, featuring ESD and overvoltage protection to improve reliability.


    LEDs and Buttons
    Four customizable buttons positioned on the front panel, along with LED indicators for displaying status on the front panel.

    • RTC
      PCF8563 Real-Time Clock (RTC) Module for Precision Timekeeping
    • Relay
      One high-performance industrial relays for control applications, equipped with varistor protection for enhanced reliability. The relays are optically isolated from the MCU.
    • Digital Input
      Digital input designed for 24 volts DC operation, employing the ISO1212 integrated circuit for digital sourcing capabilities and surge protection.

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    Electrical Data


    • Power supply
      24VDC, USB-C female (5V DC via USB-C) for programming
    • Power consumption
      typ. 1W, max. 2W
    • ESP32
      ESP32-WROOM-32U
    • Wi-Fi
      Reliablity HTOL/HTSL/uHAST/TCT/ESD,  Protocols 802.11 b/g/n (802.11n up to 150 Mbps), A-MPDU and A-MSDU aggregation and 0.4 µs guard interval support, Frequency range 2.4 GHz ~ 2.5 GHz
    • Bluetooth
      Protocols Bluetooth v4.2 BR/EDR and BLE specification, Radio NZIF receiver with –97 dBm sensitivity, Class-1, class-2 and class-3 transmitter, AFH
    • Ambient
      Temperature 0 ... 50°C / 32 ... 122°F, Humidity max. 95% r.H. (non condensing)


    • Digital Input
      One isolated, surge protected digital sourcing inputs, logic 0: 0 ... 9.2VDC, undefined: 9.2 ... 15.8VDC, logic 1: 15.8 ... 24VD
    • Digital Output
      One digital output (relay with optocoupler and varistor surge protection), dry contact, 250VAC 16A at cosᵠ =1,250VAC 9A at cosᵠ =0.4, 30VDC 10A
    • 1-WIRE
      1-WIRE bus, 5VDC bus power supply, ESD Protected
    • RS-485
      Half-duplex, data rate 115,2 kbps, short-circuit current limited and protected against excessive power dissipation, fail-safe for open circuit, surge protected
    • USB
      USBUSB type-C USB Specification 2.0 compliant, ESD protected, Silicon Labs CP2102N USB-to-UART bridge controller, Virtual COM Port Device Drivers, Works with existing COM port Applications, Supported on Windows, Mac, and Linux
    • Real-time clock
      PCF8563

    Start with the customer – find out what they want and give it to them.

    Manuals:
    ​
    Firmware:
    ​
    Schematics:


    MCUBoard.pdf

    RelayBoard.pdf